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Define LAN and WAN

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Local Area Network (LAN)

  •  A LAN is a network that is used for communicating among computer devices, usually within an office building or home.  
  • LAN’s enable the sharing of resources such as files or hardware devices that may be needed by multiple users • • Is limited in size, typically spanning a few hundred meters, and no more than a mile. 
  • Is fast, with speeds from 10 Mbps to 10 Gbps. 
  • Requires little wiring, typically a single cable connecting to each device. 
  • Has lower cost compared to MAN’s or WAN’s. 
  • LAN’s can be either wired or wireless. Twisted pair, coax or fiber optic cable can be used in wired LAN’s.

Advantages of LAN :  

  • The data is transferred at an extremely faster rate in local Area Network. 
  • Local area network (LAN) provides higher security.

Disadvantages of LAN : 
  • Initial cost of installing local area network is quite high. 
  • Unauthorized user can access critical data of an organization in case LAN admin is not able to secure centralized data repository. 


Wide Area Network (WAN) 

  • A Wide Area Network is a network that extends over a large geographical area such as states or countries. 
  • WAN network system could be a connection of a LAN which connects with other LAN’s using Telephone line and radio waves. It is mostly limited to an enterprise or an organization.
  • A WAN is two or more LANs connected together. The LANs can be many miles apart. 
  • To cover great distances, WANs may transmit data over leased high-speed phone lines or wireless links such as satellites. 
  • Multiple LANs can be connected together using devices such as bridges, routers, or gateways, which enable them to share data. 
  • The world's most popular WAN is the Internet.
Advantage of WAN: 
  • WAN helps you to cover a larger geographical area. Therefore, business offices situated at longer distances can easily communicates. 
  • Contain devices likes mobile phones, laptop, tablet, computers, gaming consoles, etc.
Disadvantage of WAN : 
  • The initial setup cost of investment is very high. 
  • There are more errors and issues because of the wide’s coverages and the use of different technologies. 

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