A peice of hardware of software that blocks internet or network traffic is called a Firewall.
Firewall
A firewall is a combination of software and hardware that helps prevent unauthorized access to a system through the Internet. Modern Windows OS's feature an inbuilt firewall.
WAN Domain
As per other internet sources there is no limit on number of attempts and age.
Copying information from a computers hardware to the internet is called utility programming. This can be done quickly.
Open ie click setting.. And click on internet option
modem
No. The internet is not a component of a computer.
Most companies that offer Internet Cafe software have recommendations on hardware and network setup specific to their software.
Windows Firewall
router/modem
It can be difficult depending upon exactly what you want.However you can find specialty hardware on the internet and even refinished hardware.
This would be called the Internet Backbone