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  • #2307141

    IP address class

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    by nicole_howard ·

    Hello,

    Would the IP address 224.0.0.0 considered a part of class C?

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    • #3521111

      No, it’s a reserved Multicast address.

      by thamer ·

      In reply to IP address class

      Background:
      The first byte of an IP address identifies which of the three network classes that address belongs to. The ranges for that first byte are as follows:

      Class A: 1 to 126 (1.h.h.h to 126.h.h.h)
      Class B: 128 to 191 (128.n.h.h to 191.n.h.h)
      Class C: 192 to 223 (192.n.n.h to 223.n.n.h)

      Where n represents the network address and h represents the host address.

      They range from 224.0.0.1 to 239.255.255.255 are called Multicast addresses and are used to send packets to a group of hosts or routers.

      Addresses in the range from 224.0.0.0 to 224.0.0.255 (224.0.0.0/24) are reserved Multicast addresses for the local subnet and are not forwarded by IP routers regardless of the Time to Live (TTL) in the IP header.

      For a list of these reserved Multicast addresses check the following page
      http://www.freesoft.org/CIE/RFC/1700/5.htm
      (Eliminate spaces from the URL name when you cut and paste)

      So to answer your question, 224.0.0.0 is not a class C address… it is a reserved Base Address for the use of routing protocols and other low-level topology discovery or maintenance protocols.

      I hope you find this … helpful.

    • #3521413

      IP Address Class…

      by vze393zf ·

      In reply to IP address class

      Hi.
      The answer to your question is NO. That address range is reserved for Class D, and is only used for preallocated for use with IP Multicast applications. Click here to learn more about IP address class breakdowns.

      http://www-3.ibm.com/software/network/commserver/library/publications/csaix_60/dzgl1m41.htm

      And link to here for information regarding IP Multicasting basics.

      http://216.239.33.100/search?q=cache:SPbaMGbjeMYC:www.microsoft.com/usa/presentations/Multicast_Basics_(handout).doc+IP+Multicast+Address+Range&hl=en&ie=UTF-8

      Regards,

      Pete

    • #3385774

      No, Class C – 191-223

      by cmike241 ·

      In reply to IP address class

      No, Class C – 191-223

      Mike Carney
      mcs-connect.com

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