According to this problem, in this paper, a new reliable multicast protocol is proposed which integrates packet-level FEC and rate-adaptive technology on the basis of unidirectional satellite link.

针对这一问题，在单向链路卫星组播结构基础上，融合分组级FEC和自适应速率技术，提出了一种新的可靠组播协议，经过理论分析可知，新的协议具有较好的差错控制和拥塞控制能力。

youdao

Authentication at the packet level allows users to be sure that the packet received came from a particular machine, and that its contents were not altered somewhere along the way.

包级别的认证让用户可以确保收到的包来自于特定的机器，并且它的内容在传输路径上没有被改变。

youdao

VU scripts monitor your application while you use it and track what network information is sent and received at the packet level.

VU scripts当你使用它在包的级别上跟踪什么样的网络信息被发送和接受时，检测你的应用。

youdao

The truly paranoid may elect to use the 2.4 kernels' Netfilter4 facility (adding stateful packet filtering) or a commercial application-level proxy gateway.

CNN: Analysis: Linux security

But given what Qwest and Level 3 are spending to build smaller packet-switched businesses, he might easily be forced to accelerate spending at the same time that his margins erode.

FORBES: Grand illusions