Which BGP attribute is used as a loop-prevention mechanism in BGP?
- Multiple-exit discriminator (MED)
- Local Preference (LocPrf)
- Next Hop
- AS_Path
| Explanation & Hint:
The BGP attribute used as a loop-prevention mechanism in BGP is AS_Path. This attribute lists all the Autonomous Systems (AS) that an advertisement has passed through to reach a destination. By inspecting the AS_Path, BGP can detect and prevent routing loops by rejecting routes that include its own AS number in the path. |