Question

when a host on network a sends a message to a host on network B, which address does the router look at​

Answer 1

Answer:

A host on network A when sends the packet to the host on network B, it checks the IP address of the receiving host and routes the packet to the suitable hop. Physical address i.e. the MAC address is used to recognize a unique host over a network on in a LAN.

Answer 2

When a host on a network sends a message to a host on network B, which address does the router look at​ its IP address.

• The IP address is used in routing.
• When a host sends a packet to a host of another network, first it checks the IP address of the host of another network and if the IP address is correct then only it routes the packets to the next network also known as hop.