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Commonly abbreviated Local Area Network LAN is a computer network that covers only a small area networks, such as campus computer networks, buildings, offices, in homes, schools or smaller. Currently, most LANs based on the IEEE 802.3 Ethernet technology using a switch device, which has a data transfer speed of 10, 100, or 1000 Mbit / s. In addition to Ethernet, the current technology is 802.11b (or so-called Wi-Fi) is also often used to form a LAN. Places that provide LAN connectivity with Wi-Fi technology is commonly called a hotspot.
On a LAN, each node or computer has the computing power of its own, different from the concept of terminal dump. Each computer can also access resources on the LAN in accordance with the permissions that have been set. Such resources can be either data or devices such as printers. On a LAN, a user can also communicate with other users by using the appropriate application.
In contrast to Wide Area Networks or Wide Area Network (WAN), the LAN has the following characteristics:
1. Rapidly have higher data
2. Covers a narrower geographical area
3. Do not require leased telecommunication lines from the computer operator telekomunikasiBiasanya one of the computer's network server that will be used to manage all the systems in the network.


Excess LAN:
LAN can be connected in various ways such as pair cable, fiber optic, telephone cables, and infrared light, and radio signals. Configuring connectivity between multiple computers known as topology. Each topology needs to implement cooperation are commonly encountered in the network, a message from one computer to another computer or user in order to perform tasks that are stored in the network

LAN Disadvantages:
LAN can only connect a number of computers that are in a particular area such as a campus, in a building, and in a space that is often associated with a minicomputer. However, rarely LAN covers more area than a single building.