Download New Latest (May) Cisco 642-742 Actual Tests 41-50

By | May 17, 2015

Ensurepass

 

QUESTION 41

Which statement describes the benefit of WMM U-APSD over legacy 802.11 power-save mode?

 

A.

Client can burst data without standard interframe spacing.

B.

Client can burst data without ACKs.

C.

Client no longer sends null frame to notify of sleep mode.

D.

Client sleep mode is scheduled by AP to reduce jitter.

 

Answer: A

 

 

QUESTION 42

What is the minimum overhead (header plus FCS) added by 802.11 (no encryption, no WMM) between a wireless client and an AP?

 

A.

18 B

B.

24 B

C.

28 B

D.

35 B

E.

36 B

F.

48 B

 

Answer: C

 

 

QUESTION 43

WLC v7.0 is configured for multicast with WLC-to-AP multicast mode, using IP address 239.10.10.10 and IGMP snooping enabled, with all other parameters set to default. What QoS value is given to multicast traffic between a WLC and APs?

 

A.

CS6

B.

EF

C.

CS5

D.

CS4

E.

CS3

F.< /font>

CS2

G.

CS1

H.

BE

 

Answer: H

 

 

QUESTION 44

In order to place a call, what is the first step that a wireless phone must do?

 

A.

Associate with the wireless infrastructure.

B.

Authenticate with the web authentication server.

C.

Update its firmware with the Call Manager.

D.

Register with a call agent.

 

Answer: A

 

 

QUESTION 45

DRAG DROP

 

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Answer:

clip_image002

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 46

Refer to the exhibit.

 

 

 

clip_image003

 

Which two statements describe information that you can derive from the WCS v7.0 output from the Monitor Client Detail? (Choose two.)

 

A.

Comparing the RSSI and SNR can provide specific information on where the client has roamed and if there is a problem with one or more AP configurations.

B.

Comparing the information to the location of the client can provide the first hint of voice- related issues.

C.

If the parameters are consistently good, then voice-related issues being reported by users are probably not related to RF parameters.

D.

Comparing the RSSI and SNR can provide specific information on QoS performance in the VoWLAN.

E.

Comparing the RSSI and SNR can provide specific information on the relative distance of the client from the AP during a call.

 

Answer: BC

 

 

QUESTION 47

What is the recommended minimum speed at the edge of the cells in an 802.11g network for a good Cisco VoWLAN deployment?

 

A.

11 Mb/s

B.

12 Mb/s

C.

18 Mb/s

D.

36 Mb/s

E.

54 Mb/s

 

Answer: B

 

 

QUESTION 48

Controllers in a mobility group must all have which of these characteristics in common?

 

A.

mobility group name, version of controller code, and Control and Provisioning of Wireless Access Points mode

B.

mobility domain name, version of controller code, Control and Provisioning of Wireless Access Points mode, ACLs, and WLANs (SSIDs)

C.

mobility group name, version of controller code, Control and Provisioning of Wireless Access Points mode, ACLs, and WLANs (SSIDs)

D.

mobility domain name, version of controller code, and Control and Provisioning of Wireless Access Points mode

 

Answer: C

 

 

QUESTION 49

How much overhead is added by CAPWAP encapsulation?

 

A.

4 B

B.

14 B

C.

28 B

D.

44 B

E.

50 B

F.

60 B

 

Answer: F

 

 

QUESTION 50

Your Cisco Unified Wireless IP Phones 7921G and 7925G are associated with the VoWLAN at your branch office. When they attempt to place a call, the call fails to go through and you receive a fast busy tone. What is the issue?

 

A.

The wireless phones failed to register with the Cisco Unified Communications Manager cluster.

B.

The Cisco Unified Communications Manager cluster invoked CAC to preserve IP WAN voice bandwidth.

C.

The local gateway rejected the call because of high IP WAN utilization.

D.

Automatic alternate routing has been invoked.

 

Answer: B

 

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