Valid Elements in BGP Path Selection Algorithm
Question
Which two elements are valid in the BGP path selection algorithm? (Choose two.)
Answers
Explanations
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A. B. C. D.BD
The Border Gateway Protocol (BGP) is the routing protocol used for exchanging routing information between different autonomous systems (ASes) on the Internet. BGP path selection algorithm is used to select the best path among the multiple paths available to reach a particular destination.
The BGP path selection algorithm considers multiple attributes in order to determine the best path. The two elements that are valid in the BGP path selection algorithm are:
Highest Local Preference Value: The local preference is an attribute used by BGP to indicate the preference for a particular route among multiple routes to the same destination. A higher local preference value indicates a higher preference for that route. The local preference value is set within the same AS and is used to influence the inbound traffic.
Lowest Multi-Exit Discriminator (MED): The MED is an optional attribute used by BGP to provide a hint to an external AS about the preferred path into the local AS. A lower MED value indicates a higher preference for that route. MED is used to influence the outbound traffic.
Therefore, the correct answers are D (highest local preference value) and B (lowest multi-exit discriminator).
