2013 Latest CCNA Voice 640-461 Real Exam Question 96-100


Which type of server is used to deliver the configuration to an IP phone?
D. Cisco Discovery Protocol
Correct Answer: A Section: IP Phone Explanation
Cisco TFTP
The Cisco TFTP service builds and serves files consistent with the trivial file transfer protocol, which is a simplified version of the File Transfer Protocol (FTP). Cisco TFTP builds configuration files and serves embedded component executables, ringer files, and device configuration files.
A configuration file contains a prioritized list of Cisco CallManagers for a device (telephones and gateways), the TCP port on which the device connects to those Cisco CallManagers, and an executable load identifier. Configuration files for Cisco IP Phone 7960 and 7940 models also contain URLs for the phone buttons: messages, directories, services, and information. Configuration files for gateways contain all their configuration information.
Configuration files may be in a .cnf format or a .cnf.xml format, depending on the device type and your TFTP service parameter settings. When you set the BuildCNFFlag service parameter to True, the TFTP server builds both .cnf.xml and .cnf format configuration files for devices. When you set the parameter to False, the TFTP server builds only .cnf.xml files for devices.
Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/3_1_2/ccmsys/a02tftp.html

An end user reports that they are unable to control their Cisco IP phone using Cisco Unified Personal Communicator and cannot make any calls. Which situation can cause this issue?
A. The Cisco Unified Personal Communicator is not registered in the Cisco Unified Presence server.
B. The LDAP integration is incorrect.
C. The Cisco Unified Personal Communicator is configured in desk-phone mode.
D. The Allow Control of Device from CTI checkbox in the device configuration on Cisco Unified Communications Manager is disabled.
E. The Allow Control of Device from CTI checkbox in the device configuration on the Cisco Unified Presence is disabled.
Correct Answer: D Section: IP Phone Explanation
Complete these steps in order to resolve this issue:
Go to User Management > End User in order to verify that the user logged in is a member of the Standard CTI Enabled group in CUCM.
Go to User Management > End User and verify the Device Association.
This verifies that the user device is associated with their CUCM user profile.
Go to Application > Cisco Unified Personal Communicator > User Settings in order to verify that the device is the Preferred CTI Device in CUPS.
Go to User Management > End User in order to verify that the CUCM user has a primary extension specified.
The DN of the device you are trying to control must be specified in that user’s Active Directory (AD) profile under Telephone Number.
With CUP 6.0 and CUPC 1.2, specify the TFTP server address of the CUCM under Cisco Unified Presence – Settings.
Ensure that the DNS server the PC uses can resolve the fully qualified name of the CUPS server.

To obtain CDR information, which application is used?
A. Cisco Unified Communications Manager Administration
B. Cisco Unified Serviceability
C. Cisco Unified Operating System Administration
D. Disaster Recovery System
E. Cisco Unified Communications Manager Call Detail Record Analysis and Reporting tool
F. Cisco Unified Reporting
Correct Answer: E Section: CUCM Explanation
Cisco Unified Serviceability supports CDR Analysis and Reporting (CAR) under the Tools menu. CAR generates reports for Quality of Service, traffic, and billing information. Call detail records (CDRs) detail the called number, the number that placed the call, the date and time that the call was started, the time that it connected, and the time that it ended. Call management records (CMRs, or diagnostic records) detail the jitter, lost packets, the amount of data sent and received during the call, and latency. CDR data comprises CDRs and CMRs collectively. A single call can result in the generation of several CDRs and CMRs. Cisco Unified Communications Manager records information regarding each call in CDRs and CMRs. CDRs and CMRs, known collectively as CDR data, serve as the basic information source for CAR.
Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/service/6_0_1/car/carovrvw.html#wp1101768

Which two protocols are used by Cisco Unified Presence? (Choose two.)
Correct Answer: AB Section: Unified Presence Explanation
The Skinny Call Control Protocol (SCCP, or short Skinny) is a proprietary network terminal control protocol.
PPPoX (PPP over X) designates a family of encapsulating communications protocols implementing Point-to-Point Protocol.
IMPP is not a protocol.

What are the two differences between the IntServe and DiffServ models of QoS? (Choose two.)
A. DiffServ provides absolute QoS guarantees.
B. IntServ is the default QoS mechanism for all routers, because applications signal the router with the QoS level they require.
C. DiffServ inherits the connection-oriented approach from telephony network design. Every individual communication must explicitly specify its traffic descriptor and requested resources to the network.
D. With IntServ, packet delivery is guaranteed. However, the use of IntServ can severely limit the scalability of a network.
E. DiffServ was designed to overcome the limitations of both the best-effort and IntServ models and can provide an “almost guaranteed” QoS.
Correct Answer: DE Section: QoS Explanation
Integrated Services
Cisco IOS Software supports two fundamental Quality of Service architectures: Differentiated Services (DiffServ) and Integrated Services (IntServ). In the DiffServ model a packet’s “class” can be marked directly in the packet, which contrasts with the IntServ model where a signaling protocol is required to tell the routers which flows of packets requires special QoS treatment. DiffServ achieves better QoS scalability, while IntServ provides a tighter QoS mechanism for real-time traffic. These approaches can be complimentary and are not mutually exclusive.
The IntServ architecture model (RFC 1633, June 1994) was motivated by the needs of real-time applications such as remote video, multimedia conferencing, visualization, and virtual reality. It provides a way to deliver the end-to-end Quality of Service (QoS) that real-time applications require by explicitly managing network resources to provide QoS to specific user packet streams (flows). It uses “resource reservation” and “admission control” mechanisms as key building blocks to establish and maintain QoS.
IntServ uses Resource Reservation Protocol (RSVP) to explicitly signal the QoS needs of an application’s traffic along the devices in the end-to-end path through the network. If every network device along the path can reserve the necessary bandwidth, the originating application can begin transmitting.
Besides end-to-end signaling, IntServ requires several functions on routers and switches along the path:
Admission Control: determine whether a new flow can be granted the requested QoS without impacting existing reservations
Classification: recognize packets that need particular levels of QoS Policing: take action, including possibly dropping packets, when traffic does not conform to its specified characteristics
Queuing and Scheduling: forward packets according to those QoS requests that have been granted
Link: http://www.cisco.com/en/US/products/ps6611/products_ios_protocol_group_home.html

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