An administrator needs to ensure that the router forwards all traffic destined only for the 192.168.20.0/24 network to the next-hop IP address 10.0.0.2. Which command should be used to achieve this?
ip route 192.168.20.0 255.255.255.0 Serial0/0
ip route 192.168.20.0 255.255.255.0 10.0.0.2
ip route 192.168.20.0 255.255.255.255 10.0.0.2
ip route 0.0.0.0 0.0.0.0 10.0.0.2
The correct command is 'ip route 192.168.20.0 255.255.255.0 10.0.0.2' because it creates a static route to the 192.168.20.0/24 network with the specified next-hop IP. The subnet mask 255.255.255.0 correctly represents the /24 network. Using '0.0.0.0 0.0.0.0' defines a default route, which directs all unspecified traffic and not just the 192.168.20.0/24 network. Specifying the subnet mask as 255.255.255.255 would create a host route for a single IP address, not the entire network. Using an interface like 'Serial0/0' instead of the next-hop IP may not be appropriate in networks with multiple possible paths or where the interface is connected to multiple networks.
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