Cloud-based firewall protects your internal network from malicious attacks such as viruses, worms, Trojans, spyware, adware, etc. The cloud firewall also helps prevent unauthorized access to data stored in the cloud.

There is no need to be specific when choosing between firewalls. Multiple firewalls provide multiple layers of security.

You may want to think about these factors too:

• How large is the organization. How big is the internal networking? Do you need a firewall for each device, or one that manages the entire internal network? When choosing between software and hardware firewalls, these questions are important to consider. Furthermore, the choice between the two will largely be determined by the technical skills of the team responsible for managing the setup.
• The resource availability. Can you afford to place the firewalls on a different piece of hardware or even in the cloud? The number of outgoing connections the firewall has to handle and whether they are going to be constant also play an important role.
• The levels of protections required. The number and type of firewalls should be determined by the level of the network’s requirements for secure communications. Businesses that deal with sensitive customer information must ensure that their firewalls are secure.

More info: Common IT Help Desk Problems and Solutions