What is a primary difference between the web security features of the Cisco WSA+Firepower and the Cisco ASA NGFW?

[prashant dwivedi]

Team,

I want to know what Cisco FW having firepower module cant do that Cisco WSA can ?

I mean is it still required to use WSA if we have NGFW with firepower module ?

I think NGFW should be able to replace WSA/ironport and ESA  .

Thanks,

Prashant