What is Firewall? I saw in one website Firewall is software and hardware and combination of software and hardware.It is used to protect user information or avoiding crackers.how it is?Whether it is hardware?If not then why the images are like that?(a wall ).Please help me by answering this question.Advance thanks.
4 3684How the telecommunicaton is working?I have heared that one control will be there for asia countries for other countries there will be another,what is that how they work?
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