telnet fun....echoed characters happen
also, pogram is NOT A FUCKING WORD
socket programming with tcp
client must contact server - server proc must be running when client tries to connect

gethostbyname() <--gets IP

apps communicating, distributed procs, running in hosts in userspace
exchange messages to implement app
application layer protocols
	one piece of an app
	define messages exchanged by apps and actions taken
	use comm services provided by lower layer protocols
	
https status response codes
	200 ok
	301 moved perm
	400 bad req
	404 not found
	505 http version not supported

ftp has response codes, too!
MY GOD KILL ME NOW

3 components to email
	user agent
	mail server
	smtp

mail server demo