Agentless and Agent Discovery

Hi Team,

I have installed UCMDB/UD 10.33 along with the dataprobe. I have asked the customer to open the dynamic port range i.e. 1024 - 65535 for WMI and 22 for SSH. I  am planning to do the agentless discovery so my question will i get the all the software details if i do an agentless discovery? Can someone explain  me in detail as what are the benifits from agent discovery compared to agentless discovery.

Thanks and Regards

Vinay S Kadival