Difference b/w Hardware & Software based firewall

How can i differenciate the Hardware & Software based firewall?
What are the key advantages of Hardware based firewall?
what are the limitation of software based firewall?
Regards,

Hi Syed
Software based firewalls are the firewalls which are provided by software for eg you install an antivirus program Mcafee the firewall which will be provided by Mcafee is software based firewall. Windows inbuilt firewall is another example of software based firewall.
Hardware based firewall are those where we require a different hardware to perform packet check. For eg Cisco FWSM,PIX,Fortigate are all example of hardware based firewall.
Limitation of Software based firewall:
Software-based firewalls aren't the ultimate security tool, however. A personal firewall can't prevent viruses from entering your system through legitimate sources such as a web browser or through email. An anti-virus program with constantly updated virus signatures must always be included in an overall security strategy.
Personal firewalls also can't protect an entire network unless the software-based firewall is installed on every computer. In medium and large-scale environments, software-based firewalls must be managed properly to ensure optimal security coverage.
Regards,
Anim Saxena
Technical Community Manager - Network Security
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