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Which BGP attribute is also used for loop prevention?
A. weight
B. local preference
C. MED
D. AS path
Correct Answer: D
Explanation/Reference:
Explanation: Explanation/Reference:
As RFC 4271 says, “AS loop detection is done by scanning the full AS path (as specified in the AS_PATH attribute), and checking that the autonomous system number of the local system does not appear in the AS path”.