Question

Which description of a default gateway is true?

A. It is a security feature that denies certain traffic.
B. It is a device that receives IP packets that have no explicit next-hop in the routing table.
C. It is a feature that translates between public and private addresses.
D. It is a device that receives Layer 2 frames with an unknown destination address.

Answer 1

A default gateway is a device that forwards IP packets without an explicit next-hop in the routing table, acting as the local network's exit point for external destinations.

Step-by-step explanation:

The correct description of a default gateway is that it is a device that receives IP packets that have no explicit next-hop in the routing table. In other words, when a device on a network attempts to communicate with a device on another network, the default gateway serves as the exit point for the local network, forwarding the traffic to its destination beyond the local network. It is not a security feature that specifically denies traffic (like a firewall), nor does it handle the translation between public and private addresses (like network address translation, or NAT), nor does it handle Layer 2 frames with unknown destination addresses (which would typically be the function of a switch).