What is the difference between a virtual firewall and a software firewall?
What will be an ideal response?
ANSWER: A software firewall is merely an application, like Windows Firewall. It's very limited in scope and features, and only services a single client. A dedicated firewall device, such as those made by Fortinet, Cisco, or Palo Alto Networks, services an entire network (or portion of a network). It has many more features than a firewall app, and runs on its own OS. A virtual firewall emulates a hardware firewall, and is hosted in a virtualized environment. An example would be the pfSense VMware Ready Virtual Firewall Appliance by Netgate. Another example is Barracuda's NextGen Firewall F-Series, which is compatible with VMware, XenServer, KVM, and Hyper-V and also provides protection for cloud-based portions of the network. There must be a hypervisor present (usually Type 1) for a virtual firewall to exist.
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