Ethernet cabling

Ethernet cabling

Ethernet was first implemented by a group called DIX, which stands for digital, Intel, and Xerox. They created and implemented the first Ethernet LAN specification, which the IEEE used to create the IEEE 802.3 committee. This was a 10 Mbps network that ran on coax and then eventually twisted-pair and fiber physical media.

Three types of Ethernet cables are available:

1. Straight-through cable

2. Crossover cable

3. Rolled over cable

Straight-through cable

The straight-through cable is used to connect the Host to the switch or hub, and the router to the switch or hub. Four wires are used in straight-through cables to connect Ethernet devices. It is relatively simple to create this type, the four wires used in a straight-through Ethernet cable.

Only pins 1, 2, 3, and 6 are used. Just connects 1 to 1, 2 to 2, 3 to 3, and 6 to 6. Remember that this would be an Ethernet-only cable and wouldn’t work with Voice, Token ring, ISDN, and so on.

Crossover cable

The crossover cable can be used to connect switch to switch, hub to hub, host to host, and 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.

Instead of connecting 1 to 1, 2 to 2, and so on, here we connect pins 1 to 3 and 2 to 6 on each side of the cable.

Rolled over 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 hyper-terminal to the Cisco hardware. Eight wires are used in this cable to connect serial devices, although not all eight are used to end information, just as in Ethernet networking.

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