Which router will be used to forward traffic to destinations unknown in the area?
Refer to the exhibit.

Which router will be used to forward traffic to destinations unknown in the area?
A . R1
B . R4
C . R2
D . R5
E . R3
Answer: A
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A is True
The Attach bit. This bit indicates that the router is also a Level 2 router, and it can reach other areas. Level 1-only routers and Level 1-2 routers that have lost connection to other Level 2 routers will use the Attach bit to find the closest Level 2 router. They will point a default route to the closest Level 2 router.