IP Address
An IP address is the numerical label that identifies a device's network interface on an IP network, so that data can be routed to it.
What is IP Address?
IPv4 addresses are 32 bits, written as four decimal numbers (e.g. 192.0.2.1), giving about 4.3 billion addresses, now exhausted. IPv6 addresses are 128 bits, written in hexadecimal (e.g. 2001:db8::1). A subnet mask or prefix length shows which bits identify the network. IPv6 has special types including link-local addresses (fe80::/10, used only on the local link) and unique local addresses (fc00::/7, private). Many networks run dual stack, with IPv4 and IPv6 together, preferring IPv6 where possible.