Adobe Certification

Cisco 642-642 exam
Title : Quality of Service (QOS)

The Cisco 642-642 Implementing Cisco Quality of Service exam from Cisco certification is one of the exams needed for the Cisco Certified Security Professional certification (CCSP) certification.  This Cisco 642-642 Implementing Cisco Quality of Service exam is one of the qualifying exams for the Cisco Certified Internetwork Professional, Cisco Certified Voice Professional, Cisco IP Telephony Design Specialist, Cisco IP Telephony Express Specialist, Cisco IP Telephony Operations Specialist and Cisco IP Telephony Support Specialist certifications.  This exam measures the measures a candidates understanding and knowledge to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in a Service Provider environment.

Testinside has assembled to take you through 182 Q&As to your 642-642 exam preparation. In the 642-642 exam resources, you will cover every field and category in CCIP helping to ready you for your successful Cisco Certification. You can download free 642-642 demo here:
1. Refer to the following parameters, which of the following are not traffic characteristics that can be
affected by QoS tools?
A. Delay
B. MTU
C. Reliability
D. Bandwidth
Answer: C

2. After learning QoS, for the following options, Which of the following characterize problems that could
occur with voice traffic when QoS is not applied in a network?(choose two)
A. Voice sounds choppy.
B. Calls are disconnected.
C. VoIP broadcasts increase as Queuing delay increases, causing delay and caller interaction problems.
D. Voice call requires more bandwidth as lost packets are retransmitted.
Answer: AB

3. For the following options, which of the following components of delay varies based on the varying sizes
of packets sent through the network?
A. Codec delay
B. Serialization delay
C. Queuing delay
D. Propagation delay
Answer: B

4. For the following statements about packet loss, which of the following is the most likely reason for
packet loss in a typical network?
A. Jitter thresholds being exceeded
B. TCP flush messages as a result of Round-Trip Times varying wildly
C. Tail drops when queues fill
D. Bit errors during transmission
Answer: C

5. By learning voice ,Ignoring Layer 2 overhead, how much bandwidth is required for a VoIP call using a
G.729 coded? (Link: Voice Bandwidth Considerations)
A. 16 kbps
B. 32 kbps
C. 24 kbps
D. 8 kbps
Answer: C

6. Based on the judgement of voice traffic, which two components are of delay for a VoIP call, but not for a
data application?(choose two)
A. Packetization delay
B. Serialization delay
C. Queuing delay
D. Filling the De-jitter buffer
Answer: AD

Good luck!