whatis a node (or a device) that connects two different networks together and allows them to communicate.

Router

Explanation:

A router can be defined as a network device that is designed typically for forwarding data packets between two or more networks based on a well-defined routing protocol.

Hence, a router is a node (or a device) that connects two different networks together and allows them to communicate.

Generally, routers are configured using a standard routing protocol with an IP address as the default gateway.

A routing protocol can be defined as a set of defined rules or algorithms used by routers to determine the communication paths unto which data should be exchanged between the source router and destination or host device.

Additionally, in order for packets to be sent to a remote destination, these three parameters must be configured on a host.

I. Default gateway

II. IP address

III. Subnet mask

After a router successfully determines the destination network, the router checks the routing table for the resulting destination network number. If a match is found, the interface associated with the network number receives the packets. Else, the default gateway configured is used. Also, If there is no default gateway, the packet is dropped.

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