200-301 Question 281
Single answerA network engineer is configuring a static route on a router to reach the 192.168.20.0/24 network. The router has two outbound interfaces, GigabitEthernet0/0 and GigabitEthernet0/1. The next-hop IP address for the 192.168.20.0/24 network is 10.1.1.2, reachable via GigabitEthernet0/0. Which of the following is the correct static route configuration?
- A
ip route 192.168.20.0 255.255.255.0 10.1.1.2
- B
ip route 192.168.20.0 255.255.255.0 GigabitEthernet0/1
- C
ip route 192.168.20.0 255.255.255.0 10.1.1.2 GigabitEthernet0/0
- D
ip route 192.168.20.0 255.255.255.0 GigabitEthernet0/0
Show answer and explanation
Correct answer: A
Explanation
The most specific method of configuring a static route is to define the destination network, subnet mask, and the next-hop IP address. In this case, 'ip route 192.168.20.0 255.255.255.0 10.1.1.2' is the correct command. The router uses the next-hop IP address to determine the correct outbound interface dynamically, ensuring proper routing.
- A. Correct.
This is the correct configuration. Specifying the next-hop IP address (10.1.1.2) is sufficient, as the router will determine the correct outbound interface (GigabitEthernet0/0) via ARP resolution.
- B. Incorrect.
This configuration specifies only the outbound interface (GigabitEthernet0/1), but it is incorrect because the next-hop IP address (10.1.1.2) is not explicitly defined, and this interface is not the correct path to reach the destination network.
- C. Incorrect.
This configuration is invalid because it combines both the next-hop IP address and the outbound interface together. This is not the correct syntax for defining a static route in Cisco IOS.
- D. Incorrect.
This configuration specifies only the outbound interface (GigabitEthernet0/0), but it lacks the next-hop IP address (10.1.1.2). While this syntax is valid in some scenarios, it is not the most specific configuration and could lead to issues with recursive lookups.