Ethernet:
The most popular network type for both home and business is Ethernet.
Ethernet is fastest of the network types and can be the least expensive.
Ethernet networks are very stable and your network speed will never fluctuate
or be prone to interference like other network types are. Ethernet requires
special cables running from each computer. These cables are plugged into
a central 'ethernet hub' or 'switch'. If your computers are far apart,
running cable in an existing home may be difficult. Pre-made ethernet
cables come in sizes ranging from 3 feet to 50 feet. Ethernet adapters
come in many shapes and sizes, but PCI Ethernet cards are both the fastest
and least expensive.
Ethernet can operate at 10Mbps or 100Mbps. When shopping for ethernet equipment, be sure to look for 100Mbps or 10/100Mbps equipment. 10Mbps equipment is older and slower than the 10/100Mbps equipment and the price difference has become negligible. Note, older 10Mbps equipment will work just fine on 10/100Mbps networks.
If only two computers are being connected, a single crossover cable can be used instead of the standard cables + switch method.
LAN - Local Area Network. Computers are situated within a localised area or office.
WAN - Wide Area Network. Computers are located over distance e.g. different branches or international offices.