WiFi is a next form of the WiFi. WiMax is a high-speed broadband network technology that is designed for the corporate offices, roaming and home users.
A communications protocol used to connect computers to remote networking services including Internet service providers.
Transmission is a physical movement of information and concern issues like bit polarity, synchronization, clock etc. Communication means the meaning full exchange of information between two communication media.
Domain name system/server is used to translate the IP address into the hostname and hostname into the IP address. DNS is mostly used on the internet and the networks.
Dynamic host configuration protocol is used to assign the IP address to the networked computers and devices. DHCP is a network protocol that automatically assigns static and dynamic IP addresses from its own range.