Free JNCIA CoS Features Questions and Answers — Questions and Answers
Question 1: What is the primary purpose of Class of Service (CoS) in Junos OS?
- To enhance network security
- To prioritize traffic based on application or user needs (Correct answer)
- To reduce network latency
- To simplify routing configuration
Correct answer: To prioritize traffic based on application or user needs
CoS ensures that critical traffic, such as voice or video, gets higher priority compared to less critical traffic like file downloads.
Question 2: Which component in CoS is responsible for marking packets for priority handling?
- Scheduler
- Policers
- Classifier (Correct answer)
- Forwarder
Correct answer: Classifier
Classifiers identify packets and assign them to specific forwarding classes based on criteria like IP precedence or DSCP values.
Question 3: What is the role of a scheduler in Junos OS CoS?
- Drops packets when queues are full
- Assigns packets to forwarding classes
- Manages bandwidth allocation and queue prioritization (Correct answer)
- Reorders packets to maintain sequence
Correct answer: Manages bandwidth allocation and queue prioritization
Schedulers determine how bandwidth is shared and prioritize traffic within queues.
Question 4: Which Junos CoS feature enforces traffic rates by dropping packets when limits are exceeded?
- Shaping
- Policing (Correct answer)
- Scheduling
- Forwarding
Correct answer: Policing
Policing enforces traffic rate limits by dropping or remarking packets that exceed the specified rate.
Question 5: What command is used to configure CoS classifiers in Junos OS?
- set classifier
- set class-of-service classifier (Correct answer)
- set cos priority
- set traffic classifier
Correct answer: set class-of-service classifier
The set class-of-service classifier command configures packet classification in Junos OS.
Free JNCIA CoS Features Questions and Answers
What is the primary purpose of Class of Service (CoS) in Junos OS?