CV0-004 Question #256: Real Exam Question with Answer & Explanation

Question

An administrator configures three subnets to the corporate network. All servers should communicate with the main corporate network and access the internet. The administrator creates the following configurations: After configuring the networks, the administrator recognizes an issue with the configuration. Which of the following can the administrator change in one step to accomplish the goal?

Options

• ARemove source 192.168.12.0/24 and destination 192.168.1.0/24 from the routing table.
• BReplace destination 192.168.1.0/24 with destination 192.168.0.0/24.
• CAdd source 192.168.12.0/24 and destination 192.168.0.0/24 to the routing table.
• DReconfigure Network 4 to 192.168.13.0/24.

Explanation

To allow three subnets to communicate with the main corporate network and access the internet, the routing table needs a more generalized route to the corporate network by using a broader CIDR block.

Common mistakes.

• A. Removing specific routes would hinder communication, not enable it, and the goal is to enable communication for all servers.
• C. Adding a source and destination route for 192.168.0.0/24 might be partially correct, but replacing an existing, overly specific route is a more precise 'one step' fix for a misconfiguration, assuming a specific route already exists.
• D. Reconfiguring Network 4 to a different IP range does not address routing table issues for existing subnets to communicate with the main corporate network or the internet; it changes a network's identity, which is not the core problem.

Concept tested. IP routing table configuration (CIDR)

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

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