Network　managers　have　long(140)practical　voice-over-IP(VOIP)solutions.　VOIP(141)ease　network　management　and　decreases　costs　by　c

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问题 Network　managers　have　long(140)practical　voice-over-IP(VOIP)solutions.　VOIP(141)ease　network　management　and　decreases　costs　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(142)tremendous　amounts　of(143)in　long　distance　phone　bills,　provided　that　solution　delivers　POTS-like　voice(144)over　the　Internet.

选项 A、frequency
B、length
C、quality
D、quantity

答案C

解析网络管理员一直盼望着实用的IP话音业务(VOIP)解决方案。VOIP通过将公司的电话和数据基础设施集成于同一网络，简化了网络管理，降低了成本。如果VOIP解决方案用于拥有远程分支机构的公司总部，那么通过Internet提供类似POTS的声音质量，可节省大量的长途话费。

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