200-301 Question #629: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. A network engineer must configure R1 so that it sends all packets destined to the 10.0.0.0/24 network to R3, and all packets destined to PC1 to R2. Which configuration must the engineer implement?

Options

• AR1(config)#ip route 10.0.0.0 255.255.255.0 172.16.0.2
• BR1(config)#ip route 10.0.0.0 255.255.0.0 172.16.0.2
• CR1(config)#ip route 10.0.0.0 255.255.255.0 192.168.0.2
• DR1(config)#ip route 10.0.0.0 255.255.0.0 192.168.0.2

Explanation

To route packets for the 10.0.0.0/24 network to R3, R1 must be configured with a static route specifying the destination network 10.0.0.0, a subnet mask of 255.255.255.0, and R3's directly connected IP address (192.168.0.2) as the next hop.

Common mistakes.

• A. This command specifies 172.16.0.2 as the next-hop, which is not the correct IP address of R3 connected to R1 for routing the 10.0.0.0/24 network.
• B. This command uses a subnet mask of 255.255.0.0, which corresponds to a /16 network, not the required /24 network, meaning it would route a larger range of IPs incorrectly.
• D. This command uses a subnet mask of 255.255.0.0 (a /16 network) and an incorrect next-hop of 192.168.0.2 (if the mask was intended to be /24), failing to meet the requirement for the 10.0.0.0/24 network.

Concept tested. Static IP routing configuration

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_static/configuration/xe-3s/irs-xe-3s-book/irs-static-route-config.html

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