Which of the following descriptions about routing are wrong? (Multiple choice)

Question

Options

• AA route can present the complete path information to the destination of the route
• BThe function of routing is to guide Layer 2 forwarding
• CThe next hop address of the route must be the interface address of the next layer 3 device in the
• DRouting must be manually configured

• A
  82% (49)
• C
  18% (11)

Explanation

Options A, B, and D are all incorrect statements about routing. A route entry only stores the next-hop address, not the complete end-to-end path - each router independently determines its own next hop, making routing a hop-by-hop process, not a full-path-aware one. B is wrong because routing operates at Layer 3 (the Network Layer) to guide IP forwarding; Layer 2 forwarding is the job of switching, which uses MAC addresses. D is wrong because routing does not require manual configuration - directly connected routes are added automatically, and dynamic routing protocols (OSPF, BGP, RIP, etc.) build and maintain the routing table without manual intervention.

Option C is the correct statement: the next-hop address in a route is indeed the interface IP of the next Layer 3 device along the path, which is standard routing behavior.

Memory tip: Watch for absolutes like "must" and mismatched layers. If a choice says routing must be manual, knows the full path, or works at Layer 2 - it's wrong, because routing is hop-by-hop, Layer 3, and supports dynamic protocols.

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