Download New Latest (May) Cisco 642-457 Actual Tests 21-30

By | May 17, 2015

Ensurepass

 

QUESTION 21

You are entering the description for the Service Advertisement Framework forwarder. Which three characters should you avoid entering in the description? (Choose three.)

 

A.

< >

B.

&

C.

%

D.

#

E.

$

F.

@

 

Answer: ABC

 

 

QUESTION 22

Which device is needed to integrate H.320 into the Cisco video solution? (Source:

Introducing IP Video Telephony)

 

A.

video gateway

B.

MGCP gateway

C.

H.323 gatekeeper

D.

MCU

 

Answer: C

Explanation: Incorrect answer: ABD

As with H.323 MCUs, H.320 gateways are provisioned in Cisco Unified CallManager as H.323 gateways, and then route patterns are configured to extend calls to these devices.

Link:

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/4x/42video.html#wp1046523

 

 

QUESTION 23

Which codec is recommended by Cisco for multisite music on hold deployment that spans through the WAN links?

 

A.

G.711

B.

G.723

C.

G.729

D.

G.722

E.

G.728

F.

G.725

 

Answer: C

 

 

QUESTION 24

Which statement about enrollment in the IP telephony PKI is true? (Source: Understanding Cisco IP Telephony Authentication and Encryption Fundamentals)

 

A.

CAPF enrollment supports the use of authentication strings.

B.

The CAPF itself has to enroll with the Cisco CTL client.

C.

LSCs are issued by the Cisco CTL client or by the CAPF.

D.

MICs are issued by the CAPF itself or by an external CA.

 

Answer: A

Explanation: Incorrect answer: BCD

The CAPF enrollment process is as follows:

1. The IP phone generates its public and private key pairs.

2. The IP phone downloads the certicate of the CAPF and uses it to establish a TLS session

with the CAPF.

3. The IP phone enrolls with the CAPF, sending its identity, its public key, and an optional authentication string.

4. The CAPF issues a certicate for the IP phone signed with its private key.

5. The CAPF sends the signed certicate to the IP phone. Link:http://my.safaribooksonline.com/book/certification/cipt/9781587052613/understanding-

 

 

 

cisco-ip-telephony-authentication-and-encryption-fundamentals/584.

 

 

QUESTION 25

When Cisco Extension Mobility is implemented, which CSS is used for calling privileges?

 

A.

The user device profile line CSS combined with the device CSS of the physical phone used to log in the extension mobility user.

B.

The user device profile device CSS combined with the line CSS of the physical phone used to log in the extension mobility user.

C.

Only the user device profile device CSS is used.

D.

The combined line/device CSS of the physical phone is used to log in the extension mobility user.

E.

The combined line/device CSS of the user device profile.

 

Answer: A

 

 

QUESTION 26

DRAG DROP

 

clip_image001

Answer:

 

 

clip_image002

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 27

Which two options for a Device Mobility-enabled IP phone are true? (Choose two.)

 

A.

The phone configuration is not modified.

B.

The roaming-sensitive parameters of the current (that is, the roaming) device pool are applied.

C.

The user-specific settings determine which location-specific settings are downloaded from the Cisco Unified Communications Manager device pool.

D.

If the DMGs are the same, the Device Mobility-related settings are also applied.

 

Answer: BD

 

 

QUESTION 28

Assume that the Cisco IOS SAF Forwarder is configured correctly. Which minimum configurations on Cisco Unified Communications Manager are needed for the SAF registration to take place?

 

A.

SAF Trunk, SAF Security Profile, SAF Forwarder, and CCD Advertising Service

B.

SAF Trunk, SAF Security Profile, SAF Forwarder, and CCD Requesting Service

C.

SAF Trunk, SAF Security Profile, SAF Forwarder, CCD Requesting Service, and CCD Advertising Service

D.

SAF Trunk, SAF Security Profile, and SAF Forwarder

E.

SAF Trunk, CCD Requesting Service, and CCD Advertising Service

 

Answer: B< /span>

 

 

QUESTION 29

Refer to the exhibit.

 

clip_image003

 

clip_image004

 

 

To stream multicast MOH to the remote site across the WAN, what should the minimum value for the Max Hops be configured as?

 

A.

1

B.

2

C.

3

D.

4

 

Answer: C

Explanation:The Max Hops field in the Music On Hold (MOH) Server Configuration windowindicates the maximum number of routers that an audio source is allowed to cross. If max hops is set to zero, the audio source must remain in its own subnet. If max hops is set to one, the audio source can cross up to one router to the next subnet. Cisco recommends setting max hops to two.

Link:http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_6_1/ccmfeat/fsmoh.

html

 

 

QUESTION 30

Enabling authentication and encryption for CTI, JTAPI, and TAPI applications requires which two tasks? (Choose two.) (Source: Configuring Cisco IP Telephony Authentication and Encryption)

 

A.

Enter the encryption key into the application.

B.

Set up an IPsec association between the application and Cisco Unified CallManager.

C.

Configure related security parameters in the CTI, JTAPI, and TAPI application.

D.

Add the application user or end users to the Standard CTI Secure Connection user group, Standard CTI Allow Reception of SRTP Key Material user group, and Standard CTI Enabled user group.

 

Answer: CD

Explanation: Incorrect answer: AB

You must also add the application users or the end users to the Standard CTI Secure Connection user group in Cisco Unified Communications Manager Administration to enable TLS for the application. After you add the user to this group and install the certificate, the application ensures that the user connects via the TLS port. Link:http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/security/8_6_1/secugd/secuct

 

 

 

i.html#wp1166397

 

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