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What is a Router ?

Router 
-Router is a internetworking device which is used to connect two or, more different networks.
- Router operates on network layer of the OSI model.
-It consists of both hardware and software.software is used in router for path determination.
-When packet enters into a router ,Router has to read the header of each packet for addresses and compares that address with a table called Routing table .When router finds a match ,it sends packets to the destination.
-If router can't decide the destination Path ,at that time it does flooding(kind of broadcast).
-Router can do both forwarding and filtering. 
-In router,every port has its own broadcast Domain and separate collision domain.
-Router can be able to read both IP address and Mac address.

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