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Cables: I. Straight-Through Cable

This document discusses three types of Ethernet cables: 1) Straight-through cables connect devices like hosts to switches or routers to switches. They connect corresponding pins like 1 to 1, 2 to 2, etc. 2) Crossover cables can connect switches to switches or hosts directly and connect different pins like 1 to 3 and 2 to 6. 3) Rolled cables are used to connect a computer running terminal software to the console port of a router or switch for configuration. They reverse the wiring of one end of a straight-through cable.

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Jay Mehta
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112 views3 pages

Cables: I. Straight-Through Cable

This document discusses three types of Ethernet cables: 1) Straight-through cables connect devices like hosts to switches or routers to switches. They connect corresponding pins like 1 to 1, 2 to 2, etc. 2) Crossover cables can connect switches to switches or hosts directly and connect different pins like 1 to 3 and 2 to 6. 3) Rolled cables are used to connect a computer running terminal software to the console port of a router or switch for configuration. They reverse the wiring of one end of a straight-through cable.

Uploaded by

Jay Mehta
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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CABLES
Objective
This lab gives you the better understanding to make an Ethernet Cables.

The types of Ethernet cables available are:

1) Straight-through cable
2) Crossover cable
3) Rolled cable

i. Straight-Through Cable
The straight-through cable is used to connect

1) Host to switch or hub


2) Router to switch or hub

Four wires are used in straight-through cable to connect Ethernet devices. It is relatively
simple to create this type; Figure shows the four wires used in a straight-through Ethernet
cable.

Diagram

Notice that only pins 1, 2, 3, and 6 are used. Just connect 1 to 1, 2 to 2, 3 to 3, and 6 to 6,
and you’ll be up and networking in no time. However, remember that this would be an
Ethernet-only cable and wouldn’t work with Voice, Token Ring, ISDN, etc.
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ii. Crossover Cable Cable


The crossover cable can be used to connect

1) Switch to switch
2) Hub to hub
3) Host to host
4) Hub to switch
5) Router direct to host

The same four wires are used in this cable as in the straight-through cable; we just
connect different pins together. Figure shows how the four wires are used in a crossover
Ethernet cable.

Notice that instead of connecting 1 to 1, etc., here we connect pins 1 to 3 and 2 to 6 on


each side of the cable.

Diagram
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iii. Rolled Cable


Although rolled cable isn’t used to connect any Ethernet connections together, you can
use a rolled Ethernet cable to connect a host to a router console serial communication
(com) port.

If you have a Cisco router or switch, you would use this cable to connect your PC
running HyperTerminal to the Cisco hardware.

Eight wires are used in this cable to connect serial devices, although not all eight are used
to send information, just as in Ethernet networking. Figure shows the eight wires used in
a rolled cable.

Diagram

These are probably the easiest cables to make, because you just cut the end off on one
side of a straight-through cable and reverse the end.

Once you have the correct cable connected from your PC to the Cisco router or switch,
you can start HyperTerminal to create a console connection and configure the device

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