By default, both Apache and IIS embed data in the ETag that dramatically reduces the odds of the validity test succeeding on web sites with multiple servers.
默认情况下，Apache和IIS都会把数据嵌入ETag中，这会显著减少多服务器间的文件验证冲突。
Just like the desktop client above, we can embed our list of application servers into the client code. The web client contains a file called "servers.xml", which has a list of available servers.
就像桌面应用一样，我们可以把一个应用服务器列表嵌到客户端代码里，Web客户端包括一个称为Servers . XML的文件，它保存了可用服务器的列表。
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