2. 计算机
  3. IPSec，also known as the Internet Protocol (71)________，defines the architecture for security services for IP network traffic.IP

IPSec，also known as the Internet Protocol (71)________，defines the architecture for security services for IP network traffic.IP

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问题 IPSec，also known as the Internet Protocol  (71)________，defines the architecture for security services for IP network traffic.IPSec describes the framework for providing security at the IP layer as well as the suite of protocols designed to provide that security,through  (72)________  and encryption of IP network packets．IPSec can be used to protect network data，for example，by setting up circuits using IPSec  (73)________，in which all data being sent between two endpoints is encrypted，as with a Virtual  (74)________ Network connection；for encrypting application layer data；and for providing security for routers sending routing data across the public internet．Internet traffic can also be secured from host to host without the use of IPSec，for example by encryption at the  (75)________ layer with HTTP Secure(HTTPS)________or at the transport layer with the Transport Layer Security(TLS)________protocol．
(75)
选项 A、network
B、transport
C、application
D、session
答案C
解析 IPSec，也称为Intemet协议安全，定义了IP网络流量安全服务的体系结构。IPSec描述了在IP层提供安全性的框架，以及通过IP网络数据包的身份验证和加密来提供安全性的协议套件。IPSec可用于保护网络数据，例如，通过使用IPSec隧道设置环路，在该环路中两个端点之间发送的所有数据都是加密的，就像使用虚拟专用网络连接一样。IPSec也可以用于加密应用层数据以及为通过公共互联网发送路由数据的路由器提供安全保障。不使用IPSec，也可以在主机之间保护Internet流量，例如在应用层使用HTTP安全协议(HTTPS)加密，或者在传输层使用传输层安全协议(TLS)加密。
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