Internet Protocol (IP) provides a host-to-host packet — or datagram — delivery service.
网际协议(IP)提供“主机对主机”包(或数据报)传递服务。
UDP packet or user datagram: UDP is an unreliable, connectionless protocol.
UD p包或用户数据报：udp是不可靠、无连接的协议。
Plain IP packet, or IP datagram: IP packets are used to encapsulate any of the following protocols.
普通IP包或IP数据报：IP包可用来封装以下任何协议。
Notice that both datagram (packet) and stream connections are supported.
注意同时提供了对数据包(packet)和流连接的支持。
Transport Layer protocols, such as the Transmission Control Protocol (TCP), the User Datagram Protocol (UDP), specify a source and destination port number in their packet headers.
传输层协议，诸如传输控制协议（TCP），用户数据报协议（UDP）， 会在它们的头部指定一个资源和目的地的端口号。
Lack of context or state information makes it impossible to use packet-filters for datagram-based protocols such as File Transfer protocol.
缺乏上下文或国家信息使之不能把包过滤用于数据包为基础的协议，如文件传送协议。
Lack of context or state information makes it impossible to use packet - filters for datagram-based protocols such as File Transfer protocol.
缺乏上下文或国家信息使之不能把包过滤用于数据包为基础的协议，如文件传送协议。
The software of packet-filtering, which is based on the addresses of datagram, is realized after a discussion on the advantages and disadvantages of packet-filtering.
本文讨论了包过滤的优缺点，并实现了基于报文地址的包过滤功能。
The software of packet-filtering, which is based on the addresses of datagram, is realized after a discussion on the advantages and disadvantages of packet-filtering.
本文讨论了包过滤的优缺点，并实现了基于报文地址的包过滤功能。
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