Exam 400-007 topic 1 question 83 discussion

BC is the ans as per cisco

The correct answers are B. intolerance to jitter and A. small transactions (HTTP-like behavior). B. intolerance to jitter: Applications that require low latency or real-time processing, such as VoIP or video streaming, are intolerant to jitter (variations in delay). These applications require priority treatment in the queue to ensure smooth delivery of their traffic without delay fluctuations. A. small transactions (HTTP-like behavior): Small, latency-sensitive transactions, such as those typically seen with HTTP or DNS requests, require priority treatment to minimize delays and ensure quick response times.

A & C: Priority queue is for jitter intolerant application like Voip. Voip can tolerate packet small amount of packet loss as it doesn't need to re-transmit (UDP). Better to lose packet than for it to be delayed.

I vote for AB. Like VoIP does not tolerance topacket loss but it always need to be put in the priority queue.

I feel the HTTP comment is mis-leading but priority gets serviced before other queues so you don't want large packets placed in that queue and Voice bearer traffic is UDP which is normally placed in that queue so 'E' is out. https://www.cisco.com/c/en/us/td/docs/ios/qos/configuration/guide/12_2sr/qos_12_2sr_book/congstion_mgmt_oview.html

if you put traffic in the priority queue it means it may be dropped cuase pqueue should have limit