利用______可以很方便地实现虚拟局域网。

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(85)

An Intranet is (71) the application of Internet technology within an internal or closed user group．Internets are company and not do not have a (72) connection to the Internet．Usedproperly an Internet is highly effective corporate tool，capable of regularly (73) information toempower the workforce with the information needed to perform. their roles．Used in this Way，Internet represent a step towards the (74) office．

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在网络管理系统中，通常采用(52)模型。在网络管理的四要素中，(53)用于记录网络甲管理对象的信息；(54)用于在管理系统与管理对象之间传递操作命令。

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