Router is a layer 3 (Network layer) device use to enable communication between two different Networks and to route data from one network to another. Suppose there are different branches of a particular Bank in different Cities. Now if we need all the branches of bank to communicate with each other then routers are used to connect one branch to another with the use of Cables known as lease lines.
Now Cisco became the standard company for the Routers because of its high quality devices and their services. In this world about 80% of the networking companies uses the Routers of Cisco. The following is the image of Cisco Router.
Functions of Router
Router by default blocks the broadcast domain. Now if we want to enable broadcast domain from router than we need to configure it accordingly. And also Router blocks collision domain as well. Routers are used for creating WAN(Wide Area Network). Routers are connected with serial ports with each other for WAN connections.
Routers are used to monitor router traffic. Also its Firewall of the Router is use to filter the data that transfers from the data. Various software's such as Router Monitoring Software are available from which we can know what is bandwidth of your Network.
The Main Function’s of Router are as follows:
- Packet Switching
- Packet Filtering
- Internetwork Communication
- Path Selection
Routers are also used to select the path according the protocol used to configure the router. Various protocols available to configure the Router.
Routers are basically the switches only, and also we can say that Routers are layer 3 switches.
Advantages of Router
Router do not forward packets by default and can filter the various information which is configured accordingly.
Router is more advantageous for creating Internetwork. It allows more bandwidth to the users. Further we will see the protocols of Routers and how to configure it.
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