Q1: The system that allows the user to make telephone communication or voice communication through the internet.
Q2: The sharpness of the image on the monitor screen, determined by the number of pixels that make up the image.
Q3: A company that provides the internet facility.
Q4: A service of the internet that allows to send or receive instant message.
Q5: A system that allows the user to make voice communication through internet using some additional hardware and software.
