23. TCP/IP Applications

VoIP, TV/IP, streaming video, streaming music over Internet connections are similar. They packed contents in a TCP/IP headers and then sent using transmission mess to destination node or receivers, which unpacked the TCP/IP message [remove headers & get contents], appended the contents in proper format. Finally play the contents as required.

It is not something that scares people off. Anyway TCP/IP application software providers must ensure safety or privacy to their users, i.e. don't make user data/usage became public. Encryption without master key would help.

Cellular telephony is harder as it takes care of hand off and roaming.