QUESTION 21
Voice packets are arriving at a destination with a variance of between 20 and 50 milliseconds. If the jitter buffer has a capacity of 30 milliseconds, what is the impact on the audio at the receivers IP phone?Voice packets are arriving at a destination with a variance of between 20 and 50 milliseconds. If the jitter buffer has a capacity of 30 milliseconds, what is the impact on the audio at the receivers IP phone?
A.The jitter buffer will replay the previous voice packets to replace those packets that exceed 30 milliseconds to avoid speech gaps.
B.There will be no impact the audio stream because the audio packets are arriving in the jitter buffer window.
C.The DSP will automatically increase the jitter buffer size after sampling the range of incoming voice packets to accommodate the wider range in variation of voice packet arrival times to avoid voice gaps.
D.The IP phone will negotiate in mid-call a lower bandwidth codec to reduce the delay in the arrival of voice packets to avoid voice gaps.
Answer: B
QUESTION 22
When deploying an 802.3af switch what is the default number of Watts consumed by each port if 802.3af compliant devices are attached to the switch?
A.4 Watts
B.6.3 Watts
C.7 Watts
D.15.4 Watts
E.22.3 Watts
Answer: D
QUESTION 23
When configuring AutoQoS VoIP on a Cisco Catalyst switch how is the configuration performed?
A.The auto qos voip command is applied to each interface.
B.The auto qos voip command is applied globally in the switch.
C.Each interface will need either the auto qos voip cisco-phone or auto qos voip trust on each interface depending on the upstream device.
D.Each interface will need either the auto qos voip trust cisco-phone or auto qos voip trust trust on each interface depending on the upstream device.
Answer: C
QUESTION 24
Assuming no cRTP or header compression. 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
Answer: B
QUESTION 25
How are firmware images implemented and which file type describes the contents of the firmware image?
A.Firmware images are implanted as firmware groups that are described by a file that has a .cnf suffix.
B.Firmware images are implemented as individual files that are described by a file that has a .loads suffix.
C.Firmware images are implemented as a file loader group and are described by a file that ends with a .sbn suffix.
D.Firmware images are implemented as file bundles that are described by a file that ends with a .loads suffix.
Answer: D
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