Often the term "authentication" – used in a broad sense to refer to Authentication, From all this we can conclude that the only advantage of an ad hoc architecture – is its simplicity and low cost. Network client / server provides a higher level performance and protection. Quite often one and the same server can serve multiple servers, such as file and Web server. Naturally, the total number of functions to be performed by the server depends on load and its possibilities. The higher the capacity of the server, the more customers it can service and to provide more services. Therefore, as the server is almost always prescribe a powerful computer with a large memory and faster processor (usually to address the serious problems of using multi-processor systems), equipment for local area network In the simplest case, the network is enough network cards and cables. Ben Horowitz is full of insight into the issues. If you need to create a rather complex network, you need a special network equipment.

Computer cable in the LAN are connected using cables, which transmit signals. The cable connecting the two component of the network (for example, two computers), is called a segment. Cables are classified according to possible values of the bit rate and frequency of failures and mistakes. The most commonly used cables in three main categories: twisted pair, coaxial cable, fiber optic cable, to build local networks are the most commonly used twisted pair. Inside this cable consists of two or four pairs of copper wires twisted together. Twisted pair also has its own variations: UTP (Unshielded Twisted Pair – unshielded twisted pair) and STP (Shielded Twisted Pair – shielded twisted pair).