4.6 Local Area Networks
Local Area Networks with transmission rates ranging between 10 Mbps and 10 Gbps belong among medium-speed networks. The aim of the LAN is to interconnect computers (and other communication appliances such as routers) within one or several buildings in a campus so they can mutually communicate. When using optical cables, the LAN can cover several miles.
Many different LAN systems have been developed over the last few years, although, just two of them have become more widespread: Ethernet and, to a lesser extent, the FDDI. (You can also come across the Token Ring system by IBM, but this usually applies only to users that are fully equipped with IBM appliances.)
In order to connect a computer to the LAN, we have to insert the appropriate network card first. The LAN link protocols are partially executed directly in the network card.
The LAN comprises of the following parts:
- Cabling belongs to the physical layer.
- Network cards are inserted into computers and other devices...
