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QUESTION 44
How many VoIP G.729 calls can be made simultaneously over a 128-kb/s Frame Relay circuit (Layer 3) if 50 percent of the circuit is dedicated to voice and 50 percent is dedicated to data?
A. 1
B. 2
C. 3
D. 4
E. 5
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 45
In a voice gateway, the configured codec complexity of the DSPs on a voice card can be changed. What is the impact on the DSPs if high codec complexity is configured?
A. The codec complexity affects call density, which is the number of calls that are reconciled on the DSPs. This results in lower call density when high complexity is configured.
B. With higher codec complexity, more calls can be processed.
C. Lower codec complexity supports the fewest number of voice channels, provided that the lower complexity is compatible with the particular codecs that are in use.
D. The DSP will process codecs that support high complexity transparently and shift to flex mode for those codecs that are not high complexity
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 46
Refer to the exhibit. A new Cisco Unified Communications Manager Express system has been deployed and the technician is trying to add the first new IP phone to the system. The phone powers up, but it does not register with the system. The technician has verified that the phone is getting the proper VLAN information from Cisco Discovery Protocol. The phone is also getting the correct IP address and TFTP server address from DHCP. The phone has been assigned to an ephone and the correct MAC address is configured. With the information provided, which two of the following does the administrator need to verify to resolve this situation? (Choose two.)
A. Verify that theip helper-address is correctly configured.
B. Verify that telephony-service has been configured.
C. Verify that theephone has a button assigned.
D. Verify that thetftp-server path has been configured.
E. Verify that the Cisco Unified Communications Manager Express service is running.
F. Verify that the correct phone type files are in thetftp-server path
Correct Answer: DF Section: (none) Explanation
Explanation/Reference:
QUESTION 47
How does Packet Loss Concealment improve voice quality?
A. Cisco Packet Loss Concealment technology decreases the voice sampling rate to 10 ms of the voice payload to smooth gaps in the voice stream.
B. Packet Loss Concealment intelligently analyzes missing packets and generates a reasonable replacement packet to improve the voice quality
C. Packet Loss Concealment will buffer 20 to 50 ms of a voice stream to minimize lost or out-of-order voice packets.
D. Packet Loss Concealment will compensate for packet loss rates between 1 and 5 percent by generating a reasonable replacement packet to improve the voice quality.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 48
Which three methodologies are specific types of QoS used on a 512-kb/s point-to-point IP WAN link? (Choose three.)
A. header compression
B. FRF.12
C. LLQ
D. Multilink PPP
E. RSVP
Correct Answer: ACE Section: (none) Explanation
Explanation/Reference:
QUESTION 49 Select and Place: Correct Answer: Section: (none)
Explanation Explanation/Reference:
QUESTION 50
Which three of the following methods are used by a Cisco Unified Border Element to provide network hiding? (Choose three.)
A. back-to-back user agent, replacing all H.323-embedded IP addressing
B. IP network security boundary
C. media flow-through
D. RSVP
E. IP network privacy
F. intelligent IP address translation for call media and RTP flows
Correct Answer: BEF Section: (none) Explanation
Explanation/Reference:
QUESTION 51
Select and Place: Correct Answer: Section: (none)
Explanation
DSP delay, Packetization delay, Serialization delay & Dejitter Buffer delay are Fixed delay types. Queuing and Buffering delay & Network delay are Variable Delay types.
QUESTION 52
Refer to the exhibit. Consider an outgoing call that is being placed in all three scenarios that are shown in the exhibit. What is the result of the call, going down the table from top to bottom?
A. success,success,success
B. success, success, fail
C. success, fail, success
D. success, fail, fail
E. fail, success, success
F. fail, success, fail
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 53
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 10.1.30.1J24
G. default-router 10.1.30.1
Correct Answer: CEG Section: (none) Explanation
Explanation/Reference:
QUESTION 54
Refer to the exhibit. When an international call to 90114989531212001 is placed from extension 2001, which of the following statements is true?
A. The call will fail because no incoming COR list is applied.
B. The call will succeed because the incoming COR list is a superset of the outgoing COR list.
C. The call will fail because the incoming COR list is not a superset of the outgoing COR list.
D. The call will succeed because the incoming COR list has the highest priority, by default, when no incoming COR list is applied.
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 55
In which situation would the trust boundary be located at the access layer?
A. if the endpoints, both IP phones and PCs, are incapable of marking traffic properly
B. if PCs are switched through an IP phone and the IP phone traffic can be trusted to mark both traffic streams properly
C. if the access layer switch cannot trust or re-mark incoming traffic from endpoints properly
D. if there are endpoints that cannot be trusted and connect directly to the distribution layer
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 56
An access layer switch is configured to extend priority to an IP phone. Cisco Discovery Protocol is enabled on all ports. What are the three possible ways that an IP phone can be instructed to treat the Layer 2 CoS priority value of the attached PC? (Choose three.)
A. trusted IEEE 802.1Q
B. configured DSCP level
C. configuredCoS level
D. trusted
E. configured IEEE 802.1Q
F. untrusted
Correct Answer: ACD Section: (none) Explanation
Explanation/Reference:
QUESTION 57
Refer to the exhibit. When 5551234 is being matched with the outgoing dial peer that is shown in the exhibit, which of the following called numbers will be sent to the PSTN?
A. 5551234
B. 1234
C. 555
D. Null
E. 5
F. 51234
Correct Answer: F Section: (none) Explanation
Explanation/Reference:
QUESTION 58 Select and Place: Correct Answer: Section: (none)
Explanation
QUESTION 59
Select and Place: Correct Answer: Section: (none)
Explanation Explanation/Reference:
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