Probabilistic packet marking (PPM) is a practical and effective method for IP traceback of denial-of-service(DoS) attack.

随机数据包标记（PPM）是对拒绝服务攻击进行IP回溯的一种实用而有效的方法。

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

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。

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Probabilistic Packet Marking (PPM) is an efficient and practical scheme.

概率包标记(PPM)是一种比较有效且实用的解决方法。

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They looked down at the solitary flower bed, at the bright-colored seed packets marking the empty rows, each packet pierced with a stick.

NEWYORKER: The Woman of the House