[Free] 2017(Apr) Ensurepass Passguide Cisco 400-051 Latest Dumps 61-70

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CCIE Collaboration Written Exam

QUESTION 61

Which two data frame lengths are supported by iLBC? (Choose two.)

 

A.

10 milliseconds

B.

20 milliseconds

C.

30 milliseconds

D.

40 milliseconds

E.

50 milliseconds

F.

60 milliseconds

 

Correct Answer: BC

Explanation:

iLBC-Internet Low Bit Rate Codec (iLBC) provides audio quality between that of G.711 and G.729 at bit rates of 15.2 and 13.3 kb/s, while allowing for graceful speech quality degradation in a lossy network due to the speech frames being encoded independently. By comparison, G.729 does not handle packet loss, delay, and jitter well, due to the dependence between speech frames. iLBC is supported for SIP, SCCP, H323, and MGCP devices.

 

 

QUESTION 62

Refer to the exhibit. A user is going through a series of dialing steps on a SIP Type B IP phone (for example, a Cisco 7975) to call an SCCP IP phone. Both phones are registered to the same Cisco Unified Communications Manager cluster. Assuming the calling SIP phone is associated with a SIP dial rule with a pattern value of 2001, which statement about how digits are forwarded to Cisco Unified Communications Manager for further call processing is true?

 

clip_image002

 

A.

As each digit is pressed on the SIP IP phone, it is sent to Cisco Unified Communications Manager in a SIP NOTIFY message as a KPML event.

B.

The SIP IP phone will wait for the interdigit timer to expire, and then send each digit to Cisco Unified Communications Manager as a separate KPML event in a SIP NOTIFY message.

C.

The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending all digits to Cisco Unified Communications Manager in a SIP INVITE message.

D.

The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending the first digit in a SIP INVITE and the subsequent digits in SIP INFORMATION messages.

E.

The SIP IP phone will wait for the interdigit timer to expire, and then send all digits to Cisco Unified Communications Manager in a SIP INVITE message.

 

Correct Answer: E

Explanation:

Cisco Type B SIP Phones offer functionality based SIP INVITE Message. Every key the end user presses triggers an individual SIP message. The first event is communicated with a SIP INVITE, but subsequent messages use SIP NOTIFY messages. The SIP NOTIFY messages send KPML events corresponding to any buttons or soft keys pressed by the user. Cisco Type B SIP IP Phones with SIP dial rules operate in the same manner as Cisco Type A phones with dial rules.

 

 

QUESTION 63

You have implemented 5-digit forced authorization codes to all international route patterns on Cisco Unified Communications Manager. Your users report that after entering the FAC codes, they must wait for more than 10 seconds before the call is routed. Which procedure eliminates the wait time?

 

A.

Check and eliminate any existing route patterns that overlap with the international route pattern.

B.

Go to the Cisco Unified Communications Manager Service Parameters and reduce the T-304 number to 5000 milliseconds.

C.

Request your long distance telephone service provider to reduce the call setup time to 5 seconds.

D.

Configure a # (hash) sign to the end of the forced authorization codes to signal the end of dialing.

E.

Educate the users to press # (hash) after entering the forced authorization codes.

 

Correct Answer: E

Explanation:

Because it immediately stops taking digits and route the digits to CUCM, otherwise the call occurs after the interdigit timer expire which is 15 seconds by default.

 

Reference:

http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/81541-fac-config-ex.html

 

 

QUESTION 64

Which two statements about BFCP with Cisco Unified Communications Manager are true? (Choose two.)

 

A.

BFCP is supported only on full SIP networks.

B.

Cisco Unified Communications Manager allows BFCP only over UDP.

C.

BFCP is not supported for third-party endpoints.

D.

BFCP is not supported through Cisco Unified Border Element.

E.

BFCP is supported between Cisco Unified Communications Manager and a TelePresence MCU.

 

Correct Answer: AB

Explanation:

BFCP configuration tips

To enable BFCP in Cisco Unified Communications Manager, check the Allow Presentation Sharing using BFCP check box in the SIP Profile Configuration window. If the check box is unchecked, all BFCP offers will be rejected. By default, the check box is unchecked. BFCP is supported only on full SIP networks. For presentation sharing to work, BFCP must be enabled for all SIP endpoints as well as all SIP lines and SIP trunks between the endpoints.

CUCM uses BFCP over user datagram protocol (UDP) in both secure and non-secure BFCP modes.

 

Reference:

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/9_0_1/ccmsys/CUCM_ BK_CD2F83FA_00_cucm-system-guide-90/CUCM_BK_CD2F83FA_00_system-guide_chapter_0101011.html

 

 

QUESTION 65

Which statement about the effective path in the Enhanced Location Call Admission Control mechanism on Cisco Unified Communications Manager is true?

 

A.

It is a sequence of links and intermediate locations that connect a pair of locations.

B.

It is used to define the bandwidth that is available between locations.

C.

Only one effective path is used between two locations.

D.

There could be multiple effective paths between a pair of locations.

E.

It logically represents the WAN link.

 

Correct Answer: C

Explanation:

The effective path is the path used by Unified CM for the bandwidth calculations, and it has the least cumulative weight of all possible paths. Weights are used on links to provide a “cost” for the “effective path” and are pertinent only when there is more than one path between any two locations.

 

 

QUESTION 66

Refer to the exhibit. On which two Cisco Unified CM Administration pages can a system administrator define MTU for an SSL VPN tunnel connecting between a Cisco IP phone and a Cisco IOS VPN gateway? (Choose two.)

 

clip_image004

 

A.

VPN Profile

B.

VPN Group

C.

VPN Gateway

D.

VPN Feature Configuration

E.

System, followed by Enterprise Parameters

F.

System, followed by Enterprise Phone Configuration

 

Correct Answer: AD

Explanation:

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/8_5_1/secugd/sec-851-cm/secvpfet.html

 

 

QUESTION 67

What is the amount of audio bandwidth, in kilobits per second, that is used in the Cisco Unified Communications Manager location bandwidth calculation for a G.728 call?

 

A.

8

B.

16

C.

24

D.

29

E.

80

 

Correct Answer: B

Explanation:

G.728–Low-bit-rate codec that video endpoints support. It support kilobits per second.

QUESTION 68

Which statement describes the Maximum Serving Count service parameter of the Cisco TFTP service on Cisco Unified Communications Manager?

 

A.

It specifies the maximum number of files in the TFTP server disk storage.

B.

It specifies the maximum number of TFTP client requests to accept and to serve files at a given time.

C.

It specifies the maximum file support by the Cisco TFTP service.

D.

It specifies the maximum file counts, in cache as well as in disk, that are supported by the Cisco TFTP service.

E.

It specifies the maximum number of TFTP client requests to accept and to serve files in a 120-minute window.

 

Correct Answer: B

Explanation:

This parameter specifies the maximum number of client requests to accept and to serve files at a time. Specify a low value if you are serving files over a low bandwidth connection. You can set it to a higher number if you are serving small files over a large bandwidth connection and when CPU resources are available, such as when no other services run on the TFTP server. Use the default value if the TFTP service is run along with other Cisco CallManager services on the same server. Use the following suggested values for a dedicated TFTP server: 1500 for a single-processor system and 3000 for a dual-processor system. If the dual-processor system is running Windows 2000 Advanced Server, the serving count can be up to 5000.

This is a required field.

Default: 200.

Minimum: 1.

Maximum: 5000.

 

 

QUESTION 69

Which method does a Cisco Unified 9971 phone use to send keep-alive messages to Cisco Unified Communications Manager?

 

A.

SIP NOTIFY with Event set to keep-alive

B.

SIP OPTIONS

C.

SIP REGISTER with Expires set to zero

D.

SCCP StationRegister

E.

SCCP StationServerReq

 

Correct Answer: C

Explanation:

Phone registers with primary and establishes keepalive connection with secondary. Expires = 0 keepalive mechanism allows Cisco SIP Phones to more closely resemble the failover / fallback behavior of SCCP.

 

 

QUESTION 70

When the Cisco Unified Communications Manager service parameter “Auto Call Pickup Enabled” is selected, which two softkeys on an IP phone connect you to an incoming call? (Choose two.)

 

A.

Pickup

B.

Gpickup

C.

CallBack

D.

Select

E.

Join

 

Correct Answer: AB

Explanation:

Pickup softkey is used to receive a call that is ringing in another phone within the same pickup group and Gpickupsoftkey is used to receive calls that are ringing but that phone is another pickup group.

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