What is networks

A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications.

In other words A network is a collection of computers, servers, mainframes, network devices, peripherals, or other devices connected to allow data sharing. 

Types of Networks

The Network’s size can vary from connecting two computers inside a small room to lakhs of computers across the world. Different types of networks are

  1. Personal Area Network (PAN)
  2. Local Area Network (LAN)
  3. Metropolitan Area Network (MAN)
  4. Wide Area Network (WAN)
  5. Storage Area Network (SAN)
  6. System Area Network
  7. Enterprise Private Network (EPN)
  8. Virtual Private Network (VPN)
  9. Internet

Advantages of Networks :

  • Enables centralized applications hosting/data storage and users accessing it through LAN, MAN, WAN in a secure way.
  • Results in considerable cost saving thro centralized administration.
  • Provides Real-time information to users.
  • Ensures data integrity.
  • Enables business transactions, net banking across any geography.
  • Optimizes software license usage and resource utilization.
  • Provides a collaboration platform for employees and reduces travel cost.

Disadvantages of Networks :

  • Vulnerability to cyber-attacks due to the exposure of the network to the outside world.
  • Set up cost is huge.
  • Sensitive Data need to be encrypted and protected through the farewell.
  • The administration of networks poses a challenge due to their size and spread.

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