This document compares analog and digital communication. It discusses that analog communication uses continuous time-varying analog signals represented by sine waves, while digital communication uses discrete digital pulses represented by square waves. Digital communication offers better noise immunity, lower cost, ability to employ repeaters, implement coding, and secure data transmission through encryption. It requires higher power, bandwidth and allows lower error probability than analog communication through signal coding. The document also compares key differences between WiFi and WiMax standards for wireless communication networks. WiFi is used for local area networks with shorter range and lower speeds, while WiMax is used for metropolitan area networks with longer range and higher guaranteed quality of service but higher speeds.