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 devices to both send and receive at the same time, and crossover cables are a must for directly connecting ports on Cisco switches to create a trunk.

The rollover cable allows you to connect directly to a Cisco console port with your laptop or PC. This is the blue cable that comes with new Cisco devices, and its the one that engineers tend to hold on to with their lives. Without a rollover cable (also commonly called a console cable), you cant connect your laptop directly to a Cisco device.

Finally, theres the DTE/DCE cable. To create a frame relay cloud in your home lab (using one of your Cisco routers as a DCE), or to directly connect two Cisco routers via their serial interfaces, you will need a DTE/DCE cable. Remember that the DCE interface will need to supply clockrate to the DTE interface.

The different cable types can be confusing when you first read about them, but after tearing down or building your home lab a few times, youll definitely have them straight come test day!

Best of luck in your lab and your exams,

Chris Bryant

CCIE #12933

Top Rated Products

cs_image_0

This muscle building program on this page will show you how to build a powerful, muscular new body in 12 weeks or less without fad[...]

cs_image_1

Microcap millionaires newsletter educate members on important aspects of the stock market, premium microcap stock picks for paid m[...]

cs_image_1

Microcap millionaires newsletter educate members on important aspects of the stock market, premium microcap stock picks for paid m[...]

cs_image_2

Finally, You Can Get The Credit You Deserve Without Hiring An Expensive Credit Repair Service. Remove Any Type Of Error Including [...]

cs_image_3

Powerful Team Statistics pages with detailed stats for over 60 leagues worldwide. Comprehensive Correct Score Manual so that you c[...]

cs_image_3

Powerful Team Statistics pages with detailed stats for over 60 leagues worldwide. Comprehensive Correct Score Manual so that you c[...]

cs_image_4

Start repairing laptops straight away while using free, substandard online material for guidance - which will inevitable result in[...]

cs_image_5

Discover the mysterious Campfire Effect that draws men like a moth to a flame. Learn How To Captivate A Man, Make Him Fall In Love[...]

cs_image_5

Discover the mysterious Campfire Effect that draws men like a moth to a flame. Learn How To Captivate A Man, Make Him Fall In Love[...]

cs_image_6

Traffic Xtractor Ultimate Is Something That You'll Be Able To Finally Generate As Much Free Traffic As You Want, With A Few Clicks[...]

cs_image_7

Learn to speak Jamaican from our audio lessons. Many of the words you find in the lessons are commonly used in Jamaica and in Jama[...]

cs_image_7

Learn to speak Jamaican from our audio lessons. Many of the words you find in the lessons are commonly used in Jamaica and in Jama[...]

cs_image_8

We Sell The Most Affordable Project Management Document Templates For The Civil Engineering And Construction Industry. Boost Your [...]

cs_image_9

The Lost Book of Remedies is helping Americans achieve curative self-sufficiency even in the darkest times by saving the lost reme[...]

cs_image_9

The Lost Book of Remedies is helping Americans achieve curative self-sufficiency even in the darkest times by saving the lost reme[...]