Refer to the exhibit. In addition to static routes directing traffic to networks 10.10.0.0/16 and 10.20.0.0/16, Router HQ is also configured with the following command: ip route 0.0.0.0 0.0.0.0 serial 0/1/1 What is the purpose of this command?
- Packets from the 10.10.0.0/16 network will be forwarded to network 10.20.0.0/16, and packets from the 10.20.0.0/16 network will be forwarded to network 10.10.0.0/16.
- Packets that are received from the Internet will be forwarded to one of the LANs connected to R1 or R2.
- Packets with a destination network that is not 10.10.0.0/16 or is not 10.20.0.0/16 or is not a directly connected network will be forwarded to the Internet.
- Packets that are destined for networks that are not in the routing table of HQ will be dropped.
Answers Explanation & Hints:
The purpose of the command “ip route 0.0.0.0 0.0.0.0 serial 0/1/1” on Router HQ is to forward packets with a destination network that is not in the routing table of HQ to the Internet.
This is a default route, also known as a gateway of last resort. It is used when a router does not have a specific route for a destination network in its routing table. The IP address 0.0.0.0 with the subnet mask 0.0.0.0 represents all possible destinations, and the serial interface 0/1/1 is the next hop towards the Internet.
Therefore, any packets that are not destined for networks 10.10.0.0/16 or 10.20.0.0/16 or any directly connected network will be forwarded to the Internet via the serial interface 0/1/1.