Q8. Which of the following are well-known mandatory attributes used in BGP? [Choose all that apply].
A. AS_PATH
B. NEXT_HOP
C. ORIGIN
D. COMMUNITIES
Correct Answer: A,B,C
Explanation:
Well-Known mandatory attributes must appear in all BGP update messages. The well-known mandatory messages are:
1. AS_PATH: BGP messages carry the sequence of AS numbers indicating the complete path a message has traversed.
2. NEXT_HOP: This attribute indicates the IP address of the next-hop destination router.
3. ORIGIN: This attribute tells the receiving BGP router, the BGP type of the original source of the NLRI information.
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