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Cisco 642-437 Exam Syllabus Topics:

SectionObjectives
Signaling and Call Control- Dial plans and call routing
- Gateways and gatekeepers
- SIP, H.323, and MGCP protocols
Call Admission Control and Performance- Call admission control mechanisms
- Voice network performance considerations
Troubleshooting and Operations- Common VoIP deployment issues
- Voice and QoS troubleshooting methodologies
Quality of Service (QoS)- Traffic classification and marking
- Congestion management and avoidance
- QoS models and mechanisms
- Queuing techniques and bandwidth management
VoIP Fundamentals- Voice over IP architecture and components
- Voice codecs and compression techniques
- Voice traffic signaling basics

Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:

1. Which four Cisco IOS commands are required to configure a DHCP server on a voice gateway to support a voice subnet so that both IP addresses and the IP address of the TFTP server are provided? The voice subnet has an address of 10.1.130.0/24, the default gateway is 10.1.130.1/24, and the TFTP server is located at 10.1.5.2. (Choose four.)

A) option 150 10.1.5.2
B) subnet 10.1.130.1/24
C) default-router 10.1.130.1
D) default-gw 10.1.130.1
E) dhcp pool voice
F) ip dhcp pool voice
G) network 10.1.130.0 255.255.255.0
H) option 150 ip 10.1.5.2


2. When Cisco Unified Communications Manager Express is used, which type of files are used to enable phone displays and operations?

A) Unified Communications Manager Express TSP archive files
B) Unified Communications Manager Express basic files
C) phone firmware files
D) phone GUI files


3. Digital signal processors offload media processing functions from voice processing equipment. What is the function of the dsp services dspfarm command that is issued under the voice-card configuration mode?

A) Enables profile failed due to insufficient transcoding resources.
B) Provides resources for Flex-DSPRM status UP.
C) Takes the DSP resources that are not being used for the voice part and assigns them to a farm.
D) Permits the codec rate to be attempted for SCCP-controlled connections.


4. What are two characteristics of a Cisco Unified Border Element? (Choose two.)

A) It can be an FXS port.
B) It can be an IP phone in the network.
C) It facilitates easy and cost-effective connectivity between independent VoIP service provider networks.
D) It is referred to in the industry as a "session border controller."


5. In the destination patterns, which wildcard symbol indicates a single-digit placeholder?

A) ()
B) +
C) %
D) . (period)


Solutions:

Question # 1
Answer: C,F,G,H
Question # 2
Answer: C
Question # 3
Answer: C
Question # 4
Answer: C,D
Question # 5
Answer: D

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