下述论述中不正确的是（）。

答案查看网，轻松搜题/搜资源

【单选题】【消耗次数：1】

下述论述中不正确的是（）。

① IPV6具有高效IP包头

② IPV6增强了安全性

③ IPV6地址采用64位

④ IPV6采用主机地址自动配置

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