JNCIP ENT Class of Service Implementation

1. Which behavior aggregate (BA) code point is typically reserved for network control traffic?

CS0

CS6

CS7

EF

2. Which CoS component determines the maximum transmission rate for a forwarding class?

Classifier

Queue scheduler

Policer

Rewriter

3. True or False: A classifier can map multiple different packet characteristics to the same forwarding class.

True

False

4. Which scheduling discipline prevents starvation of lower-priority traffic?

Strict priority only

Weighted fair queueing

FIFO

Drop-tail

Submit

6. What is the maximum number of queues per interface on most Juniper ENT platforms?

2

4

8

16

7. True or False: Multiple rewrite rules can be applied to a single interface in sequence.

True

False

8. Which CLI command hierarchy is used to configure classifiers on a Juniper device?

Set class-of-service classifiers

Set firewall filter

Set forwarding-options

Set protocols bgp

9. What does the loss priority (LP) attribute control in Juniper CoS?

Packet forwarding speed

Drop probability during congestion

Queue depth limits

Interface bandwidth allocation

Submit

11. Which Juniper component maps incoming traffic to a forwarding class based on packet characteristics?

Classifier

Queue scheduler

Rewriter

Policer

12. True or False: CoS policies are applied only at egress interfaces on Juniper devices.

True

False

13. What is the purpose of a policer in CoS configuration?

Classify traffic by source IP

Enforce rate limits on traffic flows

Rewrite DSCP markings

Schedule queue transmission

14. Which scheduling algorithm guarantees minimum bandwidth to each queue?

Strict priority

Weighted fair queueing

FIFO

Random early detection

15. True or False: A single forwarding class can have multiple queue schedules assigned to it.

True

False

16. In CoS, which field in an IPv4 header carries the DSCP marking?

TTL

ToS

Protocol

Flags

17. What does the 'drop-tail' queue management algorithm do?

Drops packets randomly when congested

Discards packets when queue is full

Prioritizes low-latency traffic

Marks packets with ECN flags

18. Which DSCP value range is typically used for best-effort traffic?

0–15

16–31

32–47

48–63

19. How many forwarding classes does a Juniper device typically support by default?

2

4

8

16

20. What is the primary purpose of the rewrite rule in CoS configuration?

Mark outgoing packets with CoS values

Limit traffic rate

Classify incoming traffic

Drop low-priority packets

JNCIP ENT Class of Service Implementation Quiz

1. Which behavior aggregate (BA) code point is typically reserved for network control traffic?

2.

What first name or nickname would you like us to use?

2. Which CoS component determines the maximum transmission rate for a forwarding class?

3. True or False: A classifier can map multiple different packet characteristics to the same forwarding class.

4. Which scheduling discipline prevents starvation of lower-priority traffic?

5. The Expedited Forwarding (EF) DSCP value ensures ____ delivery for voice and video.

6. What is the maximum number of queues per interface on most Juniper ENT platforms?

7. True or False: Multiple rewrite rules can be applied to a single interface in sequence.

8. Which CLI command hierarchy is used to configure classifiers on a Juniper device?

9. What does the loss priority (LP) attribute control in Juniper CoS?

10. The 802.1p priority field contains ____ bits used for QoS marking.

11. Which Juniper component maps incoming traffic to a forwarding class based on packet characteristics?

12. True or False: CoS policies are applied only at egress interfaces on Juniper devices.

13. What is the purpose of a policer in CoS configuration?

14. Which scheduling algorithm guarantees minimum bandwidth to each queue?

15. True or False: A single forwarding class can have multiple queue schedules assigned to it.

16. In CoS, which field in an IPv4 header carries the DSCP marking?

17. What does the 'drop-tail' queue management algorithm do?

18. Which DSCP value range is typically used for best-effort traffic?

19. How many forwarding classes does a Juniper device typically support by default?

20. What is the primary purpose of the rewrite rule in CoS configuration?