Cisco 642-642 dumps - in .pdf

642-642 pdf
  • Exam Code: 642-642
  • Exam Name: Quality of Service (QoS)
  • Updated: Sep 18, 2026
  • Q & A: 87 Questions and Answers
  • PDF Price: $59.99

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  • Exam Code: 642-642
  • Exam Name: Quality of Service (QoS)
  • Updated: Sep 18, 2026
  • Q & A: 87 Questions and Answers
  • PDF Version + PC Test Engine + Online Test Engine
  • Value Pack Total: $119.98  $79.99
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Cisco 642-642 dumps - Testing Engine

642-642 Testing Engine
  • Exam Code: 642-642
  • Exam Name: Quality of Service (QoS)
  • Updated: Sep 18, 2026
  • Q & A: 87 Questions and Answers
  • Software Price: $59.99
  • Testing Engine

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Cisco 642-642 Exam Syllabus Topics:

SectionWeightObjectives
Classification and Marking20%- Marking mechanisms and trust boundaries
- NBAR, ACL-based classification
- Layer 2 and Layer 3 classification
IP QoS Fundamentals and Models20%- Need for QoS in converged networks
- QoS models: Best-Effort, IntServ, DiffServ
- DSCP, IP Precedence, CoS, MPLS EXP marking
Congestion Management20%- Priority queuing and bandwidth allocation
- Queuing algorithms: WFQ, CBWFQ, LLQ
Congestion Avoidance & Link Efficiency10%- Fragmentation, Compression, LFI
- WRED, RED
Traffic Policing and Shaping15%- Shaping: GTS, FRTS, CB-Shaping
- Policers: single-rate, two-rate
Modular QoS CLI (MQC) and AutoQoS15%- AutoQoS for Enterprise and VoIP
- Class-maps, Policy-maps, Service-policy

Cisco Quality of Service (QoS) Sample Questions:

Question #1

HOTSPOT

Reveal Solution  Discussion  0

Correct Answer:


Explanation:

Question #2

DRAG DROP

Reveal Solution  Discussion  0

Correct Answer:

Question #3

When configuring WFQ, what is the default number of dynamic queues based on?

  • A. inter-packet arrival rate
  • B. interface bandwidth
  • C. congestive discard threshold (CDT)
  • D. drop probability denominator
  • E. hash of the packet headers
  • F. hold-queue limit
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Explanation: Only visible for ITExamDownload members. You can sign-up / login (it's free).

Question #4

What are three methods of reducing delay for critical applications in a converged network? (Choose three.)

  • A. Reduce inter-packet gaps.
  • B. Increase all queue depths.
  • C. Increase link capacities.
  • D. Increase LFI fragment size.
  • E. Apply header compression.
  • F. Apply payload compression.
Reveal Solution  Discussion  0

Correct Answer: C,E,F  🗳️

Question #5

HOTSPOT

Reveal Solution  Discussion  0

Correct Answer:


Explanation:

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