What is LAN Network? Advantages and Disadvantages of LAN

Local area network is the computer network that connects computers within the limited area such as schools, colleges or universities.

Local area networks, generally called LANs, are privately-owned networks. They provide a useful way of sharing resources between end users. The resources such as printers, file servers, scanners, and internet are easily sharable among other connected computers in a network.

Advantages of LAN

  1. Software Applications Sharing: In a Local Area Network, it is easy to use the same software in a number of computers connected to a network instead of purchasing the separately licensed software for each client a network.
  2. Resource Sharing: LAN provides resource sharing such as computer resources like printers, scanners, modems, DVD-ROM drives, and hard disks can be shared within the connected devices. This reduces cost and hardware purchases.
  3. Data Security: Since data is stored on the server computer, it will be easy to manage data at only one place and the data will be more secure too.
  4. Easy and Cheap Communication: Data and messages can easily be shared with the other computer connected to the network.
    Centralized Data: The data of all network users can be stored on a hard disk of the central/server computer. This help users to use any computer in a network to access the required data.
  5. Internet Sharing: Local Area Network provides the facility to share a single internet connection among all the LAN users. In school labs and internet Cafes, single internet connection is used to provide internet to all connected computers.

Disadvantages of LAN

  1. High Setup Cost: The initial setup costs of installing Local Area Networks is high because there is special software required to make a server. Also, communication devices like an ethernet cable, switches, hubs, routers, cables are costly.
  2. Data Security Threat: Unauthorised users can access important data of an office or campus if a server hard disk is not properly secured by the LAN administrator.
  3. LAN Maintenance Job: Local Area Network requires a LAN Administrator because there are problems such as software installations, program faults or hardware failures or cable disturbances in Local Area Network. A LAN Administrator is required to maintain these issues.
  4. Privacy Violations: The LAN administrator can see and check personal data files of each and every LAN user. Moreover, he can view the computer and internet history of the LAN user.
  5. Covers Limited Area: LANs are restricted in size they cover a small area like a single office, single building or a group of nearby buildings.

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