Number of subnets in CIDR


  1. Posts : 126
    Microsoft Windows 7 Professional 64-bit
       #1

    Number of subnets in CIDR


    In CIDR, there is no such concept as "number of subnets created" right ? As CIDR subnetting seems to be based on allocating a range of IP addresses instead.
      My Computer


  2. Posts : 2,298
    Windows 7 Professional x64 SP1 ; Windows Server 2012 R2 Standard
       #2

    Raynian said:
    In CIDR, there is no such concept as "number of subnets created" right ? As CIDR subnetting seems to be based on allocating a range of IP addresses instead.
    Naa, CIDR notation is just a way if showing the subnet mask on a particular subnet. Some people often call it variable length subnet masking where you use a subnet mask that is different from the default.

    For example for a class C address like 192.168.1.0 I can use CIDR or VLSM to subnet it further into two different networks of 126 hosts each rather than having the default 254 hosts.

    For example :

    Classful (Default) - 192.168.1.0/24

    Classless (VLSM/CIDR) - 192.168.1.128/25

    It's still subnetting, just a fancy name as far as I am aware

    Hope this helps,
    Josh :)
      My Computer


 

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