IPv6 Glossary

Use this handy clickable, printable guide for definitions relating to IPv6.

Directions: Click on each term to read our complete definition.

anycast -- In Internet Protocol Version 6 (IPv6), anycast is communication between a single sender and the nearest of several receivers in a group.

care of address -- In Internet routing, a care-of address is a temporary IP address for a mobile node (mobile device) that enables message delivery when the device is connecting from somewhere other than its home network.

foreign network -- In the Mobile Internet Protocol (Mobile IP), a foreign network is any network other than the home network to which a mobile device may be connected.

Hierarchical MIPv6 (HMIPv6) -- the proposed enhancement of Mobile Internet Protocol versions 6 (MIPv6) that is designed to reduce the amount of signaling required and to improve handoff speed for mobile connections. HMIPv6 is a proposed standard from the Internet Engineering Task Force (IETF).

home address -- In the Mobile Internet Protocol (Mobile IP), a home address is the relatively permanent IP address given to a mobile node. The home address remains unchanged no matter where the mobile node is located.

home agent -- In Mobile Internet Protocol (Mobile IP), a home agent is a router on a mobile node's home network that maintains information about the device's current location, as identified in its care-of address.

Internet Engineering Task Force (IETF) -- the body that defines standard Internet operating protocols such as TCP/IP.

Internet Protocol (IP) -- the method or protocol by which data is sent from one computer to another on the Internet.

IP addresses -- In the most widely installed level of the Internet Protocol (IP) today, an IP address is a 32-bit number that identifies each sender or receiver of information that is sent in packets across the Internet. (NOTE: This definition is based on Internet Protocol Version 4. See Internet Protocol Version 6 (IPv6) for a description of the newer 128-bit IP address.)

IPv6 -- the latest level of the Internet Protocol (IP) and is now included as part of IP support in many products including the major computer operating systems.

ISP -- a company that provides individuals and other companies access to the Internet and other related services such as Web site building and virtual hosting.

Mobile IPv6 -- protocol developed as a subset of Internet Protocol version 6 (IPv6) to support mobile connections.

mobile nodes -- an Internet-connected device whose location and point of attachment to the Internet may frequently be changed.

multicast -- communication between a single sender and multiple receivers on a network.

NAT -- the translation of an Internet Protocol address (IP address) used within one network to a different IP address known within another network.

packets -- the unit of data that is routed between an origin and a destination on the Internet or any other packet-switched network.

QoS -- On the Internet and in other networks, QoS (Quality of Service) is the idea that transmission rates, error rates, and other characteristics can be measured, improved, and, to some extent, guaranteed in advance.

subnet -- an identifiably separate part of an organization's network. Typically, a subnet may represent all the machines at one geographic location, in one building, or on the same local area network (LAN).

TCP -- a set of rules (protocol) used along with the Internet Protocol (IP) to send data in the form of message units between computers over the Internet.

tunnels -- the transmission of data intended for use only within a private, usually corporate network through a public network in such a way that the routing nodes in the public network are unaware that the transmission is part of a private network.

unicast -- communication between a single sender and a single receiver over a network.

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