JN0-351 · Question #4
Which two BGP attributes must be supported by all BGP implementations and must be included in every update? (Choose two.)
The correct answer is A. AS path C. next hop. BGP attributes are properties that BGP uses for route advertisement, path selection, and loop prevention. There are four categories of BGP attributes: Well-known mandatory: Must be recognized by all BGP routers, present in all BGP updates, and passed on to other BGP routers…
Question
Which two BGP attributes must be supported by all BGP implementations and must be included in every update? (Choose two.)
Options
- AAS path
- BMED
- Cnext hop
- Dcommunity
How the community answered
(40 responses)- A85% (34)
- B5% (2)
- D10% (4)
Explanation
BGP attributes are properties that BGP uses for route advertisement, path selection, and loop prevention. There are four categories of BGP attributes: Well-known mandatory: Must be recognized by all BGP routers, present in all BGP updates, and passed on to other BGP routers. Well-known discretionary: Supported by all BGP implementations, and are optionally included in Optional transitive: May not be supported by all implementations of BGP. Optional non-transitive: May not be supported by all implementations of BGP. The well-known mandatory attributes must be supported by all BGP implementations and must be included in every update. These include the AS path and next hop attributes.
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