Which statement describes a router?

Which statement describes a router?

• A. Routers interconnect logical networks by forwarding information to other networks based upon IP addresses
• B. A device that translates domain names to IP addresses
• C. A device that blocks all traffic
• D. A wireless access point

Answer: (A)

Routers connect different networks and forward packets toward their destinations using IP addresses. They operate at the network layer, look at the destination IP in each packet, and consult routing tables (often updated by routing protocols) to decide the best next hop. This is what allows a device on one subnet to reach a device on another subnet, such as from a home network out to the internet. The other functions described are different roles: translating domain names to IP addresses is handled by DNS, not routing. Blocking all traffic is more the job of a firewall or security device, not a standard router's primary role. A wireless access point provides wireless connectivity but does not route between networks by itself.

Routers connect different networks and forward packets toward their destinations using IP addresses. They operate at the network layer, look at the destination IP in each packet, and consult routing tables (often updated by routing protocols) to decide the best next hop. This is what allows a device on one subnet to reach a device on another subnet, such as from a home network out to the internet.

The other functions described are different roles: translating domain names to IP addresses is handled by DNS, not routing. Blocking all traffic is more the job of a firewall or security device, not a standard router's primary role. A wireless access point provides wireless connectivity but does not route between networks by itself.