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1·For example, in the simplest case, network sniffing is used to obtain passwords, and those passwords are then used to mount an application-level attack.

例如，在最简单的情况中，网络嗅探能够用于获取密码，然后这些密码可以用于进行应用级攻击。

2·Network sniffing is like one double-edged sword. It makes the network administrator convenience, but it also offers the hacker a tool to steal network information.

网络监听技术就像一把双刃剑，在提供给网络管理员管理网络的方便时也提供给黑客一个盗取网络信息的工具。

3·Many of the network sniffing tools already mentioned in this article provide varying levels of protocol decoding by looking at the port and content details to determine the protocol being used.

本文之前提到的许多网络嗅探工具都提供了不同级别的协议解码，它们是通过检查端口和内容来确定所使用的协议实现的。

4·Next, I'll give an example of an old (but still widely used) attack, which involves sniffing passwords right off the network.

接下来，我将给出一个老的(但仍广泛使用的)攻击示例，它就在网下嗅探密码。

5·For now, though, sniffing is a simple and useful way to make sure that Snort is not only installed, but working and capable of monitoring network traffic.

目前，嗅探是一种简单而有用的方法，能够确保Snort已安装且能够正常工作，能够监控网络流量。

6·Packet sniffing is great, but as you've seen, Snort's packet sniffing mode assumes you're hunched over your display, eagerly watching as thousands of lines of network data flies by.

包嗅探非常出色，但如您所见，Snort的包嗅探模式假设您一直关注着显示器，急切地查看数千行网络数据。

7·However, it adds complexity to tracking network issues that might normally be troubleshot by sniffing the network.

但是，它增加了跟踪网络问题的复杂性，这些网络问题通常可以通过嗅探网络发现并排除。

8·Sniffing is a common way in gathering and intercepting network data, but malicious sniffing often does great harm to network security.

嗅探是一种常见的网络数据采集和侦听方式，恶意嗅探对网络安全具有极大的危害。

9·Figure 1 and Figure 2 show how easily a Telnet session can be casually viewed by anyone on the network using a network-sniffing application such as Wireshark.

图1和图2展示如何使用一个像Wireshark这样的网络嗅探程序轻松让任何人随意查看telnet会话。