H12-821_V1.0 · Question #733
In BGP route selection rules, when other conditions are the same, the route with the larger MED value will be given priority as the best route.
The correct answer is B. FALSE. B is correct because in BGP route selection, a lower MED value is preferred, not a higher one. MED (Multi-Exit Discriminator) is an optional, non-transitive attribute that hints to external neighbors which path to use when entering an AS - the lower the MED, the more preferred…
Question
Options
- ATRUE
- BFALSE
How the community answered
(24 responses)- A29% (7)
- B71% (17)
Explanation
B is correct because in BGP route selection, a lower MED value is preferred, not a higher one. MED (Multi-Exit Discriminator) is an optional, non-transitive attribute that hints to external neighbors which path to use when entering an AS - the lower the MED, the more preferred the route.
Why A is wrong: The statement inverts the rule. A router receiving multiple routes with the same attributes up to that point will select the route with the smallest MED, making "larger MED = better" a direct contradiction of the standard.
Memory tip: Think of MED like a cost or penalty - lower cost wins, just like in OSPF/IS-IS metric or EIGRP cost. If you can remember "lower is better" for IGP metrics, apply the same logic to BGP MED.
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