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Cisco 400-051 Dumps

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Questions & Answers for Cisco 400-051

Showing 1-15 of 432 Questions

Question #1 - Topic 1

What is the maximum number of call-processing subscribers in a standard deployment of a
Cisco Unified Communications Manager Session Management Edition cluster?

A. 3

B. 4

C. 5

D. 8

E. 16

Explanation:
There is no deployment difference between CUCM & CUCM session management Edition
cluster. The only difference is that CUCM SME is designed to support a large number of
trunk to trunk connections. Thus, 8 subscribers.

Question #2 - Topic 1

Which protocol does the Cisco Prime LAN Management Solution application use to
communicate with Cisco EnergyWise domain members?

A. UDP broadcast

B. Cisco Discovery Protocol

C. UDP unicast

D. TCP

E. multicast

Explanation:
Cisco Prime LMS 4.1 uses TCP port 43440.

Question #3 - Topic 1

Company ABC is planning to migrate from MCS-hosted Cisco Unified Communications
Manager applications to Cisco UC on UCS B-Series servers. Which statement about
installation media support is true for this migration?

A. The install log can be written to a USB flash drive that is attached to the UCS server.

B. The answer file that is generated by the Answer File Generator (platformConfig.xml) can be read from a USB flash drive to perform an unattended installation on the UCS server.

C. The Cisco Music on Hold USB audio sound card can be mapped to a virtual USB port on a VMware virtual machine on the UCS server.

D. The answer file that is generated by the Answer File Generator (platformConfig.xml) can be read from an FLP image that is mounted in a virtual floppy drive.

E. The Cisco Music on Hold USB audio sound card can be mapped to a virtual serial port on a VMware virtual machine on the UCS server.

Explanation:
Using the AFG will allow you to get this license mac before even touching the server. It is
provided after filling in the main form of the AFG but it can also be found by looking at the
last few lines of your platformconfig.xml file.
Once you have the xml files, you will need to map those to the floppy drive of the VM (no
usb support on the VM OVA). There are many ways to do this. I simply use a freeware
virtual floppy app that I drop the platformconfig.xml file on and then copy the*.flp image out
to the datastore. Ill end up with a directory on my datastore called AFG that has the host
named *.flp images that I will use during install. It also serves as archival of these files in
the event the server needs to be re-imaged. This is important because the license mac will
change if every parameter is not entered exactly as it was prior. If the license mac
changes, you will have to go through the process of requesting new license files to be
generated.
Reference: http://angryciscoguy.com/jello/cisco-answer-file-generator-to-the-rescue/

Question #4 - Topic 1

Which definition is included in a Cisco UC on UCS TRC?

A. storage arrays such as those from EMC or NetApp, if applicable

B. configuration of virtual-to-physical network interface mapping

C. step-by-step procedures for hardware BIOS, firmware, drivers, and RAID setup

D. server model and local components (CPU, RAM, adapters, local storage) at the part number level

E. configuration settings and patch recommendations for VMware software

Explanation:
What does a TRC definition include?
✑ Definition of server model and local components (CPU, RAM, adapters, local
storage) at the orderable part number level.
✑ Required RAID configuration (e.g. RAID5, RAID10, etc.) - including battery backup
cache or SuperCap - when the TRC uses DAS storage
✑ Guidance on hardware installation and basic setup (e.g. click here).
✑ Design, installation and configuration of external hardware is not included in TRC
definition, such as:
✑ Configuration settings, patch recommendations or step by step procedures for
VMware software are not included in TRC definition.
✑ Infrastructure solutions such as Vblock from Virtual Computing Environment may
also be leveraged for configuration details not included in the TRC definition.
Reference:
http://docwiki.cisco.com/wiki/UC_Virtualization_Supported_Hardware#UC_on_UCS_Teste
d_Reference_Configurations

Question #5 - Topic 1

In a Cisco EnergyWise domain, which two terms describe a Cisco IP phone? (Choose two.)
A. endpoint
B. domain member
C. child domain member
D. EnergyWise agent
E. Cisco power distribution unit

A,C

//www.cisco.com/en/US/docs/switches/lan/energywise/phase2_5/ios/configuration/guid
e/one_ent.html

Question #6 - Topic 1

Which two statements about the Cisco UC on UCS specs-based virtualization support
model are true? (Choose two.)

A. It has a configuration-based approach.

B. It has a rule-based approach.

C. It has less hardware flexibility compared to the third-party server specs-based support model.

D. It has less hardware flexibility compared to the UC on UCS TRC support model.

E. VMware vCenter is optional with this support model.

Reference:
http://docwiki.cisco.com/wiki/UC_Virtualization_Supported_Hardware#UC_on_UCS_Teste
d_Reference_Configurations

Question #7 - Topic 1

Refer to the exhibit.

Assuming that the administrator has never performed any manual custom uploads, which
two file types can be found when you choose Software Upgrades, followed by TFTP File
Management on the Cisco Unified Operating System Administration web page for Cisco
Unified Communications Manager? (Choose two.)

A. IP phone configuration files

B. announcement audio files

C. ringer files

D. IP phone license files

E. sample music-on-hold audio files

F. softkey template files

Explanation:
The two file types that we get are Announcement Audio Files and Ringer Files.

Question #8 - Topic 1

Which two statements about the Peer Firmware Sharing option for IP phone firmware
distribution are true? (Choose two.)

A. This option uses a parent-child hierarchy in which a firmware image is downloaded by a parent phone to up to three directly associated child phones.

B. This option must be enabled on Cisco Unified Communications Manager service parameters for Cisco TFTP.

C. This option mandates that the parent phone and child phones be identical, selected phone models.

D. This option allows firmware transfers between phones in different subnets, as long as the round-trip delay is less than 5 milliseconds.

E. This option uses a parent-child hierarchy that must be manually defined by the Cisco Unified Communications Manager administrator.

F. This option allows falling back to the TFTP server in the Cisco Unified Communications Manager cluster.

Explanation:
Peer Firmware Sharing works by setting up a parent-child hierarchy of the phones in which
a firmware image is downloaded by the parent phone to a child phone. The advantage of
using Peer Firmware Sharing is that instead of all phones individually retrieving a software
image, they pass the image along from one phone to another phone on the same subnet.
Advantage of PFS:
✑ Hierarchy is automatic
✑ One download per phone model on a subnet
✑ Uses TCP
✑ Fails back to TFTP
✑ Speeds up LAN upgrades
✑ Reduces TFTP CPU load during upgrade

Question #9 - Topic 1

Which statement describes a disadvantage of using the Cisco TFTP service to serve IP
phone load files?

A. The Cisco TFTP services can run on only one Cisco Unified Communications Manager server in a cluster.

B. Because TFTP operates on top of UDP, there is a high risk of corrupted load file delivery at the completion of the TFTP process due to undetected data loss in the network.

C. If a response is not received in the timeout period, the TFTP server will not resend the data packet.

D. Packet loss can significantly increase the TFTP session completion time.

E. Because TFTP operates with an adaptive timeout period, the time to complete the file transfer is unpredictable.

Explanation:
Voice traffic cannot recapture lost packets. Rather than retransmitting a lost network
connection, the phone resets and attempts to reconnect its network connection.
Reference:
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/6921_6941_6961/7_1_2/english/
admin/guide/6921trb.html#wp1031181

Question #10 - Topic 1

Which capability is supported by Cisco Discovery Protocol but not by LLDP-MED?

A. LAN speed and duplex discovery

B. Network policy discovery

C. Location identification discovery

D. Power discovery

E. Trust extension

Explanation:
Cisco Discovery Protocol provides an additional capability not found in LLDP-MED that
allows the switch to extend trust to the phone. In this case, the phone is now trusted to
mark the packets received on the PC port accordingly. This feature can be used to off-load
the switch because now it does not need to police the information being received from the
phone.

Question #11 - Topic 1

Which statement about Cisco EnergyWise domain member neighbor formation is true?

A. Cisco EnergyWise supports static neighbors, but the neighbor relationship is only possible if a noncontiguous domain member and a contiguous domain member have a static neighbor entry pointing to each other.

B. Cisco EnergyWise static neighbors can be formed even if domain members are not physically contiguous.

C. Static neighbors can be manually defined on Cisco EnergyWise domain members, but TCP protocols must be used.

D. Static neighbors can be manually defined on Cisco EnergyWise domain members, but they have a lower priority compared to the autodiscovered members.

E. Static neighbors can be manually defined on Cisco EnergyWise domain members and the TCP or UDP protocol can be used.

Reference:
http://www.cisco.com/en/US/docs/solutions/Enterprise/Borderless_Networks/Energy_Mana
gement/energywisedg.html?referring_site=smartnavRD#wp554384

Question #12 - Topic 1

Refer to the exhibit.

Assuming that the administrator has never performed any manual custom uploads, which
two file types can be found when you choose Software Upgrades, followed by TFTP File
Management on the Cisco Unified Operating System Administration web page? (Choose
two.)

A. IP phone configuration files

B. sample music-on-hold audio files

C. Identity Trust List files

D. IP phone license files

E. Mobile Voice Access audio files

F. softkey template files

Explanation:
We get option for Identity Trust list Files and Mobile Voice Access audio files.

Question #13 - Topic 1

Which definition is included in a Cisco UC on UCS TRC?

A. required RAID configuration, when the TRC uses direct-attached storage

B. configuration of virtual-to-physical network interface mapping

C. step-by-step procedures for hardware BIOS, firmware, drivers, and RAID setup

D. configuration settings and patch recommendations for VMware software

E. server model and local components (CPU, RAM, adapters, local storage) by name only; part numbers are not included because they change over time

Explanation:
Definition of server model and local components (CPU, RAM, adapters, local storage) at
the orderable part number level.
✑ Required RAID configuration (e.g. RAID5, RAID10, etc.) - including battery backup
cache or SuperCap - when the TRC uses DAS storage
✑ Guidance on hardware installation and basic setup.
✑ Design, installation and configuration of external hardware is not included in TRC
definition, such as:
✑ Configuration settings, patch recommendations or step by step procedures for
VMware software are not included in TRC definition.
✑ Infrastructure solutions such as Vblock from Virtual Computing Environment may
also be leveraged for configuration details not included in the TRC definition.

Question #14 - Topic 1

Which four attributes are needed to determine the time to complete a TFTP file transfer
process? (Choose four.)

A. file size

B. file type

C. network interface type

D. round-trip time

E. packet loss percentage

F. response timeout

G. network throughput

Explanation:
Four attributes that are needed to determine the time to complete TFTP file transfer
process is:
✑ File Size
✑ Round-trip time
✑ Packet loss percentage
✑ Response timeout
Reference:
http://www.cisco.com/en/US/prod/collateral/voicesw/ps6882/ps6884/white_paper_c11-
583891_ps10451_Products_White_Paper.html

Question #15 - Topic 1

Which capability is support by LLDP-MED but not by Cisco Discovery Protocol?

A. LAN speed discovery

B. network policy discovery

C. location identification discovery

D. power discovery

E. trust extension

Explanation:
LLDP-MED supports both LAN speed and duplex discovery. Cisco Discovery Protocol
supports duplex discovery only, but this limited support is not seen as a problem because if
there is a speed mismatch, LLDP-MED and Cisco Discovery Protocol cannot be
exchanged and thus cannot be used to detect the mismatch.

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