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Which reason is likely that R3 is missing the 2001:DB8:100:/64 route?
Refer to the exhibit.
All routers have FULL OSPF adjacencies
Which reason is likely that R3 is missing the 2001:DB8:100:/64 route?
A . R1 has prefix suppression configured
B . R1 has an incorrect area number configured
C . R1 has loop-free alternate routing configured
D . R1 has LSA throttling configured
Answer: A
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A is the correct answer however B is technically also correct , if R1 is in the wrong area we will see exactly the same output , this is because that route is learned from R2 .
in fact B is the correct answer , the exhibit don’t show any routers beyond R1 therefore we cannot assume its connected to another router which ruled out prefix-suppression so answer A is wrong.
Correct answer is A as the area 0 contains all 3 routers as shown in figure