Addressing Glossary

Browse 4 addressing terms defined in plain English, from the cultural dictionary of computing.

4 Addressing Terms

CIDR
Classless Inter-Domain Routing — a method of allocating IP addresses and routing that replaced the wasteful Class A/B/C system. CIDR notation (e.g.,...
IPv4
The fourth version of the Internet Protocol, which uses 32-bit addresses written in dotted-decimal form such as 192.0.2.1. Its limited address space led to...
IPv6
The successor to IPv4, using 128-bit addresses written in hexadecimal groups such as 2001:db8::1. It vastly expands address space and includes protocol-level...
NAT
Network Address Translation — a technique where a router modifies IP addresses in packet headers to map between private (internal) and public (internet-facing)...

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