Category 5 cable
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Cat5 patch cable
Category 5 cable, commonly known as Cat 5, is an unshielded twisted pair cable type designed for high signal integrity. Category 5 has been superseded by the Category 5e specification. This type of cable is often used in structured cabling for computer networks such as Ethernet, although it is also used to carry many other signals such as basic voice services, token ring, and ATM (at up to 155 Mbit/s, over short distances).
Take a look at this helpful tutorial as well.
This simple, no nonsense guide, will teach you how to make a good Ethernet patch cord at a fraction of the price it would cost you to buy it pre-manufactured.
An RJ-45 Crimp tool with wire stripper (12$ at tigerdirect.com)
A box of RJ-45 Connectors (7.99 for 50 at tigerdirect.com)
A box of 500 ft. of Cat5e cable (Approximately 50/70$)
Or, even better, a complete kit with all of these accessories already included.