通过VPN技术，企业可以在远程用户、分支部门、合作伙伴之间建立一条安全通道，实现VPN提供的多种安全服务。VPN不能提供的安全服务是（ ）。
- A.保密性服务
- B.网络隔离服务
- C.完整性服务
- D.认证服务
正确答案及解析
正确答案
解析
参见《信息安全工程师5天修炼》VPN部分。虚拟专用网络（Virtual Private Network，VPN）是一种在互联网上建立专用网络的技术。通过VPN技术，企业可以在远程用户、分支部门、合作伙伴之间建立一条安全通道，实现VPN提供的多种安全服务。VPN提供的主要安全服务有保密性服务、完整性服务、认证服务。
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