Which three restrictions apply to OSPF stub areas? (Choose three.) Select 3 response(s).
A.
No virtual links are allowed.
B.
The area cannot be a backbone area.
C.
Redistribution is not allowed unless the packet is changed to a type 7 packet.
D.
The area has no more than 10 routers.
E.
No autonomous system border routers are allowed.
F.
Interarea routes are suppressed.
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Answer: A B E
I think it’s ABF
A B E is correct
ABE:correct
Other stub area restrictions are that a stub area cannot be used as a transit area for virtual links. Also, an ASBR cannot be internal to a stub area. These restrictions are made because a stub area is mainly configured not to carry external routes and any of the above situations cause external links to be injected in that area. The backbone, of course, cannot be configured as stub.
http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094e9e.shtml#t31