Whereas wireless networking is the newest leap in technology, many networks still remain wired, mainly due to the speed and security of wired connectivity.
Wired connections can be set up through an Ethernet crossover cable which can directly connect two devices of the same kind (it is often used to network devices for a short period of time when routers, hubs or switches are unavailable).
Cross over cables are capable of reversing the sending and receiving signals. Bear in mind though that Ethernet crossover cables should only be used for direct network connections. If you attempt to use this to connect to a hub you will fail to get a functioning network link. However broadband routers are equipped to sense these cables and allow them to work with Ethernet devices.
Another way of wiring a network can be through CAT5 cabling. Cat 5 is the fifth generation of twisted pair Ethernet cabling, and the most popular one these days. Made up of four copper wires, it is limited to a length of 100 meters. A newer version the CAT5e is designed to bear networking at gigabyte Ethernet speeds upto 1000mpbs (over short distances).
There are two types of CAT5 cables, solid or stranded. Whereas solid works well for longer lengths and fixed wiring configurations, the stranded cables is more flexible and better for short distances and is also more movable (patchable cabling).