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Classless Inter-Domain Routing
(redirected from IP prefix)

    Also found in: Wikipedia 0.01 sec.
(networking)Classless Inter-Domain Routing - (CIDR) /sid*r/ A technique that summarises a block of Internet addresses in a routing table as an address in dotted decimal notation followed by a forward slash and a two-digit decimal number giving the number of leading one bits in the subnet mask. For example, 123.123.123.0/24 specifies a subnet mask of 11111111.11111111.11111111.00000000 (binary), implying the block of addresses 123.123.123.0 through 123.123.123.255.

CIDR is "classless" because it is not limited to the subnet masks specified by Internet address classes A, B and C.

According to RFC 1519, CIDR was implemented to distribute Internet address space more efficiently and to provide a mechanism for IP route aggregation. This in turn reduces the number of entries in IP routing tables, enabling faster, more efficient routing, e.g. using routing protocols such as OSPF. CIDR is supported by BGP4.

See also RFC 1467, RFC 1518, RFC 1520.
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Examples of specific topics address include real-time identification of IP prefix hijacking, cryptanalysis of a cognitive authentication scheme, network flow watermarking attacks on low-latency anonymous communication systems, usable mandatory integrity protection for operating systems, using rescue points to navigate software recovery, optimal communication complexity of multiphase protocols for perfect communication, and multi-dimensional range query over encrypted data.
Security and privacy; proceedings by SciTech Book News
When making routing changes, a route-optimization solution has the option of rerouting traffic at both the AS level and at the IP prefix level.
Improve IP VPN performance. (Virtual Private Networks) by Hecht, Howie / Health Management Technology
 
 
 
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