... reliable ARQ)frame type(RTS, CTS, ACK, data) 6: Wireless and Mobile Networks 6-2Chapter 6: Wireless and Mobile NetworksBackground: ❒# wireless (mobile) phone subscribers now exceeds # wired ... functions on behalf of mobile, when mobile is remotewide area networkcorrespondent 6: Wireless and Mobile Networks 6-6Elements of a wireless networknetwork infrastructure wireless link❒typically ... 6: Wireless and Mobile Networks 6-4Elements of a wireless networknetwork infrastructure wireless hosts❒laptop, PDA, IP phone❒run applications❒may be stationary (non- mobile) or mobile ❍wireless...