‘N’ – Networking

Today, I shall talk about a very important topic – Networking. In this post, I am going to talk about the A2Z of networking. In computer science, networking is the practice of exchanging data over a medium. The process of exchanging data between a source and a receiver is also called Data communication. The device that transmits data is known as the source and the device that receives the data is called the receiver. A data communication system has the following components:

  1. Message: This is the data or the information to be communicated. It may contain text, audio/visual or both.
  2. Sender: It is the device that generates and sends the message.
  3. Receiver: It is the device that receives the message.
  4. Medium: It is the path between the sender and the receiver.
  5. Protocol: It is the set of rules that govern the communication between the devices. Both the sender and the receiver must follow the same protocol to communicate with each other.

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A2Z of Networking – Transmission Media

Transmission media is the physical path through which the message is transmitted from the sender to the receiver. There are two types of transmission media: Guided and Unguided.

Guided Media consists of:

  • Twisted Pair Cable: There are two types of twisted pair cables:
    • Unshielded Twisted Pair – Used in setting up LAN and telephone connections
    • Shielded Twisted Pair cable
  • Coaxial Cable – Used in setting up DTH connection
  • Fibre Optics – Used in setting up Fibre connections to provide high-speed internet services.

a2z-of-networkingUnguided Media consists of:

  • Satellite Communication
  • Radio Transmission
  • Microwave

A2Z of Networking – Types of Network

A computer network is a system for communicating between two or more computers. Computer networks can be classified according to their size:

  • Local Area Network (LAN) connects computers in a single building, block or campus.
  • Metropolitan Area Network (MAN) is a bigger version of LAN as it generally covers towns and cities.
  • Wide Area Network (WAN) is a bigger version of WAN as it covers a large geographical area (states, countries, continents).
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