300-320 · Question #326
Which OSPF concept is used to relate areas to the backbone area through another area?
The correct answer is A. Virtual Links. OSPF requires all non-backbone areas to connect directly to Area 0 (the backbone). When a new area cannot physically connect to Area 0 - for example, after a network redesign or company merger - a Virtual Link is used. A Virtual Link creates a logical connection through a…
Question
Which OSPF concept is used to relate areas to the backbone area through another area?
Options
- AVirtual Links
- BBackup Links
- CInter-backbone Links
- DPoint-to-point Links
How the community answered
(32 responses)- A91% (29)
- B3% (1)
- C3% (1)
- D3% (1)
Explanation
OSPF requires all non-backbone areas to connect directly to Area 0 (the backbone). When a new area cannot physically connect to Area 0 - for example, after a network redesign or company merger - a Virtual Link is used. A Virtual Link creates a logical connection through a transit area (an area that has a physical connection to both the disconnected area and Area 0), effectively extending the backbone. This allows the non-contiguous area to participate in OSPF routing as if it were directly connected to Area 0. Virtual links are a workaround and not recommended as a permanent design solution.
Topics
Community Discussion
No community discussion yet for this question.