任务1：通过配置识别边缘服务器。
通过配置系统，让它能够识别边缘服务器。
Akamai边缘服务器向我们的数据中心发送请求。
The Akamai edge server sends the request to our data center.
下面的场景可能会用无效的数据“毒害”边缘服务器缓存。
Following is a scenario that can potentially "poison" the edge server cache with invalid data.
当用户请求一个对象时，请求先被转到Akamai边缘服务器。
When a user makes a request for an object, the request is first directed to the Akamai edge servers.
如果响应码是 200，边缘服务器会自动地缓存所有可缓存的内容。
The edge server will automatically cache any cacheable content if the response code is 200.
第一个任务是配置您的系统，让它能够识别Akamai边缘服务器。
The first task is to get your system configured so that it recognizes the Akamai edge servers.
如果在边缘服务器上有此内容，就从缓存取出内容并返回给用户。
If the content is available from the edge servers, it is returned to the user from the cache.
下载的文件首先复制到S3 存储桶中，然后复制到边缘服务器中。
The files to download are first copied to a S3 bucket, and are later replicated to the edge servers.
应用程序不发送正确的状态码看似没什么害处，但是在启用边缘服务器时这会成为真正的问题。
Failing to send the proper status code from your applications may seem harmless, but it can turn out to be a real problem when trying to enable to the edge server.
因为边缘服务器缓存的资源要在下一次请求时返回，一定要确保缓存的数据表示资源的正确内容。
Since a resource cached by the edge server is returned in the next request, it is very important to make sure the cached data represents the correct content of that resource.
当边缘服务器接收从到源服务器的内容，它将基于响应内容中的HTTP头建立内容的缓存。
When the edge server receives the response from the origin server, it stores the content in cache based on the HTTP headers of the response.
另一方面，如果在请求的内容不在缓存中或缓存已经过期，边缘服务器就会向源服务器发送请求来获得内容。
If, on the other hand, the content is not in the cache or the cache entry has expired, then the edge server makes a request to the origin server to retrieve the information.
有时候，有必要提前刷新akamai边缘服务器缓存的内容，而不是等到边缘服务器配置中指定的过期时间。
Sometimes it is necessary to refresh the content cached in Akamai edge servers without waiting for expiration that is specified in the edge server configuration.
tcp_hit值表明Akamai边缘服务器从缓存中返回此文件，并不需要通过访问我们的数据中心获取相同的文件。
The value TCP_HIT indicated that the Akamai edge server is returning the file from the cache and did not need to go back to our data center to fetch the same file.
这假设这些文本、图像、电子表格、音频文件都可以缓存，因为它们是静态的；把它们放在边缘服务器缓存中可以提高性能。
The assumption is that these text, image, stylesheets, audio files can be cached because they are static; that performance is increased by having them in the edge server caches.
同时，边缘服务器又作为第二层P 2 P网络终端的管理服务器，为用户安全、网络管理、终端服务提供保证。
At the same time, the edge server as a second layer P2P network terminal management to provide a guarantee for user security, network management, and terminal Services.
通过把这些对象缓存在更接近最终用户的边缘服务器上，Akamai可以减少从起源服务器获取静态内容所需的往返次数。
By caching these objects on the edge server closer to the end users, Akamai can reduce the number of round trips to retrieve static content from the origin server.
如果边缘服务器对于每一个请求都需要请求源服务器，那么它有没有价值的(事实上，成本比只是发送请求到源服务器本身还高)。
If an edge server needs to make a request to the origin server for every request, then it has no value (and in fact, costs more than just making the request to the origin server itself).
在逻辑上，流程代理程序是一个单独的实体，但在物理上，它是作为边缘服务器(edge server)的一个协作网络执行的。
Logically, the Process Brokers are a single entity, but are physically rendered as a collaborative network of edge servers.
避免Internet通信流拥挤：由于Internet通信流不稳定，起源服务器与Akamai边缘服务器之间的直接路由可能很拥挤。
Avoiding Internet traffic congestion: the direct route between the origin server and the Akamai edger servers may be congested because of Internet traffic.
如果拓扑中不考虑边缘页面组合，那么页面组合将由应用程序服务器完成(如果使用标记或cachespec .xml的启用ESI选项)，不再需要使用ESI标签。
If your topology does not take edge page assembly into account, then page assembly will be done by the application server if you use tags or the cachespec.xml.
就从边缘做起而言，Geronimo是一个免费的Web应用服务器并且任何人都可以安装。
As far as working from the edges, and not just the center, Geronimo is a free Web application server and may be installed by anyone.
AWSCloudFront用来允许用户从住处附近的Amazon“边缘”服务器下载课程视频和材料。
AWS CloudFront is used to allow users to download course videos and materials from an Amazon "edge" server that is closer to the location where the user lives.
在中间件层边缘(我们将边缘视为层次间转换发生的地点)，很可能会存在其他组件，如代理服务器等。
At the edge of the middleware tier (an edge is considered as a point where transition from one tier to another takes place), there are most likely found other components, such as proxy servers.
将中心服务器上的资源推送至网络边缘，缩短了用户和资源的距离。
It shortens the distance between users and resources by sending center server resources to edge of network.
若要满足远程邮件服务器规定的安全要求，可从您的边缘传输服务器连接到远程邮件服务器。
To satisfy security requirements that may be imposed by the remote messaging server, you can connect to the remote messaging server from your Edge Transport server.
同时，让边缘缓存服务器与邻近用户自发组建P 2 P下载网络，将资源更加边缘化，通过就近获取资源，提高下栽速度。
Meanwhile, edge cache server and its users nearby automatically construct P2P download network. So resources becoming more marginate and then users obtain the high download speed.
另外，虽然IRF能够实现从服务器边缘到核心的连接，但惠普能够保留第3层，并为通向外界的传统连接(如mpls或VPLS)支持网络分段。
Also, while IRF enables connectivity from the server edge to the core, HP can preserve the Layer 3 and up network segmentation for traditional connectivity, like MPLS or VPLS, to the outside world.
在现行的服务器上，火炮炮弹溅射半径的边缘是没有伤害的。
On live servers, arty deal no damage on the perimeter of their splash radius.
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