642-437 Sample Question: 9

Question: 9 

Which three Cisco IOS commands are required to configure a voice gateway as a DHCP server to support a data subnet with the IP address of 10.1.30.0/24 and a default gateway of 10.1.30.1/24? (Choose three.)

A. ip dhcp pool
B. subnet 10.1.30.1 255.255.255.0
C. ip dhcp pool data
D. network 10.1.30.1/24
E. network 10.1.30.0 255.255.255.0
F. default-gw 10.1.30.1/24
G. default-router 10.1.30.1

Answer: C, E, G

642-437 Sample Question: 8

Question: 8

Refer to the exhibit. An administrator is migrating a PBX telephony system to a VoIP solution using a fixed numbering plan. The extension numbers and PSTN DIDs cannot be changed. Which of the following methods can be used in order to reach the individual extensions at Site B when called via the PSTN?

A. The administrator can replace the last three digits of the DID with xxx to cover the individual extensions.

B. The administrator can replace the last three digits of the DID with xxx and use translation rules to map the individual extensions.

C. The administrator needs to implement an auto-attendant solution where individual extensions can be dialed.

D. The administrator needs to map the last four digits in the DID to the extension numbers using translation rules.

Answer: D

642-437 Sample Question: 7

Questions: 7

Which two functions are associated with a voice gateway? (Choose two.)

A. Switches voice channels between connected analog and digital voice circuits
B. Provides voice-messaging services to connected analog and digital voice circuits
C. Interconnects two logically separate VoIP networks
D. Negotiates endpoint capabilities
E. Controls opening and closing of logical channels that are used to carry media streams

Answer: A,E
Explanation:
The basic function of a gateway is to translate between different types of networks. In a VoIP environment, voice gateways are the interface between a VoIP network and the public switched telephone network (PSTN), a private branch exchange (PBX), or analog devices such as fax machines. In its simplest form, a voice gateway has an IP interface and a legacy telephone interface, and it handles the many tasks involved in translating between transmission formats and protocols. The gateway allows communication between the two networks by performing tasks such as Interfacing with the IP network and the PSTN or PBX, Supporting IP call control protocols, Performing call setup and teardown for calls between the VoIP and PSTN networks by terminating and reoriginating the call media and signaling, Providing supplementary services, such as call hold and transfer, Relaying dual tone multifrequency (DTMF) tones, Supporting analog fax and modems over the IP network.

Which dial plan component is responsible for choosing the appropriate path for a call?

642-437 Sample Question: 6

Question: 6

Which dial plan component is responsible for choosing the appropriate path for a call?

A. endpoint addressing
B. call route and path selection
C. call coverage and path selection
D. calling privileges

Answer: A

642-437 Sample Question: 5

Question 5:

Which calling privileges command can be used to assign a specific configuring class of
restriction list named "restrict" incoming on a dial peer?

A. COR list restrict inbound
B. corlist restrict
C. corlist incoming restrict
D. cor assign restrict

Answer: C

642-437 Sample Question : 4

QUESTION 4:

Which other protocol does the auto qos voip cisco-phone command require to operate between
the switch port and the IP phone?

A. RTP
B. Skinny Protocol
C. CDP
D. RTCP
E. VTP
F. DTP

Answer: C

642-437 Sample Question : 3

QUESTION 3:

What is the class selector PHB used for in the differentiated services model?

A. Best-effort service
B. Low-delay service
C. Bandwidth guarantee
D. Backward compatibility

Answer: D