Summary-3

We study about World Wide Web (WWW)

WWW is very essential part in internet. This is like a web. because many user are connected to internet. and users are share their information.
WWW means three ways.
one is a collaboratively authored hypertext.
two is it is a standard.
and We study about WWW standard. ISO, IETF, RFC. but I don't know about it.
three is the www is a vast, heterogeneous network of people and machines

URL is like a zip code. this is a address.
for example
•protocol : http, ftp, mailto,
•scheme : path (server/directory/file after :)
•urn : in a specific name, a specific resource

Html is a language. To internet. like a C language.
We key in a html and computer is show it in our web browser.

Http is hypertext transfer protocol.
Http is transter hypertext and we show web browser.
Ftp is file transfer protocol. We usually Ftp to send a file.
Smtp is simple mail transfer protocol. We usally Smtp to send a mail.
Nntp is network news transfer protocol. I don't know exactly about it..