Wi-Fi is the name of a standard wireless networking technology that makes use of radio waves to provide wireless high speed internet and network connections. Though strictly speaking it is not a technical term, however it is defined as “wireless local area network products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards”.

Netbook is a special type of economical, small and lightweight laptop computers. It was launched in 2007 as tinier version of notebook computers. It is available in the market feature smaller monitors and keyboards and offer lesser computing power.

When it comes to computer security the Trojan horse is a formidable virus that attaches itself to normal files, breaches security and enters the computer whenever the user downloads anything from the internet. Its presence is completely hidden from the user, as it functions invisibly to infect the files one by one.