Acronis License Server

Hi , I do have some question regarding the Acronis License Server.

1. What mean for the "Host name"
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Example :
Licensing Key : XXXX-XXXX-XXXX-0001
Host Name : ServerName123
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Under each license key , there is a Host name which listed my server name. is it mean this server is using my license ?

2. License Specification....
Any link available for me to check the differentiate for all type of acronis license? example , Acronis Backup Advance for multimode-platform able to support for 1 physical and XX virtual window.

Thank you very much,,