不定项选择题 8.  Which encapsulation mode, when deployed in tunnel mode, provides confidentiality, authenticity, integrity, and anti-replay by encapsulating and protecting the entire original IP packet? 在隧道模式下,哪种封装模式通过封装整个IP包以提供保密性、真实性、完整性与抗重放服务?
【正确答案】 D
【答案解析】