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问题 单项选择题

在下列条款中（）不是2000版“气瓶安全监察规程”中规定的。

A．气瓶的公称容积系列，应在相应的国家标准或行业标准中规定

B．气瓶的钢印标记是识别气瓶的依据

C．气瓶可以改装

D．气瓶实行固定充装单位充装制度，不得为任何其它单位和个人充装气瓶

答案

参考答案：C

单项选择题

(66) is used to ensure the confidentiality, integrity and authenticity of the two end points in the private network. (67) , an application-layer protocol, authenticates each peer in an IPsec transaction. IKE negotiates security policy, determining which algorithm may be used to set up the tunnel. It also handles the exchange of session keys used for that one transaction.
Networks that use (68) to secure data traffic can automatically authenticate devices by using (69) , which verify the identities of the two users who are sending information back and forth. IPsec can be ideal way to secure data in large networks that require secure connections among many devices.
Users deploying IPsec can (70) their network infrastructure without affecting the applications on individual computer. The protocol suite is available as a software-only upgrade to the network infrastructure. This alows security to be implemented without costly changes to each computer. Most important, IPsec allows interoperability among different network devices, PCs and other computing systems.

A．authenticity

B．IPSec

C．confidentiality

D．integrity
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