4. Why is it necessary for Host A (IP address 10.23.2.4) to communicate through the router at 10.23.2.1 to reach hosts on the rest of the internet, as mentioned in the text?
Because it can reach the hosts on the network provided, but to communicate with hosts on the internet, it must connect with the router as router is the device that connects all the hosts on the network to the internet.
Host A (IP address 10.23.2.4) relies on the router at 10.23.2.1 to connect with destinations beyond its local network, enabling communication with hosts on the broader internet. The router serves as the gateway, facilitating the exchange of information between Host A and external internet destinations.