移动IP是支持IP网络移动性的标准，当移动主机(节点)在不同的ip子网之间移动时，它通过隐藏ip地址的变换提供移动时无缝的切换。
Mobile IP is now the standard for supporting mobility in IP networks. It provides seamless mobility by hiding the change of IPaddress when a mobile host moves between IP subnets.
移动IP技术充分利用了IP协议对移动性的内在支持，提供了一种良好的移动网络解决方案。
Mobile IP technology, take full advantage of the IP protocol inherent support for mobility, it provides a good mobile network solution.
它提供用户对不同业务提供不同网络的自由接入，并支持通过移动性实现用户对业务使用的一致性和统一性。
Furthermore, it allows users to connect with different networks freely according to different operations, and provides consistency and unity for users through its mobile characteristics.
MM子层的主要功能是来支持用户终端的移动性，例如告知网络侧关于用户的位置并且保证用户身份的私密性。
The main function of the Mobility Management sublayer is to support the mobility of user terminals, such as informing the network of its present location and providing user identity confidentiality.
MM子层的主要功能是来支持用户终端的移动性，例如告知网络侧关于用户的位置并且保证用户身份的私密性。
The main function of the Mobility Management sublayer is to support the mobility of user terminals, such as informing the network of its present location and providing user identity confidentiality.
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