LFCS Question #68: Real Exam Question with Answer & Explanation

Question

What is true regarding a default route?

Options

• AThe default route is always used first. When the default route is not available more specific routes
• BWhen a default route is set, all other routes are disabled until the default route is deleted.
• CThe default route is only used if there is not a more specific route to a destination host or network.
• DWithout a default route, no network communication even in directly attached networks is possible.

Explanation

A default route serves as a gateway for all traffic to destinations for which no more specific route is defined in the routing table.

Common mistakes.

• A. The default route is used last among available routes, only after more specific routes have been considered and found not to match.
• B. A default route does not disable other routes; rather, more specific routes take precedence over the default route.
• D. Without a default route, communication to networks not directly attached or for which no specific route exists is impossible, but communication within directly attached networks can still occur.

Concept tested. Default route function

Reference. https://learn.microsoft.com/en-us/windows-server/networking/technologies/ip-basics/understand-tcp-ip-addressing-and-routing

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