Upload
httpheiserzcom
View
220
Download
0
Embed Size (px)
Citation preview
8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
1/31
Chapter 7 Wireless Tecnology
CCNA Discovery 4.0
PDF created with pdfFactory trial version www.pdffactory.com
http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
2/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Objectives
Describe wireless technologies. Describe the various components and structure of a
WLAN
Describe wireless LAN security issues and mitigation
strategies Configure an integrated wireless access point and a
wireless client .
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
3/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Wireless Technology and DevicesDescribe the various wireless technologies and the devices that use them
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
4/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Wireless Technology and DevicesInfrare
Infrared (IR) is relatively low energy and cannot penetrate through walls orother obstacles
It is commonly used to connect and move data between devices such as
Personal Digital Assistants (PDAs) and PCs A specialized communication port known as an Infrared Direct Access (IrDA)port uses IR to exchange information between devices
R only allows a one-to-one type of connection. It is generally used for short-range, line-of-sight, communications IR is also used for remote control devices, wireless mice, and wireless
keyboards
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
5/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Wireless Technology and DevicesRadio Frequency (RF)
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
6/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Benefits and Limitations of Wireless Technology
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
7/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Types of Wireless Networks and Their Boundaries
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
8/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Wireless LAN Standards
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
9/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Wireless LAN Components
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
10/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Wireless LAN ComponentsAntennas
Used on APs and Wireless bridges Increases the output signal
strength from a wireless device
Receives wireless signalsfrom other devices such as STAs
Increase in signal strengthfrom an antenna is known as the gain
Higher gains usually translate
into increased transmission distances
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
11/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
WLANS and SSID Identify and describe various wireless modes and the importance of the
SSID IBSS ad hoc
BSS - infrastructure
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
12/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
WLANS and SSID Describe how wireless channels are used CSMA/CA: Describe how wireless channels avoid collisions
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
13/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Configuring The Access Point
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
14/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Wireless Technology
Configuring the Wireless Clients
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
15/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Why people Attack WLANs Describe why and how people attack wireless networks
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
16/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Why people Attack WLANs Describe why and how people attack wireless networks
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
17/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Why people Attack WLANs Describe why and how people attack wireless networks
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
18/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Limiting Access to a WLAN
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
19/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Authentication on a WLANOpen Authentication
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
20/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Authentication on a WLANPre-shared keys (PSK)
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
21/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Authentication on a WLANExtensible Authentication Protocol (EAP)
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
22/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Authentication on a WLANExample:
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
23/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Encryption on a WLAN
Wired Equivalency Protocol (WEP)
WEP uses pre-configured keys to encrypt and decrypt data A WEP key is entered as a string of numbers and letters and is generally
64 bits or 128 bits long.
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
24/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Encryption on a WLAN
Wi-fi Protected Access (WPA)
WPA generates new, dynamic keys each time a client establishes aconnection with the AP
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
25/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Traffic Filtering on a WLAN
Describe traffic filtering and its purpose
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
26/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Planning the WLAN
Plan for a wireless LAN implementation
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
27/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Installing and Securing the AP
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
28/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Backing-up and Restoring Configuration Files
Describe options for backing-up and restoring AP configurations
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
29/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Update Firmware
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
30/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
Security Considerations on A Wireless LAN
Summary
Wireless technologies use electromagnetic radiation in theform of radio signals to carry information between devices.
Ease and convenience of connecting devices wirelesslycreates security concerns that need to be addressed.
Before installing wireless devices, an installation planshould be created which includes strategies for layout andsecurity.
PDF created with pdfFactory trial version www.pdffactory.com
http://www.bkacad.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.pdffactory.com/http://www.bkacad.com/8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]
31/31
Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
http://www.bkacad.com/http://www.bkacad.com/