Computer Terms: LAN, WAN, MAN, HAN, CAN, VPN

In LAN or LAN computer science, arbitrary devices can interact with other devices on the network, as computers and other groups of devices are distributed over a relatively limited area and connected via a communication link . A LAN typically includes shared (usually expensive) resources such as microcomputers and laser printers and large hard drives. Most modern LANs can support various computers and other devices. Each device must use the appropriate physical and data link protocols for the specific LAN and all devices that wish to communicate with each other on the LAN must use the same upper layer communication protocol.

"Network" is a generic name for any computer-based communication system that links many computers and other devices together. The network may be referred to as a LAN (Local Area Network) or WAN (Wide Area Network). A LAN is a network that connects multiple devices in a well-defined area, typically one building or a group of adjacent buildings, through one cable system. WAN, on the other hand, is a network for distributing data around sites that may be dispersed throughout the country or around the world.

WAN, also known as WAN, is a set of geographically single LANs. It usually covers a wide range of computer networks. The router connects a different LAN to the WAN. For example, most WANs (such as the Internet) do not belong to any organization or group, but they are operating under joint ownership or assigned ownership and management. Every device is connected to a central device called a hub. All the data transferred from one computer to another is inexpensive and easy to install, so it is commonly used on a LAN via a hub. Tree topology is an extended form of star topology for large scale networks. This type of network greatly reduces the traffic on the line by sending packets only to the lines of the destination host.

The network switch is a LAN / WAN communication device. Connect multiple computers with LAN and WAN. On a LAN, the switch does not broadcast data to all connected computers, such as hubs. Depending on the computer's IP / MAC address, the switch sends data only to the target computer. The switch operates at the data link and network layer of the OSI layer model. Switches of different models support different numbers of connected devices. On the LAN, the switch supports data transfer rates of 10 mbps, 10/100 mbps or 100 mbps. The switch saves bandwidth and provides better performance than a hub