Semester 1 Module 5Cabling LANs and WANs

Ethernet Standards

Cabling Decisions• Cabling advantages and disadvantages are

based upon the following:• Cable length• Cost• Ease of installation• Susceptibility to interference

Ethernet• Most widely used networking technology

• Developed by DIX (Digital, Intel, Xerox)

• Basis for IEEE 802.3 specification• 802.3u refers to Fast Ethernet (100 Mbps)• 802.3z refers to Gigabit Ethernet over fiber• 802.3ab refers to Gigabit Ethernet over UTP

10BASE2• Uses 50-ohm _______ cable and is also known

as _______

• Maximum segment length is _____

• Uses a ___ topology

• Uses a ____ connector

coaxialThinnet

185 m

bus

BNC

10BASE5

• Uses 50-ohm _______ cable and is also known as _______

• Maximum segment length is _____

• Uses a ___ topology

• Uses an ____ connector

coaxialThicknet

500 m

bus

AUI

10BASE-T

• Uses category 3, 4, or 5 _____ cable.

• Maximum segment length is _____

• Uses a ____ topology

• Uses an _____ connector

UTP

100 mstar

RJ-45

100BASE-FX

• Uses category 62.5/125 ____________.

• Maximum segment length is _____

• Uses a ____ topology

• Uses an ________ connector

multimode fiber

400 mstar

SC or ST

Name It…

Name It…

5-4-3 Rule

• between any two nodes on the network, there can only be a maximum of five segments, connected through four repeaters, or concentrators, and only three of the five segments may contain user connections

Hubs

• _______ - connection point that doesn’t boost or clean up the signal

• ______ – amplifies the signal before its sent out any port

• _________ – an active hub with diagnostic capabilities

Passive

Active

Intelligent

Wireless

• The two most common wireless technologies used for networking are __ and __.

• Three of the most common wireless standards are _______, ________ and ________.

IRRF

802.11a 802.11b 802.11g

Bridges

• Break up a network into smaller segments.

• Switches and bridges operate at the ________ layer of the OSI model.

• When a bridge receives a frame on the network, the destination ___________ is looked up in the bridge table to determine whether to filter, flood, or copy the frame onto another segment.

data link

MAC address

Switches

• A switch is a more sophisticated device than a bridge.

• Ethernet switches are popular connectivity solutions because they improve network speed, bandwidth, and performance.

• They also operate at much higher speeds than bridges and can support new functionality, such as virtual LANs.

NICs

• NICs are considered Layer __ devices because each NIC carries a unique code called a _____ address.

• NICs control host access to the medium.

• A NIC is also referred to as a network adapter.

2MAC

Router WAN Connections

• For long distance communication, WANs use ______ transmission.

• If the connection is made directly to a service provider, the router will be a data terminal equipment (DTE) and use a DTE serial cable.

• However, there are occasions where the local router is required to provide the clocking rate and therefore will use a data communications equipment (DCE) cable.

serial

Name it…

What’s it used for?

Let’s PlayName that cable!

It Connects…

• A switch to a hub

• A Cisco router to a switch

• A Cisco router to a host

• A host to the console port of a Cisco router

• A PC to a hub

• A bridge to a switch

• A PC to a PC

• A host to a hub

• A PC to the AUI of a Cisco router