Routing, in essence, is the act of finding a path from one place to another on w

Question

Routing, in essence, is the act of finding a path from one place to another on which a packet can travel. To find this path, we need algorithms. They will generally be distributed among many routers, allowing them to jointly share information. Routing is said to contain three elements:

Routing protocols, the things that allow information to be gathered and distributed
Routing algorithms, to determine paths
Routing databases to store information that the algorithm has discovered. The routing database sometimes corresponds directly to routing table entries, sometimes not.
Why this so important?

Explanation / Answer

Routing includes directly atached subnets and indirect subnets which are not connected to that router but can be accessed through one or more hops. If the subnet connets directly to the router then the routing database corresponds directly to the routing table entries.

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