Reserved IP Addresses
In the Internet addressing architecture, the Internet Engineering Task Force (IETF) and the Internet Assigned Numbers Authority (IANA) have reserved various Internet Protocol (IP) addresses for special purposes. These IP addresses may be used for maintenance of routing tables, multicast, operation under failure modes, or to provide addressing space for public, unrestricted uses.
The IETF sets the guidelines for use of the IP address space in RFC specifications, and directs IANA to implement the policies. Reserved IP addresses tend to belong to three categories: addresses that are globally unique, addresses that are unique to the subnet, and addresses that are only relevant to the host using the address.
Read more about Reserved IP Addresses: Reserved IPv4 Addresses, Reserved IPv6 Addresses
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