Latest Cisco CCIE 350-050 Real Exam Download 201-210

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QUESTION 201

When designing a WLAN network using Cisco 1142 APs to support both voice services (Cisco 7921 IP Phones) and data services, what design principles are true? (Choose 2)

 

A.

802.11n data rates should be enabled to improve overall performance even if the Cisco 7921 IP Phones

do not support 802.11n data rates.

B.

802.11n data rates should not be enabled as the Cisco 7921 IP Phones are not 802.11n capable. As such,

no performance improvement is expected for the voice clients upon enabling 802.11n data rates.

C.

Ensure proper floor coverage to ensure good voice quality (-67 dBm, 20% cell overlap, and 19 dB channel

separation).

D.

-67 dBm, 20% cell overlap, and 19 dB channel separation is impossible to achieve. Therefore, a site survey

to ensure required RSSI coverage is top priority to ensure good voice quality.

E.

RRM should not be used as it is not designed for wireless voice services and will adjust the channel and

Tx power settings to non optimized values for voice services.

F.

RRM should be used because it is the only way to ensure that channel and Tx power are configured to

support voice services.

 

Answer: AC

 

 

QUESTION 202

Resource Reservation Control (RRC) provides enhanced capabilities to manage admission and policy controls when deploying VideoStream on a Cisco Unified Wireless Network. Which statement correctly states the decision making process RRC goes through to admit or deny a client from joining a stream?

 

A.

RRC initiates admission and policy decisions based on the radio resource measurements, traffic

statistics measurement, and system configurations. The WLC initiates RRC requests to the APs

for the IGMP join.

B.

The WLC processes IGMP join requests after checking all the parameters, including client count,

channel utilization, latency, QoS, and client link rates.

C.

RRC algorithm periodically checks if conditions have changed. If a policy is violated, the client will

be denied to the stream immediately. When the condition improves, the client will be admitted to join again.

D.

RRC algorithm will check and ensure the conditions are optimal before the client gets admitted.

If the conditions are only partially satisfied, the client will be admitted but will have a better QoS

priority to protect the stream quality.

E.

RRC is a control mechanism to ensure good connection quality for a video stream via multicast.

Clients that do not satisfy all conditions will always be admitted as best effort clients. Clients that

do not get admitted 3 times within a specific time period, are denied access to the stream.

 

Answer: A

 

 

QUESTION 203

Which two statements are true regarding the location tracking history on the Cisco 3300 Series Mobility Services Engine? (Choose two.)

 

A.

By default, the historical data is archived for 30 days.

B.

The history of an element is recorded if it moves more than 5 meters (or 15 feet).

C.

The history of an element is recorded if it moves across floors.

D.

History logging is enabled by default.

E.

An element is removed from the tracking table after one hour of inactivity.

 

Answer: AC

 

 

QUESTION 204

When designing a WLAN network to support both voice and context-aware services, which set of design principles should you follow?

 

A.

An AP must be placed at the perimeter and in each of the four corners of the floor. All APs must be

enabled to ensure proper coverage on the floor to provide -67 dBm, 20 percent celloverlap, and 19 dB

channel separation.

B.

An AP must be placed at the perimeter and in each of the four corners of the floor. Some APs may be

disabled to ensure proper coverage on the floor to provide -67 dBm, 20 percent celloverlap, and 19 dB

channel separation.

C.

An AP must be placed at the perimeter and in each of the four corners of the floor to ensure proper

coverage on the floor to provide -67 dBm, 20 percent cell overlap, and 19 dB channel separation.

Some APs may be in monitor mode.

D.

If a conflict occurs between the AP placement for voice design and for context-aware location design,

then the voice design should take precedence, to protect against delays and dropping of sensitive

voice traffic.

E.

In a design that includes both voice and context-aware services, voice design always requires more

APs to be deployed to ensure -67 dBm coverage, 20 percent cell overlap, 19 dB channel separation,

and proper capacity planning.

F.

In a design that includes both voice and context-aware services, voice design should take precedence

to avoid co-channel interference, which can negatively affect voice quality. Voice design also requires -67

dBm coverage, 20 percent cell overlap, and 19 dB channel separation, which is more difficult to achieve.

 

Answer: C

 

 

QUESTION 205

When deploying the Cisco Unified Wireless IP Phone 7925 running firmware release 1.3.4 on a Cisco Unified architecture, which features should you enable to support fast secure roaming while maintaining a scalable deployment?

 

A.

The controller supports PKC, so use WPA2 802.1X.

B.

The controller does not support PKC, so use WPA2 PSK.

C.

The controller does not support OKC, so use WPA2 PSK.

D.

The 7925 does not support WPA2 with Cisco CKM, so use WPA2 PSK.

E.

The 7925 supports WPA2 with Cisco CKM, so use WPA2 802.1X.

F.

The 7925 supports PKC, so use WPA2 802.1X.

 

Answer: E

 

 

QUESTION 206

Refer to the exhibit. Looking at the packet capture between the client and AP during a voice troubleshooting session, what can you learn?

 

clip_image002

 

A.

The 802.1p COS value is marked as 5, which typically is used for the voice traffic that is encoded

in G711.

B.

IP precedence is marked as 5 for the voice traffic that is encoded in G711, with a corresponding

802.11e UP marking of 6.

C.

The WMM UP value is marked as 5, which typically is used for the voice traffic that is encoded in

G711, and DSCP is marked as EF.

D.

IP precedence is marked as 5, with a corresponding 802.11e UP marking of 6 and a correct DSCP

marking to EF; the voice traffic is encoded in G711.

E.

The 802.1p COS value is marked as 5, with a correct DSCP marking to EF, and the voice traffic is

encoded in G711.

F.

WMM UP marking is marked as 5, which typically is used for video traffic; this voice traffic stream is

encoded in G711, and DSCP is marked as EF.

 

Answer: F

 

 

QUESTION 207

To support efficient bandwidth utilization for broadcasting multicast packets to all WLANs on the AP, which two mechanisms can you configure on the Cisco WLCs? (Choose two.)

 

A.

VideoStream can be used to convert multicast transmissions to broadcast transmissions at the AP,

to enable the AP to receive ACKs from the clients and to determine the frames that need to be retransmitted.

B.

VideoStream can be used to convert multicast transmissions to unicast transmissions at the AP.

The same data rate will be used, but the unicast stream allows the AP to receive ACKs from the clients

and to determine the frames that need to be retransmitted.

C.

RRC in a Cisco WLC will use channel utilization as a metric to determine capacity and perform admission

control, but it does not deny requests that would cause oversubscription.

D.

RRC in a Cisco WLC will use channel utilization as a metric to determine capacity and perform admission

control, and it denies requests that would cause oversubscription by sending SAP messages to clients on drop.

E.

VideoStream can be used to convert multicast transmission to unicast transmission at the AP.

Because of the unreliable nature of wireless media, no ACKs are expected from the clients; however,

unicast transmission will effectively reduce multicast PLR to between 0.1 and 0.5 percent.

F.

VideoStream can be used to convert multicast transmission to unicast transmission at the AP, to enable

the AP to receive ACKs from the clients and to determine the frames that need to be retransmitted.

 

Answer: DF

 

 

QUESTION 208

You are testing newly purchased Cisco Wireless IP Phones on your wireless network on the 5 GHz band. You notice that there are audio gaps during roaming. Troubleshooting network engineers find out that the issue is caused by the use of Dynamic WEP on the SSID. Why is this use a problem?

 

A.

Dynamic WEP is incompatible with the Cisco Wireless IP Phones.

B.

Dynamic WEP requires a full authentication with the RADIUS server during roaming.

C.

Dynamic WEP provides the same WEP key to several phones simultaneously, which can cause delays

if a phone needs to wait for its slot time.

D.

Dynamic WEP requires use of 2.4 GHz on the phones.

 

Answer: B

 

 

QUESTION 209

A hospital has four Cisco WLCs, a WCS, and an MSE. All devices are correctly synchronized via the WCS. You have been called to inspect a location tracking problem. In some areas, tracked elements are being reported on wrong floors. After troubleshooting, you find out that the hospital building does not provide enough interfloor attenuation.

What is the best way to solve the problem?

 

A.

Assign a separate WLC to each floor in order to make sure that tags do not get reported on wrong floors.

B.

Do not use more than 10 APs on each floor. Using more than 10 causes signals to propagate across

floors and pushes tags to wrong floors.

C.

Vertically align APs across floors for better accuracy.

D.

Turn on Cisco Compatible Extensions location measurements on the WLC to enhance location accuracy.

 

Answer: C

 

 

QUESTION 210

Which two statements are true regarding the VideoStream functionality on the WLC? (Choose two.)

 

A.

It applies to any multicast video streams available on the network.

B.

It enables broadcasting the video stream using 802.11n HT data rates.

C.

It applies only to the configured media streams.

D.

It converts the multicast video stream into unicast to be sent directly to clients at the WLC level.

E.

It delivers reliable video multicast by having the receiver clients acknowledge the 802.11 multicast video

data frames on the air.

F.

The AP replicates the multicast video frames into 802.11 unicast frames to be sent directly to wireless

clients at their individual data rate.

 

Answer: CF

 

 

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