What are Public and Private networks?

  • A public network is one that is accessible via. the Internet. That means that computers/nodes of a public network are reachable from any computer that has connectivity to the Internet.
  • Computers on a public network would use the TCP/IP suite of protocols for communication.
  • A private network is one that is hidden from the public Internet and hence computers/nodes of a private network are inaccessible to computers that are not part of the private network. Examples are: Enterprise networks, defence networks etc.
  • Computers inside a private network need not necessarily use only the TCP/IP set of protocols. They can have their own set of protocols, as long as all the nodes of the private network can understand the same.

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