Types of LANs

By the categories, there are three common types of LANs. Dedicated server LANs account for more than 70 percent of all installed LANs.

• Dedicated Server Networks: A dedicated server LAN can connect with almost any other network, can handle very large databases, have a dedicated network server, and uses sophisticated LAN software. Moreover, high-end dedicated server LANs can be easily interconnected to form enterprise-wide networks or, Sometimes, replace the host mainframe central computer. Generally speaking, the dedicated server is a powerful microcomputer.
  Three software components must work together and with the network hardware to enable communications: the network operating system (NOS) in the dedicated server, the network communication software that interconnects the server to the user computers, and the application software that runs on the server and client computers. Four common types of dedicated server LANs are file servers, database servers, print servers, and communication servers.

• Peer-to-Peer Networks: This network is a local area network that allows all users access to data on all workstations. In this networks, any computer can perform as both a client and a server. Each computer on the network shares its resource such as hard disk and printer with any other computer on the same network.
  This network is usually slower, has less capability, supports a limited number of computers, provides less sophisticated software, and is more difficult to manage than dedicated server LANS. However, this LAN uses cheaper computers and programs. Examples of peer-to-peer LANs include Artisoft's LANtastic, Novell's NetWare Lite, and Windows for Workgroups.

• Zero-Slot LANs: This LAN operates like peer-to-peer LAN, but offers limited, simple abilities such as sharing files and printers one another, transfer files, and transmit e- mail. It is inexpensive. It does not require a network interface circuit card. Its adapter plug can be plugged into a serial or parallel port. This network usually can handle up to 30 computers.