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Which two statements are true about the digital audio in a V

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Which two statements are true about the digital audio in a VoIP network？ （）
A

Standard encoding techniques create an uncompressed digital data rate of 4000 bps.

B

Standard encoding techniques create an uncompressed digital data rate of 8000 bps.

C

Standard encoding techniques create an uncompressed digital data rate of 64，000 bps.

D

Voice quality is not a concern if compression is not used.

E

Two methods of quantization are linear and logarithmic.

F

Two methods of compression are u-law and a-law.

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相似问题和答案

第1题：

Which two statements regarding symmetric key encryption are true?() (Choose two.)

A. The same key is used for encryption and decryption.

B. It is commonly used to create digital certificate signatures.

C. It uses two keys: one for encryption and a different key for decryption.

D. An attacker can decrypt data if the attacker captures the key used for encryption.


参考答案：A, D

第2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3题：

Which two statements are true about pool－based source NAT? ()(Choose two.)

A. PAT is not supported.

B. PAT is enabled by default.

C. It supports the address-persistent configuration option.

D. It supports the junos-global configuration option.


参考答案：B, C

第4题：

Which two statements about the Cisco Nexus 1000V VSM are true?（）

  • A、It performs switching decisions and forwarding for the VEM
  • B、It can be run on a virtual machine
  • C、It can be used for remote VEM switching Iine cards

正确答案:B,C

第5题：

Which two statements are true about L2TP tunnels?（） (Choose two.)

  • A、Traffic is clear text
  • B、Traffic is encrypted 
  • C、They are initiated by the LNS
  • D、They are initiated by the LAC

正确答案:A,D

第6题：

Which two statements are true about precedence values in policy?() (Choose two.)

A. 1 is the default precedence.

B. A lower number is preferred.

C. A higher number is preferred.

D. 100 is the default precedence.


参考答案：B, D

第7题：

Which two statements about SCSI are true？ （）

  • A、 The bus is limited to 32 devices
  • B、 It is a full duplex serial standard
  • C、 It is a half-duplex serial standard
  • D、 It allows up to 320 MB/s of shared channel bandwidth

正确答案:C,D

第8题：

Which two statements are true about AH?() (Choose two.)

A. AH provides data integrity.

B. AH is identified by IP protocol 50.

C. AH is identified by IP protocol 51.

D. AH cannot work in conjunction with ESP


参考答案：A, C

第9题：

Which two statements are true about traffic shaping？（）

  • A、Out-of-profile packets are queued.
  • B、It causes TCP retransmits.
  • C、Marking/remarking is not supported.
  • D、It does not respond to BECN and ForeSight Messages.
  • E、It uses a single/two-bucket mechanism for metering.

正确答案:A,C

第10题：

Which two statements are true about the digital audio in a VoIP network？ （）

  • A、 Standard encoding techniques create an uncompressed digital data rate of 4000 bps.
  • B、 Standard encoding techniques create an uncompressed digital data rate of 8000 bps.
  • C、 Standard encoding techniques create an uncompressed digital data rate of 64，000 bps.
  • D、 Voice quality is not a concern if compression is not used.
  • E、 Two methods of quantization are linear and logarithmic.
  • F、 Two methods of compression are u-law and a-law.

正确答案:C,E

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