Local area networking is criticalstep in wiring the office and factory. By properly planning your network, you can create a system that links a group of different or incompatible computers and accessories within one office, an entire building, or a group of buildings. In itssimplest form, a locql area network utilizes standard cableing which actsas an electronic highway for transporting information to and from different computers in the same office area.

Local area network systems (LANs) have emerged as a key development as society progresses into the "information age". Lans provide for the integration of computer and communication technologies to meet the demande for efficient information (or data) processing, handling, collection and distribution. LANs fulfill their function throughout a local region without using public telephone, microwave, or satellite links.

Regardless of the LAN topo;ogy, cabling is thje key element which provides for distribution and communication throughout the network. Coaxial, fiber optic, and twisted pair cables are utilized. They may be used to fulfill the trunk cable distribution and drop cable node/work station attachment functions indicated.

Choice of coaxial, fibre optic, or twisted pair cable isa made after a careful study ao system data speed and electrical requirements. Electrical characteristics of concern are impedance, return loss, attenuation, near end and far end crosstalk, velocity of propagation, and sheild transfer impedence.