Which of the following descriptions about the host gateway is correct? (Multiple choice)

Question

Options

• AAfter configuring the gateway for the injection machine, the message sent by the host will be
• BAfter configuring the gateway for the injection machine, the host will generate a default route
• CAfter configuring the gateway for the injection machine, the host will generate a route whose
• DAfter configuring five gateways for the injection machine, the next hop of the route generated by

• A
  9% (5)
• B
  75% (40)
• C
  15% (8)

Explanation

Options B and D are correct because configuring a gateway on a host causes the OS to automatically install a default route (destination 0.0.0.0/0) pointing to that gateway as the next hop - this is B. For D, when multiple gateways are configured, the system generates routes with a specific next-hop behavior determined by the last or highest-priority gateway, meaning the route's next hop reflects that particular gateway address rather than all of them simultaneously.

Why A is wrong: Configuring a gateway does not change how the host formats or encapsulates outgoing messages at the application/transport layer - it only affects routing decisions, not the messages themselves.

Why C is wrong: The route generated is a default route (0.0.0.0/0 with mask 0.0.0.0), not a host-specific or subnet-specific route. Option C likely describes an incorrect destination or mask for the generated route.

Memory tip: Think of a gateway as a "signpost" - installing it on a host just adds one sign: "For everything unknown, go here" (default route). No matter how many signs you install, each sign points to one specific next-hop address (D). The signs don't rewrite your letters (A is wrong) and they don't point to your own street (C is wrong - it's 0.0.0.0/0, not a specific subnet).

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