Firewall

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A firewall is just hardware system or a software application that limits outside community use of a regional or PC community by reducing or preventing network ports.

Firewalls are an excellent action for helping avoid unauthorized use of a home or company network.

The image can be an Example of the hardware firewall, the ZyXEL ZyWALL a Single Security Gateway having other security features and a Firewall.

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Martin Cooper (inventor) Inventing handheld cellular mobile phone Making world’s first handheld cellular mobile phone call. Martin “Marty” Cooper (born December 26, 1928) is an American engineer.