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  1. #1
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    Join Date
    Jan 2021

    What is Classless Inter-Domain Routing

    CIDR, also referred to as supernetting, assigns IP addresses to more efficiently distribute addresses.

    This replaced the previous system based on Class A, B, and C networks.

    When you have a group of IP addresses, itís called a block.

    CIDR blocks share the same prefix and contain the same number of bits.

    Supernetting is the combination of multiple connecting CIDR blocks into a larger whole, sharing a common network prefix.

    CIDR Block Characteristics

    IP addresses in blocks are continuous
    First address of a block is divisible by the number of addresses of a block
    Size of the block should be a power of 2
Parts of CIDR IP addresses

    Benefits of CIDR

    Reduces entries in the routing table
    Reduce wasted IP address space

  2. #2

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