# How to know if it is multicast or unicast

**URL:** <https://community.wowza.com/t/how-to-know-if-it-is-multicast-or-unicast/37617>\
**Category:** Wowza Streaming Engine\
**Created:** [November 22, 2011, 6:16pm UTC](https://community.wowza.com/t/how-to-know-if-it-is-multicast-or-unicast/37617 "2011-11-22T18:16:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Reberto\_Ookla](https://avatars.discourse-cdn.com/v4/letter/r/7bcc69/32.png) [@Reberto\_Ookla](https://community.wowza.com/u/Reberto_Ookla)\
**Post date:** [November 22, 2011, 6:16pm UTC](https://community.wowza.com/t/how-to-know-if-it-is-multicast-or-unicast/37617/1 "2011-11-22T18:16:07Z")

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I use the module Multicast Publish as instructed. In the conf/multicastmap.txt I just left it empty. I teseted with VLC the following rtsp link

rtsp://[wowza-ip-address]:1935/edge/xxjjkshjou?multicastplay

VLC can stream it with no problem. My question is how do I know if this is multicast or unicast? Again I note that there is nothing in the file multicastmap.txt

Thanks

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**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\
**Post date:** [November 23, 2011, 5:14am UTC](https://community.wowza.com/t/how-to-know-if-it-is-multicast-or-unicast/37617/2 "2011-11-23T05:14:23Z")

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By the address being used to stream the content. This article covers the ranges:

[http://en.wikipedia.org/wiki/Multicast\_address](http://en.wikipedia.org/wiki/Multicast_address)

You can see the addresses being used for delivery in the Wowza Server logs when playback starts.

Charlie