Download New Latest (May) Cisco 642-457 Actual Tests 1-10

Ensurepass

Exam A

 

QUESTION 1

How is a SIP trunk in Cisco Unified Communications Manager configured for SIP precondition?

 

A.

The configuration is done by selecting a SIP precondition trunk for trunk type.

B.

The configuration is automatically selected when RSVP is enabled for the location assigned to the trunk.

C.

SIP precondition is configured by selecting E2E for RSVP over SIP on the default SIP profile assigned to the SIP trunk.

D.

SIP precondition is configured by configuring a new SIP profile and selecting E2E for RSVP over SIP. The new SIP profile must then be assigned to the SIP trunk.

 

Answer: D

 

 

QUESTION 2

While configuring Call Survivability in Cisco Unified Communications Manager, what step is mandatory to reach remote sites while in SRST mode?

 

A.

Enable Cisco Remote Site Reachability.

B.

Configure CFUR.

C.

Enable the SRST checkbox in the MGCP gateway.

D.

Configure the H.323 gateway for SRST in Cisco Unified Communications Manager.

E.

Enable the Failover Service parameter.

 

Answer: B

Explanation: Incorrect answer: ACDE

Call Forward Unregistered (CFUR) functionality provides the automated rerouting of calls through the PSTN when an endpoint is considered unregistered due to a remote WAN link failure

Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/models.html

 

 

QUESTION 3

Refer to the exhibit.

 

 

 

clip_image001

 

Assume a centralized Cisco Unified Communications deployment with the headquarters in the U.

K.and remote site in RTP. All route patterns are assigned a route list that points to the local route group. Local route groups have been configured on the U.K and RTP device pools. A U.

K.user logs onto an RTP phone using the Cisco Extension Mobility feature and places an emergency call to 0000. Which statement about the emergency call is true?

 

A.

The call will match the U.K_Emergency route pattern partition and will egress at the RTP gateway.

B.

The call will match the U.K_Emergency route pattern partition and will egress at the U.K.

gateway.

C.

The call will match the RTP_Emergency route pattern partition and will egress at the U.

K.gateway.

D.

The call will match the RTP_Emergency route pattern partition and will egress at the RTP gateway.

E.

The call will fail.

 

Answer: A

 

 

QUESTION 4

Which two formats are supported by Cisco Unified Communications Manager to stream music on hold? (Choose two.)

 

A.

G.711

B.

G.729

C.

G.723

D.

G.722

E.

G.728

F.

Advanced Audio Codec

 

Answer: AB

 

 

QUESTION 5

Refer to the exhibit.

 

clip_image002

 

How many calls are permitted by the RSVP configuration?

 

A.

one G.711 call

B.

two G.729 calls

C.

one G.729 call and one G.711 call

D.

eight G.729 calls

E.

four G.729 calls

 

An
swer:
B

Explanation: Incorrect answer: ACDE

In performing location bandwidth calculations for purposes of call admission control, Cisco Unified Communications Manager assumes that each call stream consumes the following amount of bandwidth:

 

 

 

·G.711 call uses 80 kb/s.

·G.722 call uses 80 kb/s.

·G.723 call uses 24 kb/s.

·G.728 call uses 26.66 kb/s.

·G.729 call uses 24 kb/s.

 

Link:

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_6_1/ccmsys/a02cac.html #wpxref28640

 

 

QUESTION 6

Refer to the exhibit.

 

clip_image003

 

Which CSS is used at the HQ Cisco Unified Communications Manager to reroute calls via the PSTN when the SAF network is unavailable?

 

A.

the phone device CSS

B.

the phone line CSS

C.

the phone line/device combined CSS

D.

the SAF CSS configured on the CCD requesting service

E.

the phone AAR CSS configured at the phone device

F.

No special CSS is required. If SAF patterns are accessible, the PSTN reroute is automatic.

 

Answer: E

 

 

QUESTION 7

How many active gatekeepers can you can define in a local zone?

 

A.

1

B.

2

C.

5

D.

10

E.

15

F.

unlimited

 

Answer: A

 

 

QUESTION 8

Which action is performed by the Media Gateway Control Protocol gateway when it loses connectivity with the primary and backup Cisco Unified Communications Manager servers?

 

A.

The gateway continues to make an attempt to connect to the backup Cisco Unified Communications Manager server.

B.

The gateway falls back to the H.323 protocol for further call processing.

C.

The gateway continues with the MGCP call processing without any interruption.

D.

The gateway waits for the primary Cisco Unified Communications Manager server to come alive.

E.

All MGCP call processing is interrupted until the Cisco Unified Communications Manager servers are online.

F.

The MGCP calls are queued up until the Cisco Unified Communications Manager servers are online.

 

Answer: B

 

 

QUESTION 9

Which process can localize a global E.164 with + prefix calling numbers for inbound calls to an IP phone so that users see the calling number in a local format?

 

A.

Calling number localization is done using translation patterns.

B.

Calling number localization is done using route patterns.

C.

Calling number localization is done by configuring a calling party transformation CSS at the phone.

D.

Calling number localization is done by configuring a calling party transformation CSS at the gateway.

E.

Calling number localization is done by configuring the phone directory number in a localized format.

 

Answer: C

 

 

QUESTION 10

Which interface can you use to configure alarms and traces in Cisco Unified Communications Manager?

 

A.

Cisco Unified Reporting

B.

Cisco Unified Serviceability

C.

Cisco Unified Communications Manager Administration

D.

disaster recovery system

E.

Cisco Unified OS Administration

F.

real-time monitoring

 

Answer: B

 

Free VCE & PDF File for Cisco 642-457 Real Exam

Instant Access to Free VCE Files: CCNA | CCNP | CCIE …
Instant Access to Free PDF Files: CCNA | CCNP | CCIE …