1copy 2004 Cisco Systems Inc All rights reserved
Wireless Local Area Networks(WLANs)
222copy 2004 Cisco Systems Inc All rights reserved
What is a wireless LAN
bull In wired network we use physical medium such as bull 1- Coaxial cablesbull 2- Twisted pairbull 3- Fiber optics
bull Is the linking of two or more computer without using wires
bull Wireless LAN (WLAN) - provides all the features and benefits of traditional LAN technologies such as Ethernet but without the limitations of wires or cables
bull WLAN like a LAN requires a physical medium to transmit signals
333copy 2004 Cisco Systems Inc All rights reserved
What is a wireless LAN
bull Instead of using cables WLANs usendash Infrared light (IR)
bull 80211 does include an IR specificationbull limitations easily blocked
ndash Radio frequencies (RFs)bull Can penetrate most office obstructions
80211b Access Point
Bar code scannerPDA
Telephone
444copy 2004 Cisco Systems Inc All rights reserved
Why are the using of Radio Frequencies (RFs) more than Infrared Light (IR)
bull the using of Radio Frequencies (RFs) more than Infrared Light (IR) because of
bull 1- Higher Bandwidth
bull 2- Wider coverage WLAN use 24 and 5 GHZ frequency band
bull 3- Provide freedom and flexibility within building and between buildings
555copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull The wireless network is less complex than wired networks
bull There are two basic components in wireless network
1- Wireless Access Point (WAP)
2- a wireless NIC
666copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull First Wireless Access Point
bull 1- Is a central component (like a hub or switch)
bull 2- Its function is to operate as a hub for wireless devices
bull 3- It has at least one antenna
bull 4- It has a port to connect the wireless AP to a wired network
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
222copy 2004 Cisco Systems Inc All rights reserved
What is a wireless LAN
bull In wired network we use physical medium such as bull 1- Coaxial cablesbull 2- Twisted pairbull 3- Fiber optics
bull Is the linking of two or more computer without using wires
bull Wireless LAN (WLAN) - provides all the features and benefits of traditional LAN technologies such as Ethernet but without the limitations of wires or cables
bull WLAN like a LAN requires a physical medium to transmit signals
333copy 2004 Cisco Systems Inc All rights reserved
What is a wireless LAN
bull Instead of using cables WLANs usendash Infrared light (IR)
bull 80211 does include an IR specificationbull limitations easily blocked
ndash Radio frequencies (RFs)bull Can penetrate most office obstructions
80211b Access Point
Bar code scannerPDA
Telephone
444copy 2004 Cisco Systems Inc All rights reserved
Why are the using of Radio Frequencies (RFs) more than Infrared Light (IR)
bull the using of Radio Frequencies (RFs) more than Infrared Light (IR) because of
bull 1- Higher Bandwidth
bull 2- Wider coverage WLAN use 24 and 5 GHZ frequency band
bull 3- Provide freedom and flexibility within building and between buildings
555copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull The wireless network is less complex than wired networks
bull There are two basic components in wireless network
1- Wireless Access Point (WAP)
2- a wireless NIC
666copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull First Wireless Access Point
bull 1- Is a central component (like a hub or switch)
bull 2- Its function is to operate as a hub for wireless devices
bull 3- It has at least one antenna
bull 4- It has a port to connect the wireless AP to a wired network
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
333copy 2004 Cisco Systems Inc All rights reserved
What is a wireless LAN
bull Instead of using cables WLANs usendash Infrared light (IR)
bull 80211 does include an IR specificationbull limitations easily blocked
ndash Radio frequencies (RFs)bull Can penetrate most office obstructions
80211b Access Point
Bar code scannerPDA
Telephone
444copy 2004 Cisco Systems Inc All rights reserved
Why are the using of Radio Frequencies (RFs) more than Infrared Light (IR)
bull the using of Radio Frequencies (RFs) more than Infrared Light (IR) because of
bull 1- Higher Bandwidth
bull 2- Wider coverage WLAN use 24 and 5 GHZ frequency band
bull 3- Provide freedom and flexibility within building and between buildings
555copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull The wireless network is less complex than wired networks
bull There are two basic components in wireless network
1- Wireless Access Point (WAP)
2- a wireless NIC
666copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull First Wireless Access Point
bull 1- Is a central component (like a hub or switch)
bull 2- Its function is to operate as a hub for wireless devices
bull 3- It has at least one antenna
bull 4- It has a port to connect the wireless AP to a wired network
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
444copy 2004 Cisco Systems Inc All rights reserved
Why are the using of Radio Frequencies (RFs) more than Infrared Light (IR)
bull the using of Radio Frequencies (RFs) more than Infrared Light (IR) because of
bull 1- Higher Bandwidth
bull 2- Wider coverage WLAN use 24 and 5 GHZ frequency band
bull 3- Provide freedom and flexibility within building and between buildings
555copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull The wireless network is less complex than wired networks
bull There are two basic components in wireless network
1- Wireless Access Point (WAP)
2- a wireless NIC
666copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull First Wireless Access Point
bull 1- Is a central component (like a hub or switch)
bull 2- Its function is to operate as a hub for wireless devices
bull 3- It has at least one antenna
bull 4- It has a port to connect the wireless AP to a wired network
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
555copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull The wireless network is less complex than wired networks
bull There are two basic components in wireless network
1- Wireless Access Point (WAP)
2- a wireless NIC
666copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull First Wireless Access Point
bull 1- Is a central component (like a hub or switch)
bull 2- Its function is to operate as a hub for wireless devices
bull 3- It has at least one antenna
bull 4- It has a port to connect the wireless AP to a wired network
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
666copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
bull First Wireless Access Point
bull 1- Is a central component (like a hub or switch)
bull 2- Its function is to operate as a hub for wireless devices
bull 3- It has at least one antenna
bull 4- It has a port to connect the wireless AP to a wired network
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
777copy 2004 Cisco Systems Inc All rights reserved
Wireless Network components
Second Wireless NIC
Wireless NIC does the same job as traditional NIC but instead of having a socket to plug some cable into the wireless NIC will have a radio antenna
Wireless antenna act as transmitter and receiver
There are two classes of antennas
1- OMNI directional antennas (point-to-multipoint)
EX FM antenna
2- Directional (Yagi (or) point-to- point)
Yagi is limited in coverage area
Most of WAP use OMNI antenna
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
888copy 2004 Cisco Systems Inc All rights reserved
Why Wireless
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
999copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
Infrared networking bull Is a type of wireless networking
bull Point-to-point communication short distance
bull Infrared wireless use IrDA standard ( standard for point-to-point)
bull Data transmission rate (16mbps)updated to (100 mbps)
bull Max range = 1 meter
Bluetooth networkingbull Wireless standard
bull Max throughput = 1 mbps
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
101010copy 2004 Cisco Systems Inc All rights reserved
Wireless LAN standards
80211 bull Is a set of standards that govern wireless network transmission
methods
bull Provide authentication and authorization of LAN nodes
bull Developed by IEEE LANMAN standard in 1997
bull Frequency range = 24 GHZ
bull Support Max network bandwidth (Data rate)= 2 Mbps
bull In noisy environments fall back to 1 Mbps
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
111111copy 2004 Cisco Systems Inc All rights reserved
80211a
80211 is too slow for most application
Max data rate (BW)= 54 Mbps
Radio frequency range= 5 GHZ
Max range (indoor) = 76 m
Max range (outdoor) = 305 m
Advantages
1- Fast Max speed
2- Regulated frequency prevent interference from other devices
Disadvantages
1- Highest cost
2- shorter range signal that more easily obstructed
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
121212copy 2004 Cisco Systems Inc All rights reserved
80211b
Data rate (BW)= 11 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Lowest cost
2- Signal range is good and not easily obstructed
3- It is easy to install
Disadvantages
1- Slowest Max speed
2- Home application may interfere on the unregulated frequency band
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
131313copy 2004 Cisco Systems Inc All rights reserved
80211g
Data rate (BW)= 54 Mbps
Radio frequency range= 24 GHZ
Max range (indoor) = 91 m
Max range (outdoor) = 457 m
Advantages
1- Fast Max speed
2- Signal range is good and not easily obstructed
Disadvantages
1- cost more than 80211b
2- application may interfere on the unregulated frequency band
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
141414copy 2004 Cisco Systems Inc All rights reserved
More about WLAN
bull Modes of Operation
bull 1048715 Ad-Hoc mode (Independent Basic
Service Set - IBSS)
bull 1048715 Infrastructure mode (Basic Service
Set - BSS)
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
151515copy 2004 Cisco Systems Inc All rights reserved
Installation type
Ad-Hoc mode
In this mode the wireless NICs or other devices can communicate directly without the need for a WAP
To setup a basic ad-hoc wireless network all you need are two wireless NIC and two computers
during the installation of the software you will be asked at some point if you want to setup the NIC in ad-hoc mode or infrastructure mode choose ad-hoc mode the bring the computers within range (90-100) meter then you will be able to connect to each other
Client A Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
161616copy 2004 Cisco Systems Inc All rights reserved
Installation type
Infrasructure modebull In this mode NICs will only communicate with an access point
(instead of each other as in ad-hoc mode)
bull The access point will facilitate communication between the wireless nodes as well as communication with a wired network (if present)
Client A
Access point
Client B
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