In linguistics and grammar, a pronoun is a word that substitutes for a noun or noun phrase. It is a particular case of a pro-form.
IP Routing is an umbrella term for the set of protocols that determine the path that data follows in order to travel across multiple networks from its source to its destination. Data is routed from its source to its destination through a series of routers, and across multiple networks.
There are two main types of algorithms for IP (Internet protocol) routing: distance vector and link state. The former determine best path on the basis of how far the destination is, typically in terms of the number of hops to the destination.