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 Routing Basics 1.Router and it's functions Router : a networking device that discovers network topologies and forwarding packets Routing is like building maps and giving directions. It has to learn about the details of the potential destinations. So it collects information, which can be static, manual or dynamic.  Router has two main functions  -  Routing : Learn about the network through it's neighbours  -  Forwarding : Packet is forwarded between routers until it reaches it's destination 2. Router Architecture  -  IP routing table : a data table stored on a router mapping the surrounded network topology and routers.  -  IP forwarding table : a data table on network switches that uses MAC addresses to map the proper interface to which packet should be forwarded. 3. Routing protocol Basics  - Static routes Routes are configured by administrators There is a special route called default route. It is used to route packets that are not explicitly listed in the routing table. I