Ace is shipped with a default license installed. (4GB badwidth, 1k ssl transcations/sec & 5 virtual contexts).
You can see the license using following command.
ACE/Admin# show license status
Licensed Feature Count
------------------------------ -----
SSL transactions per second 1000
Virtualized contexts 5
Module bandwidth in Gbps 4
If you want to increase contexts/throughput/SSL transactions then you will need to buy additional licenses.
For example for additional SSL transactions/sec
ACE-SSL-XXK-K9 (where XX could be 05/10/15/20)
Or For Additional Virtual Contexts
ACE-VIRT-XXX (where xxx represent no of contexts and options are 20,50,100,250)
Syed