Definition - What does Nonrepudiation mean? Nonrepudiation is a method of guaranteeing message transmission between parties via digital signature and/or encryption. It is one of the five pillars of information assurance (IA). The other four are availability, integrity, confidentiality and authentication. Nonrepudiation is often used for digital contracts, signatures and email messages.
Definition - What does Cellular Network mean? A cellular network is a radio network distributed over land through cells where each cell includes a fixed location transceiver known as base station. These cells together provide radio coverage over larger geographical areas.
Cellular refers to the ability to connect to cellular towers for data transmission and you have ability to connect to the Internet even when you are not near a WiFi network. With a cellular iPad, you can be out in a car riding down the highway and still have Internet connectivity where as with WiFi only, you have to be within the range of a WiFi network that you can connect to in order to have Internet access.