Network managers have long awaited practical voice-over-IP(VOIP)solutions. VOIP promises ease network management and decreases(66)by converging 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(67)tremendous amounts of money in long distance phone bills, provided that solution delivers POTS-like voice(68)over the Internet.

VOIP gateways are designed to convert voice from the(69)domain to the circuit switched domain. VOIP solutions use a digital signal processor(DSP)to process the voice data, preparing the voice sample for transmission by compressing voice and removing jitter. The VOIP equipment must comply with the(70)H.323 standard defined by the International Telecommunication Union, or ITU.

A．time

B．cash

C．costs

D．space

[单选题]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 h

[单选题]（ ）–How long have you __________ this book?–For three days.A．borrowedB．keptC．lentD．bought

[单选题]You have a class C network, and you need to design it for 5 usable subnets with each subnet handling a minimum of 18 hosts each. Which of the following network masks should you use?A．225.225.224.0.B．225.225.240.0.C．225.225.255.0.D．255.255.255.224E．22

[单选题]2． How long have you ___________？A． worn itB． dressed itC． put it onD． tried it on

[问答题]()How long have you collected your stamps?

[单选题]_______with you,I have a long way to go.A.ComparedB.ComparingC.To compareD.

[主观题]H．ow long have you been looking for a job?你为找工作花了多长时间？

[主观题]H．ow long have you been looking for a position?你花了多长时间寻找自己的位置？

[单选题]Network management system doesn't have which？（）A . billing&chargingB . All technologyC . multi vendor

[单选题]Jenny Fox evaluates managers who have a cross-sectional population standard