Test yourself online, realize your shortcomings, improve your test ability. The Cisco Quality of Service (QoS) practice test at Prep4SureReview: 87 practice questions for the 642-642 exam.
Cisco 642-642 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Implementing Cisco Quality of Service (QoS) |
| Exam Number: | 642-642 |
| Exam Price: | USD 250 |
| Exam Format: | Multiple Answer, Simulation, Testlet, Multiple Choice |
| Certificate Validity Period: | Retired exam |
| Exam Duration: | 90 minutes |
| Passing Score: | Variable (Cisco does not publish a fixed passing score) |
| Related Certifications: | Cisco Certified Network Professional (CCNP) Cisco Certified Internetwork Professional (CCIP) |
| Real Exam Qty: | Approximately 55-65 questions |
| Available Languages: | English |
| Recommended Training: | Cisco QoS Training |
| Exam Registration: | Cisco Certification Exam Registration |
| Sample Questions: |  |
| Exam Way: | Pearson VUE testing centers and authorized Cisco exam delivery locations (legacy exam) |
| Pre Condition: | Recommended knowledge of Cisco routing and switching technologies. No formal prerequisite exam was required for 642-642. |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/qos.html |
Cisco 642-642 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: QoS Management and Implementation | - QoS policy configuration and verification - QoS monitoring and troubleshooting - QoS deployment considerations |
| Topic 2: Congestion Avoidance | - Weighted Random Early Detection - Random Early Detection |
| Topic 3: Introduction to Quality of Service | - QoS concepts and requirements - Traffic classification and marking concepts - QoS models and architectures |
| Topic 4: Classification and Marking | - Network-based application recognition and classification - Modular QoS CLI classification and marking - Layer 2 and Layer 3 marking |
| Topic 5: Link Efficiency Mechanisms | - Link fragmentation and interleaving - Compression technologies |
| Topic 6: Congestion Management | - Queuing mechanisms - Class-Based Weighted Fair Queuing - Low Latency Queuing |
| Topic 7: QoS for Voice and Video Applications | - Voice traffic requirements - End-to-end QoS deployment - IP telephony QoS design considerations |
642-642 Exam FAQ — Feel the Real Test
Through the vendor's official registration channels:
The Cisco Quality of Service (QoS) is delivered Pearson VUE testing centers and authorized Cisco exam delivery locations (legacy exam) — pick the arrangement that suits you when booking.
The Cisco Quality of Service (QoS) is Cisco's certification exam for Implementing Cisco Quality of Service (QoS), at the Professional level. Office workers without time for classes prepare best in spare time with focused material. Related credentials include Cisco Certified Network Professional (CCNP), Cisco Certified Internetwork Professional (CCIP).
Yes:
After any course, sharpen test ability with the 87 practice questions for the Cisco Quality of Service (QoS) — every answer expert-verified.
USD 250 per attempt, Variable (Cisco does not publish a fixed passing score) to pass. Retakes cost the full fee — realize your shortcomings early with the 87 practice questions for the 642-642 exam at Prep4SureReview.
Recommended knowledge of Cisco routing and switching technologies. No formal prerequisite exam was required for 642-642. Eligibility rules change over time, so verify the current requirements on the official page (official 642-642 exam page) before registering.
Upon successful payment, our system emails the Cisco Quality of Service (QoS) test braindump automatically within about a minute, with 24/7 customer assisting if nothing arrives within 2 hours. If you fail the corresponding 642-642 exam within 60 days of purchase, we full refund you: send a scanned enrollment slip plus the official Score Report PDF within 2 days of the exam, processed within 7 days. Excluded: exams within 3 days of purchase, candidate names that don't match the payer, and free or expired products. Or exchange for two equal-value products free.
90 minutes for Approximately 55-65 questions questions. The Prep4SureReview Soft Test Engine lets you set test time and check accuracy — like the actual test, on any electronic equipment.
The Cisco Quality of Service (QoS) blueprint spans 7 domains — including Link Efficiency Mechanisms, Classification and Marking, Congestion Avoidance. Daily checks keep our material aligned; the complete outline above lists every subtopic.
Yes — download the free demo of the Cisco Quality of Service (QoS) test braindump before you buy. Purchases include one-year free updating service — 365 days by email; renew afterward at 50% off.
Cisco Quality of Service (QoS) Sample Questions:
Refer to the exhibit. Why would applying the limit-interactive policy-map to the fa0/0 interface as shown below cause an error?
interface fa0/0 service-policy input limit-interactive
- A. TCP header compression can only be applied in the output direction.
- B. There is already an output service-policy defined on the fa0/0 interface.
- C. The interactive class-map has not been configured.
- D. Class-based policing can only be applied in the output direction.
- E. The interactive traffic class is missing the bandwidth {kbps} command.
Correct Answer: A 🗳️
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Where is the fragment size configured when using FRF.12 link fragmentation and interleaving?
- A. within the Frame Relay map-class
- B. within the logical multilink interface
- C. within the MQC class-map
- D. within the MQC policy-map
- E. within the physical serial interface
- F. within the MQC service-policy
Correct Answer: A 🗳️
Explanation: Only visible for Prep4SureReview members. You can sign-up / login (it's free).
What is the purpose of the qos pre-classify command?
- A. to enable the IOS to copy the ToS field from the outer tunnel IP header back into the original IP header
- B. to enable the IOS to copy the ToS field from the original IP header to the outer tunnel IP header
- C. to enable the IOS to classify the packet based on the outer tunnel IP header instead of the original IP header
- D. to enable class-based marking on IPSec crypto maps
- E. to enable the IOS to classify the packet based on the original IP header instead of the tunnel IP header
- F. to enable class-based marking on tunnel interface
Correct Answer: E 🗳️
Explanation: Only visible for Prep4SureReview members. You can sign-up / login (it's free).
Refer to the exhibit. A service provider is considering several alternative provisioning schemes for a new network. One proposed scheme involves aggregating 10-Mbps links from customers into a network with multiple 100-Mbps links to ensure that the network links have at least two times the capacity of the aggregate of the customer links.
What is the most appropriate description for the proposed scheme?
- A. CIR of 0
- B. overprovisioning
- C. oversubscription
- D. Bandwidth-on-Demand
- E. overaggregate
Correct Answer: B 🗳️
Explanation: Only visible for Prep4SureReview members. You can sign-up / login (it's free).
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