200-301 Question 292
Single answerA network administrator has configured a router with the following command: ip route 0.0.0.0 0.0.0.0 192.168.1.1. What is the purpose of this configuration?
- A
To route packets to a specific host in the 192.168.1.0/24 network
- B
To set the gateway of last resort for the router
- C
To establish a static route for all local subnets
- D
To enable dynamic routing using the 192.168.1.1 interface
Show answer and explanation
Correct answer: B
Explanation
The command ip route 0.0.0.0 0.0.0.0 192.168.1.1 is used to configure a default route, often referred to as the 'gateway of last resort'. This route is used by the router to forward packets for which no specific route exists in the routing table. In this case, 192.168.1.1 is the next-hop IP address where the router should send such packets.
- A. Incorrect.
This option is incorrect because the command
ip route 0.0.0.0 0.0.0.0 192.168.1.1specifies a default route, not a route to a specific host. - B. Correct.
This option is correct because the command
ip route 0.0.0.0 0.0.0.0 192.168.1.1defines a default route, which sets the gateway of last resort. The gateway of last resort is used when the router has no specific route for the destination in its routing table. - C. Incorrect.
This option is incorrect because the command does not establish routes for local subnets specifically, but rather sets a default route for all unknown destinations.
- D. Incorrect.
This option is incorrect because the command is used for static routing, not for enabling dynamic routing protocols.