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单选题
Voice activity detection （VAD） suppresses the transmission of silence patterns. On average， and assuming that a link carries at least 24 calls， what percentage of total bandwidth could VAD save？（）
A
5
B
15
C
25
D
35
E
45
F
55
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单选题Voice activity detection （VAD） suppresses the transmission of silence patterns. On average， and assuming that a link carries at least 24 calls， what percentage of total bandwidth could VAD save？（）A
5B
15C
25D
35E
45F
55
考题
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Eliminates the need for physical cabling in a TCP/IP networkC
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Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network
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单选题How are messages displayed when you use the SRW.MESSAGE packaged procedure? （）A
Dialogue box that implicitly determines report execution. B
Message line that implicitly determines report execution. C
Message line that suppresses the default oracle message. D
Dialogue box that does not terminate report execution. E
Dialogue box that suppresses the default oracle message.
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Use DHCP rogue detection on the WDS server.D
Use an Auto-Add policy on the WDS server.
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多选题Which of the following statements regarding ISDN are correct?（）AEach ISDN B channel has transmission speeds of up to 64 kbps.BThe ISDN B channel can carry video, voice or data.CThe ISDN B channel transmission rate varies depending on the service used.DThe ISDN D channel transmits control information.EThe ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.
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多选题Which three are benefits of U-APSD?（）Asynchronization of the transmission and reception of voice framesBbandwidth reservationCoptimized power-save mode periodsDincreased call capacityEpriority bandwidth and polling
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单选题The second paragraph is focused on _____.A
the principles of past lie-detection machinesB
why past lie-detection machines did not workC
why it is necessary to develop new lie-detection machinesD
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单选题What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A
Call Management Link AgentB
Traffic policingC
Call Admission ControlD
QoS Link Congestion ManagementE
Oversubscription Link Detection
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