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4. HOST GROUP ADDRESSES Connected: An Internet Encyclopedia
4. HOST GROUP ADDRESSES

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4. HOST GROUP ADDRESSES

4. HOST GROUP ADDRESSES

Host groups are identified by class D IP addresses, i.e., those with "1110" as their high-order four bits. Class E IP addresses, i.e., those with "1111" as their high-order four bits, are reserved for future addressing modes.

In Internet standard "dotted decimal" notation, host group addresses range from 224.0.0.0 to 239.255.255.255. The address 224.0.0.0 is guaranteed not to be assigned to any group, and 224.0.0.1 is assigned to the permanent group of all IP hosts (including gateways). This is used to address all multicast hosts on the directly connected network. There is no multicast address (or any other IP address) for all hosts on the total Internet. The addresses of other well-known, permanent groups are to be published in "Assigned Numbers".

Appendix II contains some background discussion of several issues related to host group addresses.


Next: 5. MODEL OF A HOST IP IMPLEMENTATION

Connected: An Internet Encyclopedia
4. HOST GROUP ADDRESSES

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