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What is firewall and explain software based firewall?

In: Computer Viruses [Edit categories]

Relevant answers:

Explain what a firewall is and why it is necessary?
Because it is!
Can you install a firewall software with an antivirus software?
Sure you can! Some antivirus providers even provide firewall with them. If you want a stand-alone firewall, then I recommend going for COMODO Personal Firewall.
What does a business firewall software do?
A business firewall software allows your company to be protected from hackers, viruses and trojans. This is essential for businesses because it gives security.
Comodo firewall or Norton firewall?
Neither. Use AVG firewall. It's even better than the other two or the Windows firewall.
What is firewall and types of firewall?
Firewall define by its name only firewall means the wall of fire. firewall act as a security gateway between two network(usually between trusted and untrusted network) . Basically firewalls depends...