单选题Which BGP attribute is used by BGP to prevent routing loops?（）AAS - pathBnext - hopCMEDDweightElocal preferenceForigin
单选题
Which BGP attribute is used by BGP to prevent routing loops?（）
A
AS - path
B
next - hop
C
MED
D
weight
E
local preference
F
origin
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解析：
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