Q: 6
Which BGP attribute Is used to detect touting loops?
Options
Discussion
Option A is right here. BGP uses AS path to spot loops by checking if its own AS shows up in the list when receiving a route, pretty standard for loop avoidance in inter-AS environments. If anyone's seen it handled differently, let me know.
Option A is correct. AS path is the main BGP attribute used to check for routing loops, as routers look for their own ASN in the path. Official guides and some practice tests cover this a lot. Pretty sure, but anyone seen different behavior on lab gear?
Pretty sure it's A, since AS path lists all the autonomous systems a route has traversed and BGP routers use it to spot their own AS number showing up (that's a loop). Official cert guides and practice exams both make a big deal about this. If anyone used another attribute for loop detection in Juniper configs, let me know!
A for sure. BGP uses the AS path to spot and prevent routing loops, since a router just checks if its own AS number appears in the path already. Next hop (D) is more about reachability, not loops. Pretty confident on this one, but let me know if anyone's seen it otherwise.
A imo. Saw a similar question in an exam report, AS path is the classic loop prevention method in BGP.
Maybe D for next hop, since the next hop attribute changes as the route moves along and helps routers decide path selection. Not totally sure though, but I remember seeing something like this in a practice test. Anyone else thinking the same?
Its A for sure. AS path is what BGP checks to spot its own AS and avoid a routing loop, classic exam topic. Seen this covered clearly in the official guide and Juniper practice tests too. If they're not talking about confederations, I'm confident it's A.
A, AS path
Loop detection in BGP depends on the AS path, so A. But if confederations are used, it can get tricky.
C/D? Seen similar question in practice, think either could be used depending on BGP scenario.
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