It

is one of a family of IP Routing protocols, and is an Interior Gateway Protocol

(IGP) for the Internet.

It is a set of rules

that determine the best network routes for data transmission on the internet.

It is an infrastructure component that provides

messaging and data storage functionality for other OpenDaylight components

based on user-defined data and interface

It is acts like a large registry of services

advertised by various modules and binds them to the applications that require

them.

It is used to complete

or break an electric circuit in order to use an switching appliance.