What is Airport extreme and what is it used for?

Apple Airport extreme 2TB has Wifi i know that but why do people use it as it needs a DSL modem separately

What is a traceroute? What is it used for? What protocol does it use? What is a hop count? What does it measure? What does the phrase the "time to live" signify here? What is its relevance in a network and why does it have to be monitored? What is next hop?

Hello, I have a A. tech USB keyboard. I have bought it three days ago. Since I bought it for my work, I cannot set it up with windows XP. Every time I try to install it, the Windows keep trying and trying to find the driver into the windows. It never stops. Why is this happening?

Hi, I am an user of Firefox. Recently I am having a problem with it. Firefox says, it has encountered a problem and closing itself. The message says, Firefox.exe has encountered a problem and needs to close. We are sorry for this inconvenience. I am using Firefox 35.0 beta version with Windows 7. Can anyone help me out? 

Hello, I am using a webcam C250. I have downloaded the software of this webcam three or four times as far as I can remember. Every time I try to Install it or run it on my windows XP, a black screen appears and then a message comes forward. It says it has encountered a problem and needs to close. Can anyone help me please?

Hi, I am using Brother printer Smart J4310 printer for last few days. Suddenly I was in need to use use Windows 7 - 64 bit for my personal computer. The problem I am facing is my printer's driver that was given with the printer when I bought it, is not working properly. Any solution please?

Hello, I am an user of Samsung TB portable hard disk drive. My removable hard dive is transferring data 10-15 Mb/sec. It has USB 3.0 data transfer speed by product. My PC's main board is USB 3.0 supported and is fully functional with other portable devices except my portable device. What should be the problem?