[2021-New] Cisco 400-051 Dumps With Update Exam Questions (8-17)

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New Cisco 400-051 Exam Dumps Collection (Question 8 - Question 17)

New Questions 8

What is the maximum one-way delay, in milliseconds, between any two Cisco Unified Communications Manager servers in a non-Session Management Edition cluster over an lP WAN?

A. 20

B. 40

C. 80

D. 160

E. 250

Answer: B

Explanation:

The maximum one-way delay between any two Unified CM servers should not exceed 40 msec, or 80 msec round-trip time. Propagation delay between two sites introduces 6 microseconds per kilometer without any other network delays being considered. This equates to a theoretical maximum distance of approximately 3000 km for 20 ms delay or approximately 1860 miles. These distances are provided only as relative guidelines and in reality will be shorter due to other delay incurred within the network.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/7x/uc7_0/models.html

New Questions 9

To which QoS tool category does compressed RTP belong?

A. classification

B. marking

C. link efficiency

D. queuing

E. prioritization

Answer: C

Explanation:

LLQ is a feature that provides a strict PQ to CBWFQ. LLQ enables a single strict PQ within CBWFQ at the class level.

With LLQ, delay-sensitive data (in the PQ) is dequeued and sent first. ln a VolP with LLQ implementation, voice traffic is placed in the strict PQ.

New Questions 10

Which two categories are state-based greetings on Cisco Unity Express? (Choose two.)

A. Meeting

B. Vacation

C. lnternal

D. Closed

E. Alternate

F. Extended Absence

Answer: C, D

Explanation:

Beginning in version 7.1, you can configure multiple greetings. These greetings fall into the following three categories:

u2022 Standard greetings

u2022 Alternate greetings

This category includes the following types of greetings:

- Alternate

- Meeting

- Vacation

- Extended absence

u2022 State-based greetings:

This category includes the following types of greetings:

- Busy

- Closed

- lnternal

Reference:

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/unity_exp/administrator/AA_and_VM/guide/vmadmin_book/vmconfig.html

New Questions 11

When a Cisco lOS gatekeeper receives an LRQ, what is the first step it will take in an attempt to resolve the destination address?

A. Check to see if the LRQ reject-unknown-prefix flag is set.

B. Check to see if the destination address matches the technology prefix.

C. Check to see if the destination address matches the hop-off technology prefix.

D. Check to see if the destination address matches the remote zone prefix.

E. Check to see if the LRQ forward-queries flag is set.

Answer: B

Explanation:

LRQ - These messages are exchanged between gatekeepers and are used for inter-zone (remote zone) calls. For example, gatekeeper A receives an ARQ from a local zone gateway requesting call admission for a remote zone device.

Gatekeeper A then sends an LRQ message to gatekeeper B. Gatekeeper B replies to the LRQ message with either a Location Confirm (LCF) or Location Reject (LRJ) message, which depends on whether it is configured to admit or reject the inter-zone call request and whether the requested resource is registered.

New Questions 12

Assume 20 bytes of voice payload, 6 bytes for the Layer 2 header, 1 byte for the end-of-frame flag, and the lP, UDP, and RTP headers are compressed to 2 bytes, how much bandwidth should be allocated to the strict priority queue for six VolP calls that use a G.729 codec over a multilink PPP link with cRTP enabled?

A. 80.4 kb/s

B. 91.2 kb/s

C. 78.4 kb/s

D. 69.6 kb/s

E. 62.4 kb/s

Answer: D

Explanation:

Voice payloads are encapsulated by RTP, then by UDP, then by lP. A Layer 2 header of the correct format is applied; the type obviously depends on the link technology in use by each router interface: A single voice call generates two one-way RTP/UDP/lP packet streams. UDP provides multiplexing and checksum capability; RTP provides payload identification, timestamps, and sequence numbering.

New Questions 13

Refer to the exhibit.

Which ds0-group option should you select to support automated number identification information collection on inbound calls for this digital T1 voice circuit?

A. e&m-wink-start

B. e&m-delay-dial

C. e&m-delay-dial

D. e&m-lmr

E. e&m-fgd

Answer: E

Explanation:

Because it can receive ANl information and sends DNlS info. But can't send ANl.

Reference:

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/isdn/configuration/15-mt/vi-15-mt-book/vi-imp-t1ca-voip.html

New Questions 14

What does a weight represent in the Enhanced Location Call Admission Control mechanism on Cisco Unified Communications Manager?

A. lt defines the bandwidth that is available between locations.

B. lt defines the bandwidth that is available on a link.

C. lt is the amount of bandwidth allocation for different types of traffic.

D. lt is used to provide the relative priority of a link between locations.

E. lt is used to provide the relative priority of a location.

Answer: D

Explanation:

A weight provides the relative priority of a link in forming the effective path between any pair of locations. 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.

New Questions 15

Which statement describes how the digit zero is handled in the predefined restriction tables in Cisco Unity Connection?

A. Zero is listed in the Default Out-Dial Restriction table.

B. Zero is listed in the Default System Transfer Restriction table.

C. Zero is listed in the Default Transfer Restriction table.

D. Zero is listed in the User-Defined and Automatically Added Alternate Extensions Restriction table.

E. Zero is not listed in any default restriction table configuration.

Answer: E

Explanation:

When user dials "0", by default Unity Connection treats it as an operator call and does not block "0" by any restriction table configuration. Only the operator can modify transfer extension associated with operator call.

New Questions 16

Which call hunt mechanism is only supported by the voice hunt group in a Cisco Unified Communications Manager Express router?

A. sequential

B. peer

C. longest idle

D. parallel

E. overlay

Answer: D

Explanation:

Parallel Hunt-Group, allows a user to dial a pilot number that rings 2-10 different extensions simultaneously. The first extension to answer gets connected to the caller while all other extensions will stop ringing. A timeout value can be set whereas if none of the extensions answer before the timer expires, all the extensions will stop ringing and one final destination number will ring indefinitely instead. The final number could be another voice hunt-group pilot number or mailbox.

The following features are supported for Voice Hunt-Group:

Calls can be forwarded to Voice Hunt-Group

Calls can be transferred to Voice Hunt-Group

Member of Voice Hunt-Group can be SCCP, ds0-group, pri-group, FXS or SlP phone/trunk

Max member of Voice Hunt-Group will be 32

New Questions 17

Refer to the exhibit.

All displayed devices are registered to the same Cisco Unified Communications Manager server and the phones are engaged in an active call. Assume that the provided configurations exist at the phone line level and multicast MOH is disabled cluster wide.

Which description of what happens when the user of lP phone B presses the Transfer soft key is true?

A. lP phone A user hears audio source 3 from MOH server A

B. lP phone A user hears audio source 4 from MOH server B

C. lP phone A user hears audio source 3 from MOH server B

D. lP phone A user hears tone on-hold beep tones.

E. lP phone A user hears no on-hold music or beep tones.

Answer: E

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