Which three statements are true about strict-high priority queues? (Choose three.)
A.
In systems that support strict-high and high priority queues, traffic in the strict-high queue is completely emptied, and then high priority queue traffic is processed.
B.
In systems that support strict-high and high priority queues, traffic in these two priorities is processed in a round-robin fashion.
C.
When a strict-high queue goes into negative credits, it will maintain a strict DSCP marking.
D.
When a strict-high queue can never go into negative credits and will always transmit the traffic in the queue.
E.
In systems that support multiple strict-high priority queues, traffic in the strict-high queue is processed in a round-robin fashion.
A is not correct, B is correct:
As long as the queue with strict-high priority has traffic to send, it receives precedence over all other queues, except queues with high priority. Queues with strict-high and high priority take turns transmitting packets until the strict-high queue is empty, the high priority queues are empty, or the high priority queues run out of bandwidth credit. Only when these conditions are met can lower priority queues send traffic.
The software locates all high-priority queues that are currently in profile. These queues are serviced first in a weighted round-robin fashion.
Ok, as they didn't mention SRXs explicitly, maybe it is B.
But SRXs use MDRR which I think allocates all traffic to the strict-high until it's empty, so it can easily starve all the other queues.
B
ref. https://www.juniper.net/documentation/en_US/junos/topics/concept/schedulers-priority-overview-cos-config-guide.html
upvoted 2 times
...
This section is not available anymore. Please use the main Exam Page.JN0-647 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
CiscoTest
Highly Voted 5 years, 4 months agoPlinkity_Plonk
Most Recent 4 years, 2 months agoboyseven777
4 years, 9 months ago