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Everything about Classless Inter-Domain Routing

Method for IP address allocation and routing

Classless Inter-Domain Routing is a method for allocating IP addresses for IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the previous classful network addressing architecture on the Internet. Its goal was to slow the growth of routing tables on routers across the Internet, and to help slow the rapid exhaustion of IPv4 addresses. Wikipedia →

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Subnet A subnet, or subnetwork, is a logical subdivision of an IP network. The practice of dividing a network into two or more networks is called subnetting.…
Classful network A classful network is an obsolete network addressing architecture used in the Internet from 1981 until the introduction of Classless Inter-Domain Routing…
IPv4 Internet Protocol version 4 (IPv4) is the first version of the Internet Protocol (IP) as a standalone specification. It is one of the core protocols of…
IP address An Internet Protocol address (IP address) is a numerical label, such as 192.168.1.1 or 2001:0db8:0000:0000:0000:8a2e:0370:7334, that is assigned to a device…
Private network In Internet networking, a private network is a computer network that uses a private address space of IP addresses. These addresses are commonly used for…
Multicast address A multicast address is a numerical identifier for a group of hosts in a computer network that are available to process datagrams or frames intended to…
IPv6 address An Internet Protocol version 6 address (IPv6 address) is a numeric label that is used to identify and locate a network interface of a computer or a network…
IPv6 Internet Protocol version 6 (IPv6) is the most recent version of the Internet Protocol (IP), the communications protocol that provides an identification…