多项选择题
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.
相关考题
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多项选择题
Whichtwostatementsaretrueaboutanalogtodigitalconversionofvoicesignalsforuseindigitaltelephonynetworks？（）
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. -
多项选择题
InterfacecongestioniscausingdropsinvoicepacketsandTCPpackets.ThedropsresultinjerkyspeechqualityandslowerFTPtrafficflows.WhichtwotechnologieswouldproactivelyaddresstheTCPtransferrateandthevoiceproblems？（）
A. CBWFQ
B. LLQ
C. traffic shaping
D. WRED -
多项选择题
Whichthreemethodswouldhelppreventcriticalnetwork-trafficpacketlossonhighspeedserialinterfaces？（）
A. policy routing
B. increase link capacity
C. WRED
D. CBWFQ
E. LFI
F. WFQ
