Is there a case where you may not choose to deploy a firewal

Is there a case where you may not choose to deploy a firewall? If so, what other network design features might you use? What processes? If not, what is the firewall going to be providing for you?

Solution

n some applications, which mostly working on protocols on voice or video applications the firewall will block localhost packets to send and receive. They will be allowed by firewall on https pnly. In such cases firewall deployment is not chosen.In such cases we beed to install custom firewall by configuring to allow these applications.