该网络使用TCP/IP 协议发送离散的数据包来传输信息。
The internet sends information as discrete packets of data using a suite ofprotocols known as TCP/IP.
在客户端与服务器之间的通信和信息交换，以客户端对数据包进行格式化作为开始(如下所示)，并将其发送给服务器。
The contact and exchange of information between the client and the server begins with the client formatting a packet, as shown below, and sending it to the server.
您也会得到关于分片和数据包顺序的信息。
You will also get information about the fragmentation and packet sequence.
尽管这项技术在很多方面已经有了改进，但协议将信息进行分割成数据包，并帧听传输过程中错误的方法却是公认的。
It has been improved in many ways, but the way in which the protocol breaks information into packets and then checks for errors in their transmission is still recognisable.
即使在交换的网络中，通过对您所希望研究的主机运行数据包扫描工具，您就可以获得一些有价值的信息。
Even on switched networks, you can gain some valuable information by running the packet-scanning tool on the host you want to investigate.
可以使用AIX7中提供的各种跟踪工具来记录有关数据包的详细信息。
The tracing tools that are provided within AIX 7 are used to record detailed information about the packets.
可以使用AIX中提供的各种跟踪工具来记录有关数据包的详细信息。
The tracing tools that are provided within AIX are used to record detailed information about the packets.
以RX和TX开头的行很重要，它们提供关于发送和接收的数据包的信息。
The important rows are those beginning RX and TX, which show information about the packets sent and received.
例如，清单8显示的是一个打印所有数据包的IP地址信息的简单脚本。
For example, Listing 8 shows a simple script that prints out the IP address information for all of the packets.
此外，大部分信息也会经过二进制编码后再发送，从网络捕捉完全原始的数据包需要进行大量的操作才能捕捉您需要的数据。
In addition, much of this information is also sent encoded in binary format, and capturing pure raw packets off of the network requires a significant amount of work to pick out the data that you need.
安全产品经常提供很多的重要的分析价值，它们经常提供比跟踪/状态数据包更好的信息来理解站点上发生的事情。
The products often provide great analytics value because they are sometimes better than normal tracking/stats packages for understanding what's going on with your site.
解码网络传输最复杂的是网络数据包中信息的级别。
The primary complexity behind decoding network transmission is the levels of information that are provided within the network packets.
应用程序间的通信(甚至网络上计算机之间的通信)通常都使用消息(即一系列不同的信息数据包)完成。
Communication between applications, and even between computers on a network, is usually accomplished using messaging-a series of discrete packets of information.
互联网的早期创建者们发现，如果把数据信息分成许多较小的集合，即数据包，一个个单独发送，传送速度会大大提高。
The early creators of the Internet discovered that data and information could be sent more efficiently when broken into smaller chunks, sent separately, and reassembled.
它能输出非常详细的数据包信息，并且它们应该进行更紧密的观察。
The output from this is quite detailed for each packet and deserves some closer investigation.
处理来自tcpdump的另一个方法是将原始网络数据包数据保存到一个文件中，然后处理这个文件以便查找和解码出您想要的信息。
Another way to process the content from tcpdump is to save the raw network packet data to a file and then process the file to find and decode the information that you want.
在上面的示例中，已经切换到了详细模式，这将确保记录原始数据包的全部内容，而不仅仅是snoop在缺省情况下所提供的摘要信息。
In the above example, verbose mode has also been switched-this ensures that the full contents of the raw packets are recorded, instead of just the summary information that snoop provides by default.
通过snoop的输出，我们必须从原始网络数据包信息中提取每一个数据块。
As with the output from snoop, we have to extract each of the blocks of data from the raw network packet information.
MySQL协议会传到一个带有错误信息的特殊数据包类型。
The MySQL protocol returns a specific packet type with the error information.
根据问题的性质，有时候最好运行tcpdump一段时间，同时使用- w选项把数据包信息捕捉到文件中。
Depending on the nature of the problem, it is sometimes good practice to run a tcpdump for a period of time while capturing packet information to a file using the -w switch.
虽然运行诸如netstat之类的命令可以提供一些有用的信息，但有时您仍然需要深入到数据包级别上进行更进一步的分析。
While running commands such as netstat can provide useful information, sometimes you need to drill down more to the packet level.
虽然运行netstat等命令可以提供有用的信息，但有时您仍然需要深入到数据包作进一步分析。
While running commands (such as netstat) can provide useful information, sometimes you need to drill down more to the packet level.
所以，当你在互联网上发送一封电子邮件的时候，你邮件的全部信息是被分成许多数据包来发送的。
Those chunks are called packets.So when you send an email across the Internet, your full email message is broken down into packets.
早期互联网开发者发现数据和信息分解成小块，分批发送，然后再合并，可以更有效率的传输 。 这些块就叫数据包（packets）。
The early creators of the Internetdiscovered that data and information could be sent more efficiently when brokeninto smaller chunks, sent separately, and reassembled.
要显示统计信息(例如，提交的数据包)，可以键入下面的命令。
To show statistical information (for example, packets delivered), type.
基于网络的攻击：这些攻击依赖于对网络数据包的低层访问，试图通过修改通信流或者发现这些数据包中的信息来危害系统。
Network-based attacks: these attacks rely on low-level access to network packets and attempt to harm the system by altering this traffic or discovering information from these packets.
然后它用它自己注册的IP地址替换发送来的数据包的IP地址，并将端口号替换为该数据包的源计算机信息条目在表中的相应位置号。
It then replaces the IP address with its own registered IP address and the port number corresponding to the location of the entry for that packet's source computer in the table.
捕获原始数据包，使您能够了解哪些主机正在与给定的主机进行通信、正在交换什么信息，以及正在使用哪些信息。
Capturing raw packets enables you to see which hosts are communicating with a given host, what information is being exchanged, and which are being used.
在这个示例中，您可以看到原始以太网、IP和TCP数据包，包括源、目标主机的信息以及数据包选项。
In this case, you can see the raw Ethernet, IP, and TCP packet data, including the source and destination host information and packet options.
登录信息（凭据），稍后用于身份验证或者验证，与有效的远程调用一同传输，而不是在调用之前作为单独的数据包。
The login information (credentials), later used for authentication or validation, travels together with the effective remote call, not as a separate package preceding the call.
应用推荐