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

2.3 Subnetting

Subnetting is the process of dividing a network into two or more logically addressable smaller networks. Given below are some of the advantages of subnetting a network:

  • The IP address space is in ever growing demand. It is important that assigned IP addresses are well utilized. Subnetting enables one to utilize assigned IP addresses optimally.
  • Subnetting minimizes unnecessary traffic. A router is used to route traffic between different subnets. This eliminates unnecessary flooding of network segments with packets destined for some other subnets.
  • Makes the network more manageable. For example, a Company, by allocating separate subnets to each department, can manage the whole network easily.
  • Improve security: When you subnet a larger network, each subnet is a mini network. Typical routing rules apply. This enhances the security of the overall network.

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