Which statement describes the function of a router?

Which statement describes the function of a router?

• A. It connects devices within a LAN and forwards frames based on MAC addresses.
• B. It translates domain names to IP addresses.
• C. It provides wireless access to a network.
• D. It connects multiple networks and routes packets between them.

Answer: (D)

Routers connect multiple networks and route packets between them. They operate at the network layer and use IP addresses to determine where a packet should go, consulting routing tables and protocols to choose the best path across networks. This is why the description that a router connects different networks and forwards packets between them is the one that fits best. In contrast, a device that forwards frames within a single local network based on MAC addresses is a switch, domain-name translation to IP addresses is the job of DNS, and providing wireless access to a network describes an access point.

Routers connect multiple networks and route packets between them. They operate at the network layer and use IP addresses to determine where a packet should go, consulting routing tables and protocols to choose the best path across networks. This is why the description that a router connects different networks and forwards packets between them is the one that fits best. In contrast, a device that forwards frames within a single local network based on MAC addresses is a switch, domain-name translation to IP addresses is the job of DNS, and providing wireless access to a network describes an access point.