[Free] Download Latest (May 2016) Cisco 642-742 Real Exam 11-20

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QUESTION 11

Which four statements describe the attributes of streaming video? (Choose four.)

 

A.

Packet loss is limited to 1 percent.

B.

Packet loss is limited to 5 percent.

C.

One-way latency is limited to 150 ms.

D.

One-way latency is limited to a few seconds.

E.

Jitter is limited to 30 ms.

F.

Jitter has no significant requirements.

G.

QoS marking is at CS4.

H.

QoS marking is at AF41.

 

Correct Answer: BDFG

 

 

 

 

QUESTION 12

What is the best practice for configuring data rates for an 802.11a VoWLAN deployment?

 

A.

Configure mandatory data rates of 9 and 54 Mb/s. Disable data rates below 6 Mb/s and all other data rates as supported.

B.


Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s and configure all other data rates as supported.

C.

Configure a mandatory data rate of 54 Mb/s. Disable data rates below 36 Mb/s and configure all other data rates as supported.

D.

Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s and all other data rates as supported.

 

Correct Answer: D

 

 

QUESTION 13

VoWLAN implementation plans for a current mix of existing Cisco Unified Wireless IP Phones 7920G and 7921G to a final migration of Wireless IP Phones 7925G in a single WLAN. What would be the most appropriate WLC WLAN configuration to end with Wireless IP Phones 7925G?

 

A.

7920 Client CAC = enabled only; Radio Policy = All; WMM = Disabled

B.

7920 AP CAC = enabled only; Radio Policy = All; WMM = Allowed

C.

7920 Client CAC = enabled only; Radio Policy = 802.11a only; WMM = Disabled

D.

7920 AP CAC = enabled only; Radio Policy = 802.11a only; WMM = Allowed

E.

7920 Client CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Disabled

F.

7920 AP CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Allowed

 

Correct Answer: B

 

 

QUESTION 14

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.

 

Correct Answer: B

 

 

QUESTION 15

Which two attributes can be enabled for checking by the Voice Audit Tool in Cisco WCS v7.0? (Choose two.)

 

A.

-67 dBm cell edge

B.

MOS

C.

TSM

D.

DHCP

E.

25 dB SNR

Correct Answer: CD

 

 

QUESTION 16

WLCs v7.0 have been configured for multicast and IGMP snooping enabled, with all other parameters set to default. A wireless client actively receiving a multicast group roams from WLC1 to WLC2, both of which are configured for the client IP subnet. Which statement describes the roaming process?

 

A.

There is no required action from the client and WLC2 becomes the local anchor controller.

B.

A new IGMP packet is required from the client and WLC2 becomes the local anchor controller.

C.

There is no required action from the client and WLC2 becomes foreign controller and WLC1 becomes anchor controller.

D.

A new IGMP packet is required from the client and WLC2 becomes foreign controller and WLC1 becomes anchor controller.

 

Correct Answer: A

 

 

QUESTION 17

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

 

clip_image002

 

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.

 

Correct Answer: BC

 

 

QUESTION 18

Which two security technologies should be used when deploying a 100 Wi-Fi phone installation? (Choo
se two.)

 

A.

Use WPA-PSK.

B.

Use IEEE 802.1X with unique users on each phone.

C.

Use the same IEEE 802.1X username on all phones.

D.

Use IEEE 802.1X and WEP 128.

E.

Use IEEE 802.1X and WEP 256.

F.

Use IEEE 802.1X and WPA2 and Cisco Centralized Key Management.

 

Correct Answer: BF

 

 

QUESTION 19

A customer wants FSR and certificate-based authentication. The solution must be simple to deploy. Which method should be used to meet the requirements?

 

A.

EAP-TLS

B.

PEAP-MSCHAPv2

C.

EAP-FAST

D.

PEAP-MSCHAPv2 machine authentication

 

Correct Answer: C

 

 

QUESTION 20

Which two items enable WMM to expedite frames from respective traffic categories? (Choose two.)

 

Consistent CWmin and CWmax values

 

Dynamic CWmin and CWmax values

 

A.

AIFS

B.

SIFS

C.

PIFS

D.

DIFS

E.

U-APSD

F.

PS-Poll

Correct Answer: BC

 

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