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windows/deployment/do/waas-delivery-optimization-faq.yml
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@ -12,7 +12,7 @@ metadata:
- highpri - highpri
- tier3 - tier3
ms.topic: faq ms.topic: faq
ms.date: 06/28/2023 ms.date: 07/11/2023
title: Delivery Optimization Frequently Asked Questions title: Delivery Optimization Frequently Asked Questions
summary: | summary: |
**Applies to** **Applies to**
@ -35,7 +35,7 @@ sections:
- question: What are the requirements if I use a proxy? - question: What are the requirements if I use a proxy?
answer: For Delivery Optimization to successfully use the proxy, you should set up the proxy by using Windows proxy settings or Internet Explorer proxy settings. For details see [Using a proxy with Delivery Optimization](../do/delivery-optimization-proxy.md). Most content downloaded with Delivery Optimization uses byte range requests. Make sure your proxy allows byte range requests. For more information, see [Proxy requirements for Windows Update](/windows/deployment/update/windows-update-troubleshooting). answer: For Delivery Optimization to successfully use the proxy, you should set up the proxy by using Windows proxy settings or Internet Explorer proxy settings. For details see [Using a proxy with Delivery Optimization](../do/delivery-optimization-proxy.md). Most content downloaded with Delivery Optimization uses byte range requests. Make sure your proxy allows byte range requests. For more information, see [Proxy requirements for Windows Update](/windows/deployment/update/windows-update-troubleshooting).
- question: What hostnames should I allow through my firewall to support Delivery Optimization? - question: What hostnames should I allow through my firewall to support Delivery Optimization?
answer: | answer: |
**For communication between clients and the Delivery Optimization cloud service**: **For communication between clients and the Delivery Optimization cloud service**:
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For more information, see [Endpoints for Delivery Optimization and Microsoft Connected Cache](../do/delivery-optimization-endpoints.md) for a list of all content endpoints needed. For more information, see [Endpoints for Delivery Optimization and Microsoft Connected Cache](../do/delivery-optimization-endpoints.md) for a list of all content endpoints needed.
- question: My firewall requires IP Address and cannot process FQDNs, how do I configure it to download content with Delivery Optimization? - question: My firewall requires IP Address and cannot process FQDNs, how do I configure it to download content with Delivery Optimization?
answer: | answer: |
Microsoft content such as Windows Updates are hosted and delivered globally via Content Delivery Networks (CDNs) as well as Microsoft's Connected Cache (MCC) servers which are hosted within Internet Service Provider (ISP) networks. Microsoft content such as Windows Updates are hosted and delivered globally via Content Delivery Networks (CDNs) as well as Microsoft's Connected Cache (MCC) servers which are hosted within Internet Service Provider (ISP) networks.
The network of CDNs and MCCs allows Microsoft to reach the scale required to meet the demand of the Windows user base. Given this delivery infrastructure changes dynamically, providing an exhaustive list of IPs and keeping it up to date is not feasible. The network of CDNs and MCCs allows Microsoft to reach the scale required to meet the demand of the Windows user base. Given this delivery infrastructure changes dynamically, providing an exhaustive list of IPs and keeping it up to date is not feasible.
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- question: How are downloads initiated by Delivery Optimization? - question: How are downloads initiated by Delivery Optimization?
answer: | answer: |
Delivery Optimization only starts when an application or service that's integrated with Delivery Optimization starts a download. For example, the Microsoft Edge browser. For more information about Delivery Optimization callers, see [Types of download content supported by Delivery Optimization](waas-delivery-optimization.md#types-of-download-content-supported-by-delivery-optimization). Delivery Optimization only starts when an application or service that's integrated with Delivery Optimization starts a download. For example, the Microsoft Edge browser. For more information about Delivery Optimization callers, see [Types of download content supported by Delivery Optimization](waas-delivery-optimization.md#types-of-download-content-supported-by-delivery-optimization).
- question: How does Delivery Optimization determine which content is available for peering? - question: How does Delivery Optimization determine which content is available for peering?
answer: | answer: |
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Delivery Optimization is an HTTP downloader used by most content providers from Microsoft. When a device is configured to use Delivery Optimization peering (on by default), it does so with the HTTP downloader capabilities to optimize bandwidth usage. Delivery Optimization is an HTTP downloader used by most content providers from Microsoft. When a device is configured to use Delivery Optimization peering (on by default), it does so with the HTTP downloader capabilities to optimize bandwidth usage.
If you'd like to disable peer-to-peer capabilities of Delivery Optimization, change the Delivery Optimization [Download mode](waas-delivery-optimization-reference.md#download-mode) setting to '0', which will disable peer-to-peer and provide hash checks. [Download mode](waas-delivery-optimization-reference.md#download-mode) set to '99' should only be used when the device is offline and doesn't have internet access. If you'd like to disable peer-to-peer capabilities of Delivery Optimization, change the Delivery Optimization [Download mode](waas-delivery-optimization-reference.md#download-mode) setting to '0', which will disable peer-to-peer and provide hash checks. [Download mode](waas-delivery-optimization-reference.md#download-mode) set to '99' should only be used when the device is offline and doesn't have internet access.
Don't set **Download mode** to '100' (Bypass), which can cause some content to fail to download. Starting in Windows 11, Download mode '100' is deprecated. Don't set **Download mode** to '100' (Bypass), which can cause some content to fail to download. Starting in Windows 11, Download mode '100' is deprecated.
> [!NOTE] > [!NOTE]
> Disabling Delivery Optimization won't prevent content from downloading to your devices. If you're looking to pause updates, you need to set policies for the relevant components such as Windows Update, Windows Store or Edge browser. If you're looking to reduce the load on your network, look into using Delivery Optimization Peer-to-Peer, Microsoft Connected Cache or apply the [network throttling policies](waas-delivery-optimization-reference.md#maximum-download-bandwidth) available for Delivery Optimization. > Disabling Delivery Optimization won't prevent content from downloading to your devices. If you're looking to pause updates, you need to set policies for the relevant components such as Windows Update, Windows Store or Edge browser. If you're looking to reduce the load on your network, look into using Delivery Optimization Peer-to-Peer, Microsoft Connected Cache or apply the [network throttling policies](waas-delivery-optimization-reference.md#maximum-download-bandwidth) available for Delivery Optimization.