They are both considered tunneling protocols –because they create a "virtual tunnel" by applying much needed encryption.
他们都认为隧道协议，因为他们创建一个“虚拟隧道”运用急需的加密技术。
Describe the technological requirements for running IPv6 in conjunction with IPv4 (including: protocols, dual stack, tunneling, etc).
描述在与IPv 4网络共存情况下实施IPv6的技术要求(包括协议放式，双栈方式，隧道方式)。
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