CIDR

Background and History of CIDR CIDR (Classless Inter-Domain Routing) was introduced by the IETF in 1993 through RFC 1517, RFC 1518, and RFC 1519. It later became the internet routing standard with the publication of RFC 2050 in 1998. It was created to address two major problems in the older class-based IP allocation model. First, Class C networks with 254 hosts were often too small, while Class B networks with 65,534 hosts were far too large, which led to heavy address waste. Second, internet routing tables were growing rapidly and putting pressure on router memory and processing capacity. ...