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Thread: Using Different Subnet Masks with IP Classes ?

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    Question Using Different Subnet Masks with IP Classes ?

    Good Day Everyone!

    So I know the basics of Subnetting pretty much that each Class have their own default Subnet Mask and Identifying the host Network etc, but I always wonder if there are any Advantages\Disadvantages of using different Subnet Masks with IP Classes. eg: Class A 10.0.0.1 using Subnet Masks 255.255.255.0 ?
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    I use class A IPs with incorrect subnets all the time. Never really had issues. One of the things that the subnet really does is limit the number of IPs available. So....for example. 255.255.255.252 will allow only 2 users on the network.

    https://serverfault.com/questions/87...rs-on-a-router

    That may explain it a bit better. The MAIN reason I can think of with using the proper class/subnet is to adhere to auditing. If you've got a home or small business then it really doesn't matter.
    Knowing the solution doesn't mean knowing the method. Yet answering correctly and regurgitation are considered "learning" and "knowledge".

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    Thanks for replying and for your Insightful thoughts on the matter, my thoughts Exactly! just get a little paranoid sometimes when it comes to network security ...Lol!
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    It is best practice to use the private IP Classes for LANs. As Khat said the mask is mainly to dictate the amount of host available for a particular subnet.
    It is good to keep track of what is being used where however.
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    Quote Originally Posted by BNOVA View Post
    It is best practice to use the private IP Classes for LANs. As Khat said the mask is mainly to dictate the amount of host available for a particular subnet.
    It is good to keep track of what is being used where however.
    Agreed. Thanks for adding that for clarity. Always document your stuff.

    https://www.howtoforge.com/ip-management-with-phpip
    Knowing the solution doesn't mean knowing the method. Yet answering correctly and regurgitation are considered "learning" and "knowledge".

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    Quote Originally Posted by BNOVA View Post
    It is best practice to use the private IP Classes for LANs. As Khat said the mask is mainly to dictate the amount of host available for a particular subnet.
    It is good to keep track of what is being used where however.
    Thanks for the info and replying ...
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