What is Computer network?
{{complex|date=January 2024}} A '''computer network''' is a group of two or more [[computer]]s that are linked together. Networks are usually used to share resources, to exchange [[Computer file|files]], or to communicate with others. [[Image:NETWORK-Library-LAN.png|thumb|Typical library network, in a branching tree map and controlled access to resources]] A network is a set of [[Node (networking)|nodes]] connected by communication links. A node can be a computer, printer, or any other device capable of sending or receiving data from or to the other node in the network.<ref>{{Cite web|url=http://www.geektonight.com/computer-network-definition-advantages-use/|title=Computer Network Definition, Advantages, Use|date=2019-04-24|website=Geektonight|language=en-US|access-date=2019-07-14}}</ref> Other [[Peripheral device|devices]] are often needed for the network to work correctly. These include [[hub]]s and [[switch]]es. Different kinds of network can be connected to each other with a [[router]]. In general, networks that use cables to connect can operate at higher speeds than those using [[wireless]] technology. Computers in a network can be near each other, or far. A [[LAN|Local Area Network]] (LAN) connects computers which are close together. Building a LAN is easier than connecting different networks (by a [[Wide Area Network]]). The largest Wide Area Network is the [[Internet]]. Computers can be part of several different networks. Networks can also be parts of bigger networks. The ''local area network'' in a small business is usually connected to the ''corporate network'' of the larger company. These connections may allow access to the ''Internet''. For example, a [[shop]] may use it to show [[merchandise]] on its [[Web site]] through a [[server|web server]], or to convert received orders into shipping instructions. A network must be connected with appropriate [[Computer hardware|hardware]]. This can be wired or wireless. For a simple LAN, computers, media and peripherals are sufficient. WANs (wide ar