connecting to the network cables

8/9/2019 Connecting to the Network Cables

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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.12-1

Building a Simple Ethernet Network

Connecting to an Ethernet LAN


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Outline

Overview

Ethernet Network Interface Cards

Ethernet Media and Connection Requirements

Connection Media Unshielded Twisted-Pair Cable

UTP Implementation

Summary

Lab Exercise 2-1: Building a Simple Ethernet Network


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Network Interface Card


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Comparing Ethernet Media Requirements


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Differentiating Between Connections


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1000BASE-T GBIC


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Cisco Fiber-Optic GBICs

Short wavelength (1000BASE-SX)

Long wavelength/long haul (1000BASE-LX/LH)

Extended distance (1000BASE-ZX)


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Unshielded Twisted-Pair Cable

Speed and throughput: 10 to 1000 Mbps

Average cost per node: Least expensive

Media and connector size: Small

Maximum cable length: Varies


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RJ-45 Connector


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RJ-45 Jack


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Cable 10BASE-T/

100BASE-TX Straight-Through

Pin Label Pin Label

1

2

3

4

5

6

7

8

TX+

TX-

RX+

NC

NC

RX-

NC

NC

1

2

3

4

5

6

7

8

TX+

TX-

RX+

NC

NC

RX-

NC

NC

Straight-Through Cable

Wires on cable endsare in same order.

UTP Implementation (Straight-Through)


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Cable 10BASE-T or

100BASE-TX Straight-Through Crossover Cable

Some wires on cableends are crossed.

Pin Label Pin Label

1

2

3

4

5

6

7

8

TX+

TX-

RX+

NC

NC

RX-

NC

NC

1

2

3

4

5

6

7

8

TX+

TX-

RX+

NC

NC

RX-

NC

NC

EIA/TIA T568A EIA/TIA T568B

UTP Implementation (Crossover)


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UTP Implementation: Straight-Throughvs. Crossover


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Using Varieties of UTP


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Summary

Also called a LAN adapter, the NIC plugs into a motherboardand provides a port for connecting to the network.

The MAC address is burned onto each NIC by themanufacturer, providing a unique, physical network address

that permits the device to participate in the network. The cable and connector specifications used to support

Ethernet implementations are derived from the EIA/TIAstandards body.


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Summary (Cont.)

The categories of cabling defined for the Ethernet are derivedfrom the EIA/TIA-568 (SP-2840) Commercial BuildingTelecommunications Wiring Standards.

There are several connection media used for Ethernet, with

RJ-45 and GBIC being the most common. A GBIC is a hot-swappable I/O device that plugs into a

Gigabit Ethernet port.


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Summary (Cont.)

UTP cable is a four-pair wire. Each of the eight individualcopper wires in UTP cable is covered by an insulatingmaterial, and the wires in each pair are twisted around eachother.

A crossover cable is used to connect between similardevices (such as switch to switch, router to router, PC to PC,and hub to hub).

A straight-through cable is used to connect betweendissimilar devices (such as switch to router, switch to PC,hub to router, and hub to PC).


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connecting to the network cables

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