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windows/deployment/do/delivery-optimization-workflow.md
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@ -29,12 +29,12 @@ This workflow allows Delivery Optimization to securely and efficiently deliver r
2. The authenticity of the content metadata file itself is verified prior to any content being downloaded using a hash that is obtained via an SSL channel from the Delivery Optimization service. The same channel is used to ensure the content is curated and authorized to leverage peer-to-peer.
3. When Delivery Optimization pulls a certain piece of the hash from another peer, it verifies the hash against the known hash in the content metadata file.
4. If a peer provides an invalid piece, that piece is discarded. When a peer sends multiple bad pieces, it's banned and will no longer be used as a source by the Delivery Optimization client performing the download.
5. If Delivery Optimization is unable to obtain the content metadata file, or if the verification of the hash file itself fails, the download will fall back to “simple mode” (pulling content only from an HTTP source) and peer-to-peer won't be allowed.
5. If Delivery Optimization is unable to obtain the content metadata file, or if the verification of the hash file itself fails, the download will fall back to "simple mode” (pulling content only from an HTTP source) and peer-to-peer won't be allowed.
6. Once downloading is complete, Delivery Optimization uses all retrieved pieces of the content to put the file together. At that point, the Delivery Optimization caller (for example, Windows Update) checks the entire file to verify the signature prior to installing it.
## Delivery Optimization service endpoint and data information
|Endpoint hostname|Port|Name|Description|Data sent from the computer to the endpoint
|Endpoint hostname | Port|Name|Description|Data sent from the computer to the endpoint
|--------------------------------------------|--------|---------------|-----------------------|------------------------|
| geover-prod.do.dsp.mp.microsoft.com <br> geo-prod.do.dsp.mp.microsoft.com <br> geo.prod.do.dsp.mp.microsoft.com <br> geover.prod.do.dsp.mp.microsoft.com | 443 | Geo | Service used to identify the location of the device in order to direct it to the nearest data center. | **Profile**: The device type (for example, PC or Xbox) <br> **doClientVersion**: The version of the DoSvc client <br> **groupID**: Group the device belongs to (set with DownloadMode = '2' (Group download mode) + groupID group policy / MDM policies) |
| kv\*.prod.do.dsp.mp.microsoft.com | 443| KeyValue | Bootstrap service provides endpoints for all other services as well as device configs. | **countryCode**: The country the client is connected from <br> **doClientVersion**: The version of the DoSvc client <br> **Profile**: The device type (for example, PC or Xbox) <br> **eId**: Client grouping Id <br> **CacheHost**: Cache host id |