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Ethernet cabling


Ethernet cabling 

Ethernet was first implement by group called DIX, Which stand 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 run 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


1.   
      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, the four wires used in a straight-through Ethernet cable.




Only pins 1, 2, 3, and 6 are used. Jus connect 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.
2.      

      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. 




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.
3.      
         
       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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