Cisco Certification: A Survival Guide To The Cisco Cable Jungle
One of the most confusing parts of beginning your Cisco studies is keeping all the cable types separate in your mind, and then remembering what theyre used for. This often occurs when a CCNA or CCNP candidate starts putting together their own home practice lab, and they suddenly realize that they have the equipment to run labs, but not the cables.
With this in mind, here are some common Cisco cable types and their primary use.
First, theres the regular old straight-through cable, so named because the eight wires inside the cable go straight through the wire. While the wires may be twisted inside to reduce electromagnetic interference (EMI), the wire thats connected to Pin 1 on one end is connected to Pin 1 on the other end, and so on. In a home lab, a straight-through cable is often used to connect a switch port to an Ethernet port on a router, with a transceiver attached to the Ethernet port. Straight-through cables are also good for connecting a BRI interface to an ISDN simulator.
The crossover cable is so named because the wires do cross over between pins. This allows the...
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