What is a router and how does it work?

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Router connects two or more networks or subnetworks together. Routers are used to transfer data packets between networks. The router works on Layer 3 of the OSI model, ie the Network layer. It transmits (passes) data from one network to another.
Router is a networking device that connects your mobile, laptop, computer, etc. to the Internet. Big companies or big organizations use Router to connect to the Internet or to connect with each other.Router is a main tool in networking, it has many features which are as follows.

A router is also called a network layer device because it operates at layer 3 of the OSI model.
It is used in both local area network (LAN) and wide area network (WAN).
It transfers the data in the form of IP packets. It locates the IP address of the destination device to transmit the data.
It connects different networks and sends data packets between the two networks.
The router has a table called routing table which contains the IP addresses of all the devices connected to the network and the route to connect to them. Routers refresh it from time to time.
Routers protect against broadcast strom.

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