There are many types of networks, which are used for various purposes by different personnel and organizations. The different types of networks are:

• Metropolitan Area Networks (MAN)
  Metropolitan area networks are networks that stretch across a region the size of a metropolitan area. A MAN is a series of connected LANs in a city, which might also connect to a WAN.

• Enterprise Private Networks
  An enterprise private network is used by a company to connect its various sites so that the different locations can share resources.

• Internetworks
  Internetworks connect different networks together to build a larger network. Internetworking is often used to describe building a large, global network.

• Backbone Networks (BBN)
  A backbone is a part of a network that connects different devices and provides a path for information to be exchanged.

• Global Area Networks (GAN)
  A global area network is a worldwide network that connects networks all over the globe, such as the internet.

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