[Free] Download Latest (May 2016) Cisco 642-742 Real Exam 101-110

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QUESTION 101

Assuming 30% total overhead and no other clients on an AP, how many single stream 802.11n 2.4GHz IP cameras that output a 6 Mbps video feed could one 802.11n AP support?

 

A.

4 cameras

B.

8 cameras

C.

12 cameras

D.

16 cameras

 

Correct Answer: B

 

 

QUESTION 102

Refer to the exhibit. Which three statements describe the WLC configuration? (Choose
three.)

 

clip_image001

 

A.

CAC values are relatively high.

B.

CAC values are relatively low.

C.

It enables QBSS, given other appropriate configurations.

D.

It enables TSPEC, given other appropriate configurations.

E.

It applies to platinum QoS.

F.

It applies to platinum and gold QoS.

 

Correct Answer: ADE

 

 

QUESTION 103

Which two applications benefit from upgrading to 802.11n? (Choose two.)

 

A.

voice

B.

video

C.

database access

D.

digital imaging

E.

SMS

F.

email

 

Correct Answer: BD

 

 

 

 

 

 

QUESTION 104

Refer to the exhibit. An engineer has performed a packet capture on a wireless voice user who is experiencing connectivity problems. Which problem does the exhibit display?

 

clip_image003

 

A.

dropped call< /p>

B.

no audio

C.

one-way audio

D.

choppy audio

E.

delays in voice conversation

 

Correct Answer: C

 

 

QUESTION 105

A customer has upgraded to 802.11n with ClientLink, set to defaults, to improve video performance on legacy clients. They notice that ClientLink is not kicking in for an 802.11a client with 36 Mb data rate and -55db RSSI. What is the problem?

 

A.

data rate too high

B.

data rate too low

C.

RSSI too high

D.

RSSI too low

 

Correct Answer: C

 

 

QUESTION 106

Which statement best describes the ideal VoWLAN design?

 

A.

smaller cells with all data rates enabled to ensure that all clients can associate

B.

smaller cells with higher data rates enabled and admission control enabled through WMM

C.

larger cells with higher data rates enabled and WPA2 to secure voice conversations

D.

smaller cells with higher data rates enabled and no overlap to prevent co-channel interference

 

Correct Answer: B

 

 

 

 

 

 

 

QUESTION 107

A Cisco WLC v7.0 is properly configured for 802.11n and multicasting video without the optional Cisco VideoStream. Which three options best describe the frames that are sent from the AP to the wireless clients? (Choose three.)

 

A.

unicast to subscribed clients

B.

multicast to subscribed clients

C.

After startup, throughput is consistent.

D.

After startup, throughput can vary over time.

E.

retransmission upon failure of delivery

F.

no retransmission

 

Correct Answer: BDF

 

 

QUESTION 108

After debugging a VoWLAN client that is experiencing dropped calls, it has been found that the client is requesting a new DHCP address every time the client roams to a new AP.

What should be configured in the WLAN?

 

A.

Select the DHCP server override option.

B.

Decrease the DHCP allocated lease time to 0.

C.

Deselect the DHCP address assignment required option.

D.

Select the central DHCP processing option.

E.

Increase the DHCP allocated lease time for wireless clients.

F.

Deselect the enable session timeout.

 

Correct Answer: C

 

 

QUESTION 109

Which WCS tool will be especially helpful to ensure that all VoWLAN configurations are consistent across all controllers?

 

A.

Inspect VoWLAN Readiness

B.

Traffic Stream Metrics

C.

Voice Audit Report

D.

Voice Diagnostic

E.

Monitor Client Detail

 

Correct Answer: C

 

 

QUESTION 110

DSCP and 802.1p belong to which two layers of the OSI model? (Choose two.)

 

A.

Layer 1

B.

Layer 2

C.

Layer 3

D.

Layer 4

E.

Layer 5

F.

Layer 6

G.

Layer 7

Correct Answer: BC

 

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