Multiple choice technology

Why would you make a non-backbone area a stub or not-so-stubby area?

  1. to aggregate routes learned from the ABR

  2. to lower the cost of routes advertised by the ABR

  3. to connect a non-contiguous area to the backbone

  4. to decrease the size of the link-state database in that area
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Configuring a non-backbone area as a stub or NSSA (Not-So-Stubby-Area) significantly reduces the link-state database size in that area by preventing Type-5 LSAs (stub) or limiting external route advertisements (NSSA). Stub areas don't receive external LSAs from non-backbone areas. NSSA areas allow limited external routes but still reduce the database size compared to a regular area. Options A, B, and C describe incorrect purposes for stub/NSSA configuration.

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