What device is essential for connecting different computers in a network?

• A. Modem
• B. Router
• C. Switch
• D. Hub

Answer: (B)

The correct answer is that a router is essential for connecting different computers in a network because it serves as a central hub that directs data traffic between devices. Routers have the capability to connect multiple networks together, ensuring that data packets are sent to the appropriate destinations. They also manage traffic within a local area network and provide functions such as assigning IP addresses, providing firewall security, and allowing multiple devices to share a single internet connection. This makes routers crucial for both local area networks (LANs) and wide area networks (WANs), allowing seamless communication among various devices.

While modems, switches, and hubs play roles in networking, their functions differ. A modem connects a network to the internet and translates digital signals to analog for transmission and vice versa. A switch, on the other hand, connects multiple devices within a single local network and manages data packets between these devices but does not connect different networks. Hubs offer a simpler solution for connecting network devices, broadcasting data to all connected devices, but without the intelligent data routing capabilities of routers. Thus, for connecting different networks and effectively managing data transmission, a router is essential.