这些信息包有头，即在每个包前面所附带的一些数据位，它们包含有关信息包的源、目的地和协议类型的信息。
These packets have headers, i.e. bits of data prefixed to every packet that contain information about the packet's source, destination, and protocol types.
大多数服务器协议是一个包，这个包的基础是第一个X位的描述头，它包含了完整包的长度等详细信息。
The most common server protocol is a packet based protocol where the first X bytes represent a header and the header contains details of the length of the complete packet.
包的尾部并不是这个文件元数据信息存储的唯一位置。
The directory at the end of the archive is not the only location where file meta information is stored in the archive.
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