内容分发网络 (CDN)Content Delivery Networks (CDNs)

本文适用于 Microsoft 365 企业版和 Office 365 企业版。This article applies to both Microsoft 365 Enterprise and Office 365 Enterprise.

Cdn 帮助使最终用户的 Office 365 快速而可靠。CDNs help keep Office 365 fast and reliable for end users. 云服务(如 Office 365)使用 Cdn 将静态资产缓存在更接近的浏览器上,以加快下载速度并降低感觉到的最终用户延迟。Cloud services like Office 365 use CDNs to cache static assets closer to the browsers requesting them to speed up downloads and reduce perceived end user latency. 本主题中的信息将帮助您了解内容传递网络(Cdn)及其在 Office 365 中的使用方式。The information in this topic will help you learn about Content Delivery Networks (CDNs) and how they are used by Office 365.

CDN 究竟是什么?What exactly is a CDN?

CDN 是地理位置分散的网络,由高速骨干网连接的数据中心中的代理服务器和文件服务器组成。A CDN is a geographically distributed network consisting of proxy and file servers in datacenters connected by high-speed backbone networks. Cdn 用于减少网站或服务中一组指定的文件和对象的延迟和加载时间。CDNs are used to reduce latency and load times for a specified set of files and objects in a web site or service. CDN 可能有数千个终结点,可用于从任何位置对传入请求进行最佳处理。A CDN may have many thousands of endpoints for optimal servicing of incoming requests from any location.

Cdn 通常用于为网站或服务(如 javascript 文件、图标和图像)提供更快的常规内容下载,还可以提供对用户内容(如 SharePoint Online 文档库中的文件、流式处理媒体文件和自定义代码)的专用访问。CDNs are commonly used to provide faster downloads of generic content for a web site or service such as javascript files, icons and images, and can also provide private access to user content such as files in SharePoint Online document libraries, streaming media files, and custom code.

Cdn 由大多数企业云服务使用。CDNs are used by most enterprise cloud services. 云服务(如 Office 365)有数百万个客户同时下载专有内容(如电子邮件)和通用内容(如图标)。Cloud services like Office 365 have millions of customers downloading a mix of proprietary content (such as emails) and generic content (such as icons) at one time. 将图像作为每个人使用的图像(如图标)更有效,尽可能接近用户的计算机。It's more efficient to put images everyone uses, like icons, as close to the user's computer as possible. 在每个大都市区域中(甚至在世界各地的每个主要 Internet 集线器中)构建 CDN 数据中心时,每个云服务都不切合实际,因此其中一些 Cdn 是共享的。It isn't practical for every cloud service to build CDN datacenters that store this generic content in every metropolitan area, or even in every major Internet hub around the world, so some of these CDNs are shared.

Cdn 如何使服务更快地工作?How do CDNs make services work faster?

同时下载常见对象(如网站图像和图标)可能会占用网络带宽,可以更好地用于下载重要的个人内容,如电子邮件或文档。Downloading common objects like site images and icons over and over again can take up network bandwidth that can be better used for downloading important personal content, like email or documents. 由于 Office 365 使用包含 Cdn 的体系结构,因此可以从更接近客户端计算机的服务器上下载图标、脚本和其他通用内容,从而使下载速度更快。Because Office 365 uses an architecture that includes CDNs, the icons, scripts, and other generic content can be downloaded from servers closer to client computers, making the downloads faster. 这意味着可以更快地访问你的个人内容,这会在 Office 365 数据中心中安全存储。This means faster access to your personal content, which is securely stored in Office 365 datacenters.

Cdn 帮助以多种方式改进云服务性能:CDNs help to improve cloud service performance in several ways:

  • Cdn 将网络和文件下载负担的一部分从云服务中移出,从而通过减少为静态资产提供服务请求的需求而释放云服务资源,以提供用户内容和其他服务。CDNs shift part of the network and file download burden away from the cloud service, freeing up cloud service resources for serving user content and other services by reducing the need to serve requests for static assets.
  • Cdn 是专门为提供低延迟文件访问而构建的,通过实现高性能的网络和文件服务器,以及利用更新的网络协议(如HTTP/2 )以及高效率的压缩和请求多路复用。CDNs are purpose built to provide low-latency file access by implementing high performance networks and file servers, and by leveraging updated network protocols such as HTTP/2 with highly efficient compression and request multiplexing.
  • CDN 网络使用许多全局分布式终结点使内容可尽可能接近用户。CDN networks use many globally distributed endpoints to make content available as close as possible to users.

Office 365 CDNThe Office 365 CDN

内置的 Office 365 内容传递网络(CDN)使 Office 365 管理员能够为其组织的 SharePoint Online 页面提供更好的性能,具体方法是缓存静态资产,使其更接近请求的浏览器,这有助于加快下载速度并减少延迟。The built-in Office 365 Content Delivery Network (CDN) allows Office 365 administrators to provide better performance for their organization's SharePoint Online pages by caching static assets closer to the browsers requesting them, which helps to speed up downloads and reduce latency. Office 365 CDN 使用HTTP/2 协议改进了压缩和下载速度。The Office 365 CDN uses the HTTP/2 protocol for improved compression and download speeds.

备注

Office 365 CDN 仅适用于生产(全球)云中的租户。The Office 365 CDN is only available to tenants in the Production (worldwide) cloud. 美国政府、中国和德国云中的租户目前不支持 Office 365 CDN。Tenants in the US Government, China and Germany clouds do not currently support the Office 365 CDN.

Office 365 CDN 由多个 CDN 组成,用户可以在多个位置(即_源_)托管静态资产,并从全局高速网络提供这些资产。The Office 365 CDN is composed of multiple CDNs that allow you to host static assets in multiple locations, or origins, and serve them from global high-speed networks. 可以添加公共源、私有源或同时添加这两种源,具体取决于想要托管在 Office 365 CDN 中的内容种类。Depending on the kind of content you want to host in the Office 365 CDN, you can add public origins, private origins or both.

Office 365 CDN 概念图Office 365 CDN conceptual diagram

Office 365 内的公共源中的内容可供匿名访问,并且任何具有托管资产 URL 的人员均可访问它。Content in public origins within the Office 365 CDN is accessible anonymously, and can be accessed by anyone who has URLs to hosted assets. 由于对公共源中内容的访问属于匿名访问,因此只能使用它们缓存非敏感的常规内容,如 javascript 文件、脚本、图标和图片。Because access to content in public origins is anonymous, you should only use them to cache non-sensitive generic content such as javascript files, scripts, icons and images. 默认情况下,使用 Office 365 CDN 下载常规资源资产(如公共源中的 Office 365 客户端应用程序)。The Office 365 CDN is used by default for downloading generic resource assets like the Office 365 client applications from a public origin.

Office 365 CDN 内的专用来源提供对用户内容(如 SharePoint Online 文档库、网站和专有图像)的专用访问。Private origins within the Office 365 CDN provide private access to user content such as SharePoint Online document libraries, sites and proprietary images. 使用动态生成的令牌保护为私有源中内容的访问提供保护,以便只有有权访问原始文档库或存储位置的用户才能访问它。Access to content in private origins is secured with dynamically generated tokens so it can only be accessed by users with permissions to the original document library or storage location. Office 365 CDN 中的私有源只能用于 SharePoint Online 内容,并且用户只能通过 SharePoint Online 租户重定向访问资产。Private origins in the Office 365 CDN can only be used for SharePoint Online content, and you can only access assets through redirection from your SharePoint Online tenant.

Office 365 CDN 服务被归入 SharePoint Online 订阅。The Office 365 CDN service is included as part of your SharePoint Online subscription.

有关如何使用 Office 365 CDN 的详细信息,请参阅将 office 365 内容传送网络与 SharePoint Online 结合使用For more information about how to use the Office 365 CDN, see Use the Office 365 content delivery network with SharePoint Online.

若要观看一系列简短视频,以提供有关使用 Office 365 CDN 的概念性和 HOWTO 信息,请访问SharePoint 开发人员模式和实践 YouTube 频道To watch a series of short videos that provide conceptual and HOWTO information about using the Office 365 CDN, visit the SharePoint Developer Patterns and Practices YouTube channel.

其他 Microsoft CdnOther Microsoft CDNs

尽管不是 Office 365 CDN 的一部分,但您可以在 Office 365 租户中使用这些 Cdn 来访问 SharePoint 开发库、自定义代码和其他在 Office 365 CDN 范围之外的用途。Although not a part of the Office 365 CDN, you can use these CDNs in your Office 365 tenant for access to SharePoint development libraries, custom code and other purposes that fall outside the scope of the Office 365 CDN.

Azure CDNAzure CDN

备注

从2020年3季度开始,SharePoint Online 将开始在 Azure CDN 上缓存视频,以支持改进的视频播放和可靠性。Beginning in Q3 2020, SharePoint Online will begin caching videos on the Azure CDN to support improved video playback and reliability. 热门视频将从最接近用户的 CDN 终结点流动。Popular videos will be streamed from the CDN endpoint closest to the user. 此数据将保留在 Microsoft 365 合规性边界内。This data will remain within the Microsoft 365 compliance boundary. 这是所有租户的免费服务,不需要任何客户操作即可进行配置。This is a free service for all tenants and it does not require any customer action to configure.

您可以使用AZURE cdn来部署自己的 cdn 实例,以托管自定义 web 部件、库和其他资源资产,从而使您可以对 cdn 存储应用访问密钥,并对 cdn 配置进行更好的控制。You can use the Azure CDN to deploy your own CDN instance for hosting custom web parts, libraries and other resource assets, which allows you to apply access keys to your CDN storage and exert greater control over your CDN configuration. Azure CDN 的使用不是免费的,需要 Azure 订阅。Use of the Azure CDN is not free, and requires an Azure subscription.

有关如何配置 Azure CDN 实例的详细信息,请参阅快速入门:将 azure 存储帐户与 AZURE Cdn 集成For more information on how to configure an Azure CDN instance, see Quickstart: Integrate an Azure storage account with Azure CDN.

有关如何将 Azure CDN 用于承载 SharePoint web 部件的示例,请参阅将 SharePoint 客户端 web 部件部署到 AZURE CDNFor an example of how the Azure CDN can be used to host SharePoint web parts, see Deploy your SharePoint client-side web part to Azure CDN.

有关 Azure CDN PowerShell 模块的详细信息,请参阅使用 PowerShell 管理 AZURE CDNFor information about the Azure CDN PowerShell module, see Manage Azure CDN with PowerShell.

Microsoft Ajax CDNMicrosoft Ajax CDN

Microsoft 的AJAX cdn是一个只读的 cdn,可提供多种流行的开发库,包括 jQuery (及其所有其他库)、ASP.NET Ajax、启动、Knockout.js 和其他。Microsoft's Ajax CDN is a read-only CDN that offers many popular development libraries including jQuery (and all of its other libraries), ASP.NET Ajax, Bootstrap, Knockout.js, and others.

若要将这些脚本包含在项目中,只需将对这些公开的可用库的任何引用替换为对 CDN 地址的引用,而不是将其包含在项目本身中。To include these scripts in your project, simply replace any references to these publicly available libraries with references to the CDN address instead of including it in your project itself. 例如,使用以下代码链接到 jQuery:For example, use the following code to link to jQuery:

<script src=https://ajax.aspnetcdn.com/ajax/jquery-2.1.1.js> </script>

有关如何使用 Microsoft Ajax CDN 的详细信息,请参阅Microsoft AJAX cdnFor more information about how to use the Microsoft Ajax CDN, see Microsoft Ajax CDN.

Office 365 如何使用 CDN 中的内容?How does Office 365 use content from a CDN?

无论您为 Office 365 租户配置了什么 CDN,基本数据检索过程都是相同的。Regardless of what CDN you configure for your Office 365 tenant, the basic data retrieval process is the same.

  1. 您的客户端(浏览器或 Office 客户端应用程序)从 Office 365 请求数据。Your client (a browser or Office client application) requests data from Office 365.

  2. Office 365 或者将数据直接返回到客户端,如果数据是由 CDN 托管的一组内容中的一部分,则将客户端重定向到 CDN URL。Office 365 either returns the data directly to your client or, if the data is part of a set of content hosted by the CDN, redirects your client to the CDN URL.

    a.a. 如果数据已缓存在_公用_源中,客户端将直接从最近的 CDN 位置将数据下载到客户端。If the data is already cached in a public origin, your client downloads the data directly from the nearest CDN location to your client.

    b.b. 如果数据已缓存在_专用_源中,则 CDN 服务将检查您的 Office 365 用户帐户对源的权限。If the data is already cached in a private origin, the CDN service checks your Office 365 user account's permissions on the origin. 如果您拥有权限,SharePoint Online 将动态生成由 CDN 和两个访问令牌中的资产路径组成的自定义 URL,并将自定义 URL 返回给客户端。If you have permissions, SharePoint Online dynamically generates a custom URL composed of the path to the asset in the CDN and two access tokens, and returns the custom URL to your client. 然后,您的客户端使用自定义 URL 直接将数据从最近的 CDN 位置下载到客户端。Your client then downloads the data directly from the nearest CDN location to your client using the custom URL.

  3. 如果数据未在 CDN 上缓存,则 CDN 节点从 Office 365 请求数据,然后在客户端下载数据后将数据缓存一段时间。If the data isn't cached at the CDN, the CDN node requests the data from Office 365 and then caches the data for a period of time after your client downloads the data.

CDN 将最接近的数据中心输出到用户的浏览器,使用重定向,从那里下载请求的数据。The CDN figures out the closest datacenter to the user's browser and, using redirection, downloads the requested data from there. CDN 重定向是快速的,可节省用户大量下载时间。CDN redirection is quick, and can save users a lot of download time.

我应该如何设置我的网络,以便 Cdn 最适合使用 Office 365?How should I set up my network so that CDNs work best with Office 365?

在网络上的客户端和 CDN 终结点之间最大限度地减少延迟是确保最佳性能的主要注意事项。Minimizing latency between clients on your network and CDN endpoints is the key consideration for ensuring optimal performance. 您可以使用管理 Office 365 终结点中概述的最佳做法,以确保您的网络配置允许客户端浏览器直接访问 cdn,而不是通过中央代理路由 cdn 通信以避免引入不必要的延迟。You can use the best practices outlined in Managing Office 365 endpoints to ensure that your network configuration permits client browsers to access the CDN directly rather than routing CDN traffic through central proxies to avoid introducing unnecessary latency.

您还可以阅读office 365 网络连接原则,了解优化 Office 365 网络性能背后的概念。You can also read Office 365 Network Connectivity Principles to understand the concepts behind optimizing Office 365 network performance.

是否有 Office 365 使用的所有 Cdn 的列表?Is there a list of all the CDNs that Office 365 uses?

Office 365 中使用的 Cdn 始终可能会发生更改,在许多情况下,事件1中配置了多个 CDN 伙伴不可用。The CDNs in use by Office 365 are always subject to change and in many cases there are multiple CDN partners configured in the event one is unavailable. Office 365 使用的主 Cdn 为:The primary CDNs used by Office 365 are:

CDNCDN CompanyCompany 用法Usage 链接Link
Office 365 CDNOffice 365 CDN AkamaiAkamai 公用源中的常规资产,私人来源中的 SharePoint 用户内容Generic assets in public origins, SharePoint user content in private origins 结合使用 Office 365 内容传送网络和 SharePoint OnlineUse the Office 365 content delivery network with SharePoint Online
Azure CDNAzure CDN MicrosoftMicrosoft 自定义代码、SharePoint 框架解决方案Custom code, SharePoint Framework solutions Microsoft Azure CDNMicrosoft Azure CDN
Microsoft Ajax CDN (只读)Microsoft Ajax CDN (read only) MicrosoftMicrosoft 适用于 Ajax、jQuery、ASP.NET、引导 Knockout.js 等的通用库。Common libraries for Ajax, jQuery, ASP.NET, Bootstrap, Knockout.js etc. Microsoft Ajax CDNMicrosoft Ajax CDN

CDN 提供了哪些性能提升?What performance gains does a CDN provide?

在从 Office 365 直接下载的数据与从特定 CDN 下载的数据(如相对于租户的位置和最近的 CDN 终结点)之间测量性能的具体差异时,有许多因素涉及到由 CDN 提供服务的页面上的资产数,以及网络延迟和带宽的瞬间更改。There are many factors involved in measuring specific differences in performance between data downloaded directly from Office 365 and data downloaded from a specific CDN, such as your location relative to your tenant and to the nearest CDN endpoint, the number of assets on a page that are served by the CDN, and transient changes in network latency and bandwidth. 但是,简单的 A/B 测试可以帮助显示特定文件的下载时间的差异。However, a simple A/B test can help to show the difference in download time for a specific file.

下面的屏幕截图展示了 Office 365 中的本机文件位置与在Microsoft Ajax 内容传递网络上托管的相同文件之间的下载速度差异。The following screen shots illustrate the difference in download speed between the native file location in Office 365 and the same file hosted on the Microsoft Ajax Content Delivery Network. 这些屏幕截图来自 Internet Explorer 11 开发人员工具中的 "网络" 选项卡。These screen shots are from the Network tab in the Internet Explorer 11 developer tools. 这些屏幕截图显示热门库 jQuery 的延迟。These screen shots show the latency on the popular library jQuery. 若要弹出此屏幕,请在 Internet Explorer 中,按F12键并选择 "网络" 选项卡,该选项卡 symbolized 带有 wi-fi 图标。To bring up this screen, in Internet Explorer, press F12 and select the Network tab which is symbolized with a Wi-Fi icon.

F12 网络的屏幕截图

此屏幕截图显示了上载到 SharePoint Online 网站上的母版页样式库的库。This screen shot shows the library uploaded to the master page gallery on the SharePoint Online site itself. 上载库所需的时间为1.51 秒。The time it took to upload the library is 1.51 seconds.

加载时间为 1.51 秒的屏幕截图

第二个屏幕截图显示了由 Microsoft 的 CDN 提供的相同文件。The second screen shot shows the same file delivered by Microsoft's CDN. 这次延迟约为496毫秒。This time the latency is around 496 milliseconds. 这是一项较大的改进,并显示了整秒的 shaved,以下载该对象的总时间。This is a large improvement and shows that a whole second is shaved off the total time to download the object.

加载时间为 469 毫秒的屏幕截图

我的数据是否安全?Is my data safe?

我们非常重视保护企业运营的数据。We take great care to protect the data that runs your business. 存储在 Office 365 CDN 中的数据在传输过程和静态数据中均进行加密,并且 Office 365 SharePoint CDN 中的数据访问受 Office 365 用户权限和令牌授权的保护。Data stored in the Office 365 CDN is encrypted both in transit and at rest, and access to data in the Office 365 SharePoint CDN is secured by Office 365 user permissions and token authorization. 必须从你的 Office 365 租户中引用(重定向) Office 365 SharePoint CDN 中的数据请求,否则将不会生成授权令牌。Requests for data in the Office 365 SharePoint CDN must be referred (redirected) from your Office 365 tenant or an authorization token will not be generated.

为了确保您的数据保持安全,我们建议您不要将用户内容或其他敏感数据存储在公用 CDN 中。To ensure that your data remains secure, we recommend that you never store user content or other sensitive data in a public CDN. 由于对公用 CDN 中的数据的访问是匿名的,因此公共 Cdn 应仅用于承载 web 脚本文件、图标、图像和其他非敏感资产等通用内容。Because access to data in a public CDN is anonymous, public CDNs should only be used to host generic content such as web script files, icons, images and other non-sensitive assets.

备注

第三方 CDN 提供程序可能具有与 Office 365 信任中心所述的承诺不同的隐私和合规性标准。3rd party CDN providers may have privacy and compliance standards that differ from the commitments outlined by the Office 365 Trust Center. 通过 CDN 服务缓存的数据可能不符合 Microsoft 数据处理术语(DPT),并且可能位于 Office 365 信任中心合规性边界之外。Data cached through the CDN service may not conform to the Microsoft Data Processing Terms (DPT), and may be outside of the Office 365 Trust Center compliance boundaries.

有关 Office 365 CDN 提供程序的隐私和数据保护的详细信息,请访问以下内容:For in-depth information about privacy and data protection for Office 365 CDN providers, visit the following:

如何使用所有这些第三方服务保护我的网络?How can I secure my network with all these 3rd party services?

利用广泛的合作伙伴服务集,Office 365 可以在使用 Office 365 时扩展和满足可用性要求,并增强用户体验。Leveraging an extensive set of partner services allows Office 365 to scale and meet availability requirements as well as enhance the user experience when using Office 365. 第三方服务 Office 365 利用了证书吊销列表,它们包括:如 crl.microsoft.com 或 sa.symcb.com,以及 Cdn;例如 r3.res.outlook.com。The 3rd party services Office 365 leverages include both certificate revocation lists; such as crl.microsoft.com or sa.symcb.com, and CDNs; such as r3.res.outlook.com. Office 365 生成的每个 CDN FQDN 都是 Office 365 的自定义 FQDN。Every CDN FQDN generated by Office 365 is a custom FQDN for Office 365. 如果您是在 Office 365 请求时发送到 FQDN,则可以确保 CDN 提供程序控制该位置的 FQDN 和基础内容。If you're sent to a FQDN at the request of Office 365 you can be assured that the CDN provider controls the FQDN and the underlying content at that location.

对于要将发往 Microsoft 或 Office 365 数据中心的请求与发往第三方的请求隔离的客户,我们编写了有关管理 Office 365 终结点的指南。For customers that want to segregate requests destined for a Microsoft or Office 365 datacenter from requests that are destined for a 3rd party, we've written up guidance on Managing Office 365 endpoints.

是否存在利用 Cdn 的所有 Fqdn 的列表?Is there a list of all the FQDNs that leverage CDNs?

Fqdn 列表以及它们如何利用 Cdn 在一段时间内的变化。The list of FQDNs and how they leverage CDNs change over time. 请参阅我们发布的Office 365 url 和 IP 地址范围页面,获取最新使用 Cdn 的 fqdn 的日期。Refer to our published Office 365 URLs and IP address ranges page to get up to date on the latest FQDNs that leverage CDNs.

您还可以使用Office 365 IP 地址和 URL Web 服务请求当前的 Office 365 url 和使用 CSV 或 JSON 格式的 IP 地址范围。You can also use the Office 365 IP Address and URL Web service to request the current Office 365 URLs and IP address ranges formatted as CSV or JSON.

我可以在本地网络上使用我自己的 CDN 和缓存内容吗?Can I use my own CDN and cache content on my local network?

我们正在不断寻找新的方法来支持我们的客户需求,目前正在探索缓存代理解决方案和其他本地 CDN 解决方案的使用。We're continually looking for new ways to support our customers needs and are currently exploring the use of caching proxy solutions and other on-premises CDN solutions.

尽管它不是 Office 365 CDN 的一部分,但您也可以使用AZURE cdn来承载自定义 web 部件、库和其他资源资产,这样您就可以对 cdn 存储应用访问密钥,并对 cdn 配置进行更好的控制。Although it is not a part of the Office 365 CDN, you can also use the Azure CDN for hosting custom web parts, libraries and other resource assets, which allows you to apply access keys to your CDN storage and exert greater control over your CDN configuration. Azure CDN 的使用不是免费的,需要 Azure 订阅。Use of the Azure CDN is not free, and requires an Azure subscription. 有关如何配置 Azure CDN 实例的详细信息,请参阅快速入门:将 azure 存储帐户与 AZURE Cdn 集成For more information on how to configure an Azure CDN instance, see Quickstart: Integrate an Azure storage account with Azure CDN.

我使用的是适用于 Office 365 的 Azure ExpressRoute,是否会改变内容?I'm using Azure ExpressRoute for Office 365, does that change things?

适用于 office 365 的 Azure ExpressRoute提供了与公共 internet 隔离的 office 365 基础结构的专用连接。Azure ExpressRoute for Office 365 provides a dedicated connection to Office 365 infrastructure that is segregated from the public internet. 这意味着客户端仍需要通过非 ExpressRoute 连接进行连接,以连接到 Cdn,而不是显式包含在 ExpressRoute 支持的服务列表中的其他 Microsoft 基础结构。This means that clients will still need to connect over non-ExpressRoute connections to connect to CDNs and other Microsoft infrastructure that is not explicitly included in the list of services supported by ExpressRoute. 有关如何路由特定流量(如发往 Cdn 的请求)的详细信息,请参阅Office 365 网络流量管理For more information about how to route specific traffic such as requests destined for CDNs, refer to Office 365 network traffic management.

我可以将 Cdn 用于本地 SharePoint Server 吗?Can I use CDNs with SharePoint Server on-premises?

使用 Cdn 仅在 SharePoint Online 上下文中有意义,应避免使用 SharePoint Server。Using CDNs only makes sense in a SharePoint Online context and should be avoided with SharePoint Server. 这是因为,如果服务器位于本地或地理位置,则与地理位置有关的所有优势都不成立。This is because all of the advantages around geographic location do not hold true if the server is located on-premises or geographically close anyway. 此外,如果与托管的服务器之间存在网络连接,则可以在没有 Internet 连接的情况下使用网站,因此无法检索 CDN 文件。Additionally, if there is a network connection to the servers where it's hosted, then the site may be used without an Internet connection and therefore cannot retrieve the CDN files. 否则,如果您的网站所需的库和文件有一个可用且稳定的功能,则应使用 CDN。Otherwise, you should use a CDN if there is one available and stable for the library and files you need for your site.

以下是可以用于返回的简短链接:https://aka.ms/o365cdnsHere's a short link you can use to come back: https://aka.ms/o365cdns

另请参阅See also

Office 365 网络连接原则Office 365 Network Connectivity Principles

评估 Office 365 网络连接Assessing Office 365 network connectivity

管理 Office 365 终结点Managing Office 365 endpoints

Office 365 URL 和 IP 地址范围Office 365 URLs and IP address ranges

结合使用 Office 365 内容传送网络和 SharePoint OnlineUse the Office 365 content delivery network with SharePoint Online

Microsoft 信任中心Microsoft Trust Center

优化 Office 365 性能Tune Office 365 performance