The term WiFi WiFiis the abbreviation of Wireless Fidelity. It designates a system of connection to Internet wireless. Internet access is through the transmission of radio waves. It also allows you to connect several equipment to each other (a printer to a computer for example).
You can use the WiFi WiFion computers, tablets PCs, some printers and some mobile phones, known as "WiFi".
To simplify, it can be said that the internet debit designates the speed of your fixed internet connection(internet box) or your mobile connection (4G network). The faster the speed, the less time you take to download a file, update your apps, or display a website. It is also your internet flow that determines the quality of TV channels on your box and streaming videos.
To be more accurate, the flow refers to the quantity of information that can flow on your line at a time T. It is therefore measured by reporting the volume of data, expressed in bits, to the time required to transit to your devices. So we are talking about kb/s and now, more generally, in Megabits per second (Mb/s) with the generalization of broadband and very broadband. See in Gigabits per second (Gb/s) for ultra-fast connections via the fiber optic network. The following video illustrates quite simply the difference between a flow rate less than 1 Mbps and a flow rate of 1 Gb/s: