Ethernet Cabling
Ethernet cabling is an
important discussion, especially if you are planning on taking the Cisco CCNA
exam. The types of Ethernet cables available are:
* Straight-through cable
* Crossover cable
Straight-Through
Cable
The straight-through
cable is used to connect
* Host to switch or hub
* 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; Fig. 7 shows the four wires used in a straight-through
Ethernet cable.
Fig - 7
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.
Crossover
Cable
The crossover cable can
be used to connect
* Switch to switch
* Hub to hub
* Host to host
* Hub to switch
* 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. Fig. 8 shows how the four wires are used in a crossover Ethernet
cable. Notice that here we connect pins 1 to 3 and 2 to 6 on each side of the
cable.
Fig - 8
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 with additional converter. 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. Fig. 9
shows the eight wires used in a rolled cable.
Fig - 9
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. Set
the configuration as follows:
* Bits per second: 9600
* Data bits: 8
* Parity: none
* Stop bits: 1
* Flow control: none
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