# Hybrid mode with server-side ad beacons
<a name="ad-reporting-hybrid-mode"></a>

MediaTailor supports a hybrid mode for session tracking. In this mode, the service emits playback-related ad-tracking events, but makes the complete client-side tracking payload available for the session

To enable hybrid tracking using playback prefixes, from the player initialize a new MediaTailor playback session using a request in one of the following formats, according to your protocol:

**Example : HLS format**  

```
POST master.m3u8
    {
        "adsParams": {
           "deviceType": "ipad"
       },
       "reportingMode":"server"
    }
```

**Example : DASH format**  

```
POST manifest.mpd
    {
        "adsParams": {
           "deviceType": "ipad"
       },
       "reportingMode":"server"
    }
```

MediaTailor maintains the following tracking events in hybrid mode:
+ Impression
+ Start
+ First quartile
+ Midpoint
+ Third quartile
+ Complete
+ `breakStart` (vmap)
+ `breakEnd` (vmap)