This document provides information on wireless network and communication. It includes assignments on various modulation techniques, frequency assignments, analog modulation and frequency modulation waveforms, 16 QAM constellation diagram, error detection process for cyclic redundancy check (CRC), frame check sequence computation, transmitted signal using direct sequence spread spectrum, infrastructure and ad hoc modes in WLAN, comparison of TCP and OSI protocols for wired and wireless LANs, and the appropriateness of square and circle shapes cells in cellular communications.