What is a Firewall?

A firewall fulfills the function of protecting networks and preventing unauthorized access. This can be presented as a hardware device , Software, or a combination of both.

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The firewall is able to prevent malicious access to the internal network of a computer, such as in the case of websites…

lFirewal is basically a network device that is  used to block certain types of network traffic. Firewall forms a barrier between a trusted and an untrusted network. There are various types of firewall security like packet filtering firewall, stateful firewall. Know all types of Firewall Security at http://iberrywifisecurity.blogspot.in/2018/01/guide-to-various-types-of-firewall.html