并且，正如我们可以从本系列的第2部分有关数字证书的讨论中看到的一样，服务器还必须要在握手过程中提供安全证书。

And, as you might recall from the digital certificates discussion in Part 2 of this series, the server must also provide the security certificate used during the handshake.

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许多步骤已经在第1部分中详述，因此这里不再重复，但是步骤6和7特定于DMZ安全代理服务器及其跨超级集群路由的能力。

Many of these steps were detailed in Part 1 and so won't be repeated here, but steps 6 and 7 are specific to a DMZ secure proxy server and its ability to route across a super cluster.

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本系列的第1部分详细讨论了同一域问题，出于安全上的考虑将XMLHttp请求限制到提供原始web页面的同一台服务器上。

The same domain problem, explained in more detail in Part 1 of this series, is a security limitation that restricts XMLHttp requests to the same server that delivered the original Web page.

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