Question

why a roter can be used to​

Answer 1

The main purpose of a router is to connect multiple networks and forward packets destined either for its own networks or other networks. A router is considered a layer-3 device because its primary forwarding decision is based on the information in the layer-3 IP packet, specifically the destination IP address.

Answer 2

Explanation:

A router has the following functions: Routers let multiple computers share a common Internet connection from your ISP (Internet Service Provider). ... A computer connected directly to the ISP cable connection is subject to attack. The presence of a router improves security.

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