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IP addresses...

  • 11-08-2009 2:54pm
    #1
    chezzer
    Closed Accounts Posts: 184 ✭✭


    Hi,

    Regarding IP (IPv4) addresses and classes, I know Class A first octet 0-127,
    B 128-191 (?)
    C 191-255 ...

    But arent the A + B IP addresses restricted to a certain "domain" ?

    Class A is local , Class B is like a WAN , whereass Class C is internet ?


Comments

  • #2
    Verres
    Registered Users, Registered Users 2 Posts: 223 ✭✭Verres


    It's a bit complex. Just Google "IP address classes" - there's loads of links that explain how it works.


  • #3
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,757 CMod ✭✭✭✭Spear


    chezzer wrote: »
    Hi,

    Regarding IP (IPv4) addresses and classes, I know Class A first octet 0-127,
    B 128-191 (?)
    C 191-255 ...

    But arent the A + B IP addresses restricted to a certain "domain" ?

    Class A is local , Class B is like a WAN , whereass Class C is internet ?

    For the official answer see RFC 1918.

    http://tools.ietf.org/html/rfc1918


  • #4
    chezzer
    Closed Accounts Posts: 184 ✭✭chezzer


    OK, so its not Strict that a class c address is restricted to a small network ??

    just as a class A doesn't need to be (allthough probably is regulated) a 'internet' - for want of a better term .. uniquelly identifiable address ?


  • #5
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,757 CMod ✭✭✭✭Spear


    chezzer wrote: »
    OK, so its not Strict that a class c address is restricted to a small network ??

    No, supernetting/CIDR has done away with that.

    http://en.wikipedia.org/wiki/CIDR
    http://en.wikipedia.org/wiki/Supernet
    just as a class A doesn't need to be (allthough probably is regulated) a 'internet' - for want of a better term .. uniquelly identifiable address ?

    Other than the private restricted ranges, 10.x.x.x etc, they should be.


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