Network+ Tutorial

2.0 Protocols and standards

  1. Layers of OSI
  2. MAC Address
  3. Subnetting
  4. Public and Private Networks
  5. TCP/IP Protocols
  6. Network Utilities

2.4 Public and private networks:

Public networks are those that comply with regional government regulations, and protocol standards. These are normally open to Corporates and general public for use. One example of a public network is the Telcos that operate telephone network. Another example of public data network is the Internet.

Private networks are normally limited to a compound. Several Corporates implement private networks using public networks. Technologies like leased lines, and virtual private networks enable implementation of private wide area networks (private WANs).

Public IP networks should use valid IP address range, whereas private networks may use private/public ip address range. By using a public address range, a Company may seamlessly integrate the Corporate network with public network. However, by using private address range, it is possible to integrate with public network by using proxy servers. A proxy server translates IP addresses according to a given set of rules.

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