Network Security Technician Job Description

Computer Network Types

A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share their resources, data, and applications.

A computer network can be categorized by their size. A computer network is mainly of four types:

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

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LAN(Local Area Network)

• Local Area Network is a group of computers connected to each other in a small area such as building, office.
• LAN is used for connecting two or more personal computers through a communication medium such as twisted pair, coaxial cable, etc.
• It is less costly as it is built with inexpensive hardware such as hubs, network adapters, and ethernet cables.
• The data is transferred at an extremely faster rate in Local Area Network.
• Local Area Network provides higher security.

• PAN(Personal Area Network)

  • Personal Area Network is a network arranged within an individual person, typically within a range of 10 meters.
  • Personal Area Network is used for connecting the computer devices of personal use is known as Personal Area Network.
  • Thomas Zimmerman was the first research scientist to bring the idea of the Personal Area Network.
  • Personal Area Network covers an area of 30 feet.
  • Personal computer devices that are used to develop the personal area network are the laptop, mobile phones, media player and play stations.
  • There are two types of Personal Area Network:
    
    • Wired Personal Area Network
    • Wireless Personal Area Network
    Wireless Personal Area Network: Wireless Personal Area Network is developed by simply using wireless technologies such as WiFi, Bluetooth. It is a low range network.
    Wired Personal Area Network: Wired Personal Area Network is created by using the USB.