Question 1.
Within a QoS policy-map configuration, one of the traffic classes is configured with the randomdetect dscp-based configuration command. What will that command accomplish?

A. provides congestion management by queueing the traffic using CBWFQ
B. provides congestion management by queueing the traffic using LLQ
C. decreases the probability of congestion by selectively dropping TCP packets before the queue 
    is full
D. provides congestion avoidance by selectively delaying the delivery of packets with lower  
    DSCP priority
E. decreases congestion by avoiding global UDP synchronization

Answer:  C

Explanation:

Question 2.
What are three benefits of IntServ and RSVP? (Choose three.)

A. RSVP helps network devices identify dynamic port numbers.
B. IntServ networks will reject or downgrade new RSVP sessions if all reservable bandwidth is  
   booked somewhere in a path.
C. RSVP signaling is a scalable way to ensure all devices maintain an accurate picture of the 
    network state.
D. They enable the network to guarantee necessary QoS to individual data flows.
E. The IntServ class-based approach is easy to design and implement.

Answer:  A, B, D

Explanation:

Question 3.
Which statement about the rates and statistics (such as match, transmit, drop, and police) shown in the show policy-map interface output is true?

A. The rates are computed as a moving average of instantaneous rates.
B. The rates are displayed in real time, which matches the actual traffic rate.
C. The matched statistics of the packet can be cleared only when the router reboots.
D. The matched statistics of the packet are displayed in real time.
E. The traffic policing statistics are displayed in real time.

Answer:  A

Explanation:

Question 4.
Which four factors can be used for packet classification in a QoS-aware network device? (Choose four.)

A. source address
B. destination address
C. DSCP
D. TTL
E. MQC
F. IP precedence

Answer:  A, B, C, F

Explanation:

Question 5.
What are the three primary types of faults associated with QoS fault management? (Choose three.)

A. classification faults
B. buffer faults
C. queue faults
D. marking faults
E. assurance faults
F. physical faults

Answer:  A, D, E

Explanation:

Question 6.
Which are the two locations where the SP network device always trusts the QoS markings from its upstream neighbor? (Choose two.)

A. at the ingress PE
B. at the egress PE
C. in the SP core
D. at the ingress CE
E. at the egress CE

Answer:  B, C 

Explanation:

Question 7.
Which of these correctly describes traffic classification using qos-group?

A. qos-group marking is automatically mapped to MPLS EXP marking.
B. qos-group is only applicable to an MPLS-enabled router.
C. qos-group marking value ranges from 0 to 7.
D. qos-group is local to the router.

Answer:  D

Explanation:

Question 8.
Which two IP SLA Probe types can be used to measure voice quality? (Choose two.)

A. HTTP
B. ICMP Path Jitter
C. UDP Echo
D. UDP Jitter
E. UDP Delay
F. UDP MOS

Answer:  B, D

Explanation:

Question 9.
Refer to the exhibit.
Traffic in CLASS-B is not getting a minimum bandwidth of 192 kb/s in this policy map. 

What can be done to correct this?

A. No changes are needed, the site is already correct.
B. The shape peak command should be used instead of the shape average command.
C. Set the shape rate to a CIR higher than 192 kb/s.
D. Decrease the maximum queue size.

Answer:  C

Explanation:

Question 10.
Which of these describes Short Pipe mode in QoS for MPLS VPN service providers?

A. Service provider can remark customer DSCP values.
B. Service provider does not remark customer DSCP values. (Service provider uses independent 
    MPLS EXP markings.) Final PE-to-CE policies are based on service provider markings.
C. The customer and service provider share the same DiffServ domain.
D. Service provider does not remark customer DSCP values. (Service provider uses independent 
    MPLS EXP markings.) Final PE-to-CE policies are based on customer markings.

Answer:  D

Explanation:

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