A modem is a tiny box or device that sits between your computer and your wall or cable box, depending on the type of Internet connection. It connects the computer or router to the broadband network.
If one is using dial-up or DSL then the modem will connect to the wall and if one is using cable then it'll hook up to the cable box or available co-axial cable.
It is a hardware device that converts data from a digital format, intended for communication directly between devices with specialized wiring, into one suitable for the transmission such as telephone lines or radios.
Device
Function
Firewall
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Memory Card
A memory card is an electronic data storage device used for storing digital information, typically using flash memory.
Jump Drive
A jump drive is a plug and play portable storage device and also known as USB Flash Drive, pen drive, key chain drive.