When analog signals are digitized using the G.711 codec, voi

题目
多选题
When analog signals are digitized using the G.711 codec, voice samples are encapsulated into protocol data units (PDUs) involving which three headers? ()
A

IP

B

TCP

C

RTP

D

UDP

E

H323

F

CRTP

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相似问题和答案

第1题:

You are the Cisco Network Designer in Cisco.com. Your company is using the G.711 codec with 802.11a access point radios. This can support a maximum of how many phones per access point?()

A.5

B.10

C.14

D.20


参考答案:C

第2题:

When analog signals are digitized using the G.711 codec, voice samples are encapsulated into protocol data units (PDUs) involving which three headers? ()

  • A、IP
  • B、TCP
  • C、RTP
  • D、UDP
  • E、H323
  • F、CRTP

正确答案:A,C,D

第3题:

What is the maximum attainable bandwidth using an analog data modem?()

A.28.8kbps

B.56kbps

C.128kbps

D.1544kbps


参考答案:B

第4题:

What is the maximum attainable bandwidth using an analog data modem?()

  • A、28.8kbps
  • B、56kbps
  • C、128kbps
  • D、1544kbps

正确答案:B

第5题:

Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks?()

  • A、The three required steps in the analog to digital conversion are sampling,encoding,and compression.
  • B、The three required steps in the analog to digital conversion are sampling,quantization,and compression.
  • C、The three required steps in the analog to digital conversion are sampling,quantization,and encoding.
  • D、The output of the sampling process is a pulse code modulation (PCM) signal.
  • E、The output of the sampling process is a pulse amplitude modulation (PAM) signal.

正确答案:C,E

第6题:

For thousands of years people communicated ___ little more than words, stone tablets, and smoke signals.

A.to use

B.used

C.use

D.using

答案:D
解析:
本题考查非谓语。题目意为“几千年来,人们使用文字、石碑和烟雾信号进行交流。”空格处表示方式、方法且people与use在逻辑关系上是主动的,因此使用动词ing形式。选项A动词不定式可表示目的,选项B动词被动式,选项C动词原形,语法错误。故选D。
  

第7题:

You are the Cisco Network Designer in Cisco.com. Your company is using the G.711 codec with 802.11a access point radios. This can support a maximum of how many phones per access point?()

  • A、5
  • B、10
  • C、14
  • D、20

正确答案:C

第8题:

When comparing analog display inputs to digital display inputs, which of the following is anadvantage that digital has over analog?()

A. Allows for higher brightness

B. More crosstalk

C. Sustains higher resolutions

D. Supports widescreen resolutions


参考答案:C

第9题:

Which three functions are associated with a Cisco Unified CallManager? ()

  • A、 connects traditional telephony devices to voice over IP infrastructure
  • B、 converts analog signals to digital format
  • C、 performs voice compression
  • D、 performs call processing
  • E、 performs dial plan administration
  • F、 performs signaling and device control

正确答案:D,E,F

第10题:

When a router converts analog signals to digital signals, what three steps are always included in the process?()

  • A、involution
  • B、encoding
  • C、sampling
  • D、quantization
  • E、compression
  • F、companding

正确答案:B,C,D

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