Network managers have long awaited practical voice-over-IP(VOIP)solutions. VOIP promises(71)network management and decreases cos

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问题 Network managers have long awaited practical voice-over-IP(VOIP)solutions. VOIP promises(71)network management and decreases costs by(72)a company’s telephony and data infrastructures into one network. And a VOIP solution implemented at a company’ s head -quarters with far -reaching branch offices can(73)tremendous amounts of(74)in long distance phone bills, provided that solution delivers POTS -like voice(75)over the Internet.

选项 A、get
B、put
C、save
D、waste

答案C

解析
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