| 释义 |
CIDR (Classless Inter-Domain Routing) An address assignment and aggregation strategy that allows multiple Internet Protocol version 4 (IPv4) Class C subnet address blocks to be grouped under a single address. Thereby, all addresses in those blocks can be routed to the same host. CIDR uses shorthand to specify the subnet mask, which is written in dotted decimal notation, as are the IPv4 addresses. CIDR reduces the number of routes to be learned and, therefore, reduces the size and complexity of the routing tables that the Internet switches and routers must support. CIDR is specified in RFCs 1518 and 1519. See also dotted decimal notation, host, Internet, IPv4, IPv4 address, router, subnet, subnet mask, supernetting, and switch. |