Which interface will forward traffic to the destination network?

The router uses its routing table to determine the best path for traffic. When a packet arrives, the router looks for the most specific match for the destination IP address in its routing table. The entry with the longest prefix match is preferred. If multiple paths exist, the one with the lowest administrative distance (AD) and then lowest metric is chosen. The interface associated with that chosen route is the exit interface for the traffic. Without the routing table or destination IP, we cannot definitively determine the correct interface. However, assuming G0/20 is the correct answer, it implies that the routing table entry pointing to the destination network uses G0/20 as its exit interface. The other interfaces (G0/9, G0/16, G0/11) would be incorrect because they are not the designated exit interface for the destination network according to the router's routing table.