Network and types of computer network

  1. Computer Network – Introduction, Data Communication, Needs of Computer Networks, Advantages & Disadvantages of Network, Network Terminology, Node, Workstation, Server, Types of Server, Dedicated and Non-Dedicated Server, NIC, MAC Address, and IP Address
  2. Types of network: LAN, MAN, WAN, PAN, LAN vs WAN
  3. Networking Devices: Modem, Hub, Repeater, Switch, Bridge, Gateway
  4. Network Topology: Point to Point, Bus, Star, Ring, Mesh, Hybrid

Types of Network

Network / Computer Networks: The collection of interconnected computers is called a computer network.

On the basis of geographical distance, there can be four types of networks.

  • Local Area Network (LAN)
    • Wired LAN
    • Wireless LAN
  • Metropolitan Area Network (MAN)
  • Wide Area Network (WAN)
  • Personal Area Network (PAN)
    • Wired PAN
    • Wireless PAN


  • A local area network (LAN) is a network that connects computers and devices in a limited geographical area such as a home, school, computer laboratory, office building, or closely positioned group of buildings. Each computer or device on the network is a node.
  • It is generally a privately owned network over a distance up to 1 to 3 km.
  • Local Area Network (LAN) users can share data, information, programs, printers, hard disks, modems, etc.
  • Generally in LAN, one computer is work as the file server. It stores the software that controls the network.
  • On LAN’s, cables are used to connect the NIC in the computer.


  • The network spread across countries or on a vary big geographical area (such as a city, country, or spans even intercontinental distances ) are known as WANs.
  • A Wide Area Network (WAN) is a group of computers that are separated by large distances and tied together.
  • A WAN often uses transmission facilities provided by common carriers, such as telephone companies.
  • WAN technologies generally function at the lower three layers of the OSI reference model: the physical layer, the data link layer, and the network layer
  • WAN facilitates a fast and efficient exchange of information at lesser costs and higher speeds.
  • INTERNET is the largest WAN.


  • MAN refers to a network that is spread over an area as big as a city.
  • Multiple networks that are connected within the same city to form a citywide network for a specific government or industry
  • Any network bigger than a LAN but smaller than a wide area network (WAN).


  • A Personal Area (PAN) is a computer network used for communication among computers and different information technological devices close to one person.
  • Devices that are used in a PAN are personal computers, printers, fax machines, telephones, PDAs, scanners, and even video game consoles.
  • A PAN may include wired and wireless connections between devices.
  • The reach of a PAN typically extends to 10 meters

Local Area Network vs. Wide Area Network

(LAN vs. WAN)

  • LAN is spread over a small area, while WAN is spread over a large area.
  • The cost of LAN is lower than WAN.
  • LAN is a single network while WAN is usually a network of many networks.

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