LFCS · Question #68
What is true regarding a default route?
The correct answer is C. The default route is only used if there is not a more specific route to a destination host or network. A default route serves as a gateway for all traffic to destinations for which no more specific route is defined in the routing table.
Question
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.
How the community answered
(42 responses)- A2% (1)
- B2% (1)
- C95% (40)
Why each option
A default route serves as a gateway for all traffic to destinations for which no more specific route is defined in the routing table.
The default route is used *last* among available routes, only after more specific routes have been considered and found not to match.
A default route does not disable other routes; rather, more specific routes take precedence over the default route.
The routing table prioritizes the most specific route available for a destination. The default route, often represented as `0.0.0.0/0` or `::/0`, acts as a "catch-all" and is only used if no other, more specific route matches the destination IP address of the outgoing packet.
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
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/ip-basics/understand-tcp-ip-addressing-and-routing
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