Cisco 642-642

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QUESTION 50
Drop A.

B.
C.
D.

Correct Answer: Section: (none) Explanation
Explanation/Reference:
QUESTION 51
Which two different traffic types have the most similar sensitivity to latency, jitter, and packet loss? (Choose two.)
A. SQL transactions
B. voice
C. voice signaling
D. streaming video
E. video conferencing
F. peer-to-peer file sharing

Correct Answer: BE Section: (none) Explanation
Explanation/Reference:
QUESTION 52
Hotspot
A.

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QUESTION 51
Which 3 options may be used on Cisco Catalyst switches for classifying IP Packets? (Choose 3)
A. 802.1Q
B. ISL CoS
C. Priority
D. MED
E. 802.1E

Correct Answer: ABC Section: (none) Explanation
Explanation/Reference:
QUESTION 52
Which three QoS markers can be set using class-based marking? (Choose three.)
A. discard-threshold
B. qos-group
C. mpls exp bits
D. cos
E. becn
F. fecn

Correct Answer: BCD Section: (none) Explanation
Explanation/Reference:
Explanation: Class-based Marking supports following markers: 1) IP precedence 2) DSCP 3) QoS group 4) MPLS expertimental bits 5) ATM CLP bit 6) Frame Relay DE bit 7) 802.1Q/ISL cos/priority Reference: IP QoS Introduction p.64
QUESTION 53
Based on Cisco’s

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QUESTION 1
Which organization developed and maintains the Universal Mobile Telecommunications System?
A. 3GPP2
B. 3GPP
C. ITU
D. ANSI
Correct Answer: B
QUESTION 2
Which two services does GPRS support? (Choose two.)
A. MMS
B. SMS
C. Video Calling

D. EMM
E. ESM
Correct Answer: AB
SS7 GTT_MAP
QUESTION 1
Which part of the OSI model containsthe Signalling Connection Control Part protocol?

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Exam A
QUESTION 1
In an unmanaged CE router implementation, how does the service provider enforce the SLA?
A. by using class-based policing on the CE to PE link to limit the customer’s input rate
B. by marking on the CE to PE link and using CBWFQ and CB-WRED on the PE to P link
C. by marking on the CE to PE link and using class-based policing on the PE to P link
D. by using class-based random discard on the CE to PE link to limit the customer’s

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Exam A QUESTION 1
Which of the following markers can be set by Committed Access Rate (CAR)? (Choose all that apply.)
A. DSCP bits
B. QoS Group
C. ATM CLP bit
D. Frame Relay DE bit
E. IP precedence bits

Correct Answer: ABE Section: (none) Explanation
Explanation/Reference:
Explanation:

Source: Cisco IP QoS Introduction, Page 64

QUESTION 2
What makes the DiffServ model more scalable than the IntServ model? (Choose all that apply.)
A. DiffServ makes use of per-aggregate QoS instead of per-flow QoS.

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Exam A
QUESTION 1
Based on the following 2950 switch configurations, which statement is correct?
no wrr-queue cos-mapwrr-queue bandwidth 20 10 70 1wrr-queue cos-map 4 5wrr-queue cos-map 1 0 1 2 3wrr-queue cos-map 3 6 7
A. Queue 1 is setup asthe expedite queue.

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