Role of firewall in computer security

A firewall is a network securing hardware or software. Its main purpose is to check the inflow and outflow network traffic using an analysis of data packets and according to the set rules, it permits or rejects access to the computer. It bridges an internal network of the computer and an external source of network e.g. internet which is taken as insecure and cannot be trusted. For most of the private computers there is internal software that protects it from the external threats of the public internet. If you are interested in McAfee Internet Security, please don’t forget a McAfee promo code:

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