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Troubleshooting Network Connectivity


Troubleshooting the Hub

The most common network hubs these days are designed to use twisted pair cabling. The most common type of twisted pair cable in use is Category 5 cable which may be referred to as The most common network hubs these days are designed to use twisted pair cabling. The most common type of twisted pair cable in use is Category 5 cable which may be referred to as 10Base-T or 100Base-T. Category 5 cable or "Cat 5" resembles phone cable, not coax cable. Coax cable is the type of cable that attaches to your TV.

10Base-T or 100Base-T. Category 5 cable or "Cat 5" resembles phone cable, not coax cable. Coax cable is the type of cable that attaches to your TV.

If your entire network is down, check your hub and see if it has power. If the hub has power you should see activity lights on the it. If there are no lights on the hub, check it's power cord. Is the power cord plugged in correctly? If it is, is there another power outlet close by you can plug the hub's power cord into? If not, do you have something else you can plug into that outlet to check the outlet? What we're trying to do here is establish whether or not the power outlet is dead. If the power outlet is dead, check your circuit breakers. If the power outlet is not dead you probably need to replace the hub or have it serviced.

If the problem is with a few users, trace the cable that runs from their computer to the hub. Is the port the cable is plugged into active? If it isn't, is there another port available? If there is, try plugging their cable into another port. If the computer works from another port, then more than likely you have a bad port on the hub.

Troubleshooting the Cable

If you don't have connectivity, you may have cable testing equipment, test the cable at this time. If you don't have cable testing equipment, take a cable from a working computer and plug it into the computer that is not working. If the computer now works, you've got a bad cable, replace it. If you are going to be supporting a large network, you may want to invest in cable testing equipment. Cable testing equipment is not very expensive and can save you a lot of time.


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