Difference between router and gateway ?

Question

I have a stringent requirement to configure a router at run time to change the route of data for set of IPs automatically not human intervention. And if it is possible then how much time it will take since there is a time constraint for the Data plane.

Answer 1

Router is an electronic device which is used to connect more network topologies(wan,man).
Gateway is a electronic device specially used for network enter into internet(gateway act as proxy or firewall).

Answer 2

Gateways regulate traffic between two dissimilar networks, while routers regulate traffic between similar networks. The easiest way to illustrate this point is through an example. Suppose you have a Windows 2000 network that’s using TCP/IP as its primary protocol. Because TCP/IP is also the primary protocol of the Internet, you could use a router to connect your network to the Internet. The router would ensure that:
· Traffic intended for the local network doesn’t bleed onto the Internet.
· Traffic residing on the Internet that’s not specifically intended for your network stays on the Internet.

Answer 3

A router is device connects two nodes based on routing tables which determiners the cheapest path between them while gateway is the node which connects two networks and works as a bridge. In both the cases these can be a physical device or logical node.

Answer 4

a gateway is a router which is chosen as the ultimate destination in a local network when the destination pointed out by a packet is not with in that subnet

by this it means it directs the packets from local network to external world