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“Computer firewall” is software which is developed on the basis of operating system. It was mainly designed for control the access to unauthorized content on a computer. It works under some rules and instructions. According to those rules it decides whether to block or allow access.

Computer firewall is an OS based software designed to control the access to unauthorized content on a network or a computer system. It works with predefined set of rules, according to which it decides whether to block or allow access.

iPhone is an internet ready multimedia smart phone manufactured and marketed by Apple Inc. The highlight of this unique phone model is its touch screen, integrated with multi touch options. The lack of a physical input device like keyboard is substituted with a virtual keyboard rendering, at times of necessity.

The “iPhone” is an internet connected multimedia smart touch screen phone designed by Apple Inc. It is a multi-touch screen and works with multi-functional touch options. Apple announced the” iPhone “on January 9, 2007 and launched on June 29, 2007. Due to lack of physical input hard ware device like key board, the multi-touch screen renders a virtual keyboard when necessary.