Cisco 642-642 test study
The mere name of Cisco 642-642 can attract all organizations like a swarm of nectar-hungry bees. Having it under one’s belt opens new realms of opportunities hitherto unknown and unconquered. TK’s Quality of Service (QoS) is the dream certificate of many professionals. You can have this too. Give your career the bounce it needs by choosing 642-642 of Cisco. Association with Cisco will ensure your success and growth no matter where you might pursue your career. Let TestKing-Exams.com take every worry off your mind and make this dream of an association a reality!28. You are the network administrator at PassGuide . The newly appointed PassGuide trainee wants to know in which configuration mode the following MQC command can be used. What will your reply be?
match ip dscp af41?
A. interface configuration mode
B. service policy configuration mode
C. class map configuration mode
D. policy map configuration mode
E. none of the above
Answer: C
29. What is a key benefit of using the Cisco Modular QoS Command Line Interface (MQC)?
A. Provides performance metrics for QoS configurations.
B. Eliminates the need for map classes to perform traffic classification.
C. Allows users to specify traffic classes independently from QoS polices.
D. Allows QoS policy information to be automatically distributed throughout the network.
E. Provides an integrated testing mechanism for traffic classification and QoS policy configurations.
Answer: C
30. What is the effect of enabling Weighted Fair Queuing (WFQ) on low-speed router interface?
A. Delay is guaranteed for high-priority traffic types.
B. Bandwidth is guaranteed for different traffic queues.
C. Fixed-size queues are pre-allocated for different traffic flows.
D. Low-bandwidth traffic receives priority over high-bandwidth traffic.
Answer: D
31. What is the function of Modular QoS Command Line Interface (MQC) classification?
A. to identify traffic independently of QoS polices
B. to mark traffic based on the Class Latency index (CLI)
C. to route traffic based on the multiple QoS policies
D. to group QoS configuration commands into modules to ease configuration
E. To aggregate traffic onto one QoS classification for operational efficiency (CPU and Memory)
Answer: A
32. On a Cisco switch, CDP v2 must be enabled for which AutoQoS configuration to function properly?
A. WTT queuing
B. trust boundary
C. fr-atm
D. ciscosoflphone
Answer: B
33. What three actions can reduce packet sizes on WAN links supporting converged VoIP and data? (Choose three)
A. Configure LFI to an average packet size for all traffic on the WAN link
B. Configure compressed RTP headers
C. Configure software payload compression
D. Configure hardware payload compression
E. Configure LFI to the same size as the voice packets.
Answer: BCE
34. What will happen when class-based header compression is configured without specifying RTP or TCP?
A. Only TCP headers will be compressed
B. Only RTP headers will be compressed
C. The unrecognized command warning is returned.
D. RTP and TCP headers will be compressed
Answer: D
35. What are the benefits, as listed in the DQOS course, for Enterprise Networks when QoS is implemented? (Choose all that apply.)
A. It sets traffic priorities across the network.
B. It allows better LAN performance through Per QOS Spanning Tree (PQST).
C. It minimizes loss during bursty congestion.
D. It allows for the disconnection of calls.
E. It reduces the amount of data sent through the network using Content Distribution Networking (CDN).
Answer: AC
Using PassGuide online virtual CCVP practice engine, easy to know well CCVP Training knowledge and pass the Cisco CCVP certification exams.36. In which way does the Integrated Services model differ from the Differentiated Services model?
A. Integrated Services is more scalable than Differentiated Services.
B. Integrated Services provides traffic preferences, but no guaranteed delivery.
C. Integrated Services uses RSVP to signal the requested level of service, whereas Differentiated Services does not use any signaling.
D. Integrated Services does not make use of any signals whereas Differentiated Services uses signals to request level of services.
E. Integrated Services uses IP Precedence whereas Differentiated Services uses the DSCP.
Answer: C
37. You are the network administrator at PassGuide . The newly appointed PassGuide trainee wants to know what are the best practices when designing a network for QoS. What will your reply be? (Choose all that apply.)
A. To color close to the application
B. To perform marking at WAN edge routers prior to packets exiting a WAN port.
C. To create a trust boundary as close as possible to the network edge.
D. To reclassify QoS settings near to the edge when devices seem dodgy and untrustworthy.
E. All of the above.
Answer: ACD
38. A CE to PE Frame Relay link is supporting VoIP and data traffic. When managed CE services are being used, which QoS mechanisms should typically be configured? (Choose four)
A. Frame Relay Traffic Shping (FRTS) on both the CE and PE
B. FRF 12 on both the CE and PE
C. WRED for all traffic classes on both the CE and PW
D. LLW on the CE and PE
E. class-based policing on the CE ingress for traffic to the customer
F. class-based policing ono the PE ingress for traffic to the customer
Answer: ABEF
39. How does CB-Shaping adapt the shaping rate when BECNs are received?
A. The shape-adaptive min-rate command adapts the shaping rate when FECN bits are received
B. Each BECN bit causes the shaping rate to be reduced by three-quarters of the previous rate, but not below the min-rate
C. When FECN bits are received, it causes the transmit shaping rate to be reduced by one-half, but not below the min-rate
D. The shaping rate will increase slowly once there have been 16 intervals of no FECNs.
Answer: B
40. Which term describes the amount of time it takes to place all of the bits in a packet onto a wire?
A. queuing delay
B. processing delay
C. propagation delay
D. serialization delay
E. prioritization delay
F. optimization delay
Answer: D
41. How is AutoQoS related to MQC?
A. AutoQoS implements classes and policies defined earlier in MQC
B. duplicates policies defined in MQC from one device to another
C. generates MQC classes and policy map templates
D. runs an interactive script to guide the administrator through MQC
Answer: C
42. The newly appointed PassGuide trainee technician wants to know what steps are used to implement QoS using Modular QoS Command Line Interface (MQC). What will your reply be? (Choose all that apply.)
A. Select an output queuing strategy using a queue map.
B. Attach the QoS traffic policy to an interface in the inbound or outbound direction.
C. Configure marking options using a route map.
D. Configure classification options using a class map.
E. Configure a QoS traffic policy by associating a QoS traffic class with a QoS feature.
Answer: BDE
43. What happens to traffic that does not have a match when using a Modular QoS Command Line Interface (MQC)?
A. It is ignored by the MQC
B. It is dropped (implicit deny all)
C. It is placed in the default class
D. It is process switched through the router
Answer: C
