IPv4也有一个针对移动的变种，依赖于三角路由——简单来说，老的网络连接充当数据包的中继，每当你移动数据包就暗中增加。

IPv4 also had a mobile variant, which relied on triangular routing-in simple terms, the old network acted as a relay for packets, which added latency every time you moved.

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确保服务的实现依赖于在边界路由器执行的数据包标记策略和在核心路由器执行的队列管理策略。

The Assured Services architecture relies on packet marking mechanism at the edge router, and queue management mechanism at the core router.

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