Which of the following is an OSPF configuration parameter that is used on an ABR, but not
on an internal router?
A.
A virtual link to area 0.
B.
OSPF summarization command.
C.
default-cost extension to the area command.
D.
no-summary extension to the area stub command.
E.
None of the other alternatives apply
A. is ALSO accurate:
v-link goes from the ABR at the edge of the disconnected Area
to the ABR at Area 0…..spanning the area in between.
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V-Links are on ABR only as well…think about it.
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A and B are also true 🙂
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summarization command does not exist is area x range
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Best Regards!
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