Transcript HTML1 - University of Missouri

Origins of the Internet
The Internet was started as a research project sponsored
by the Advanced Research Projects Agency (ARPA)
within the U.S. Dept. of Defense in the late 1960s
Called ARPAnet, this distributed network was conceived
to support university and military research
In the 1980s the National Science Foundation (NSF) used
this same technology to create the NSFnet, which was
intended to support education and research.
In the mid 1980s the Internet was commercialized and dot
coms were created. Much traffic on the Internet is now
Web-based and commercial in nature.
What is the Internet?
–
The Internet is a constellation of
communicating devices supported by a
common communications protocol (TCP/IP),
offering the following capabilities:
–
SMTP – Simple Mail Transport Protocol (aka “Email”)
telnet -- the ability to connect to a remote host and interact as if one
where onsite
FTP – File Transfer Protocol, the ability to connect to a remote host and
upload/download a file
–
–
The World Wide Web is
A software application, most often
running on the Internet (but not required
to be) using a client – server protocol for
communications.
 When run on the Internet, these apps are
supported by SMTP, telnet, and FTP

Hyperlinks !!!
Hyperlinks (the ability to move from one
source to another in a webbed environment)
are the primary reason why the Web is so
popular (and navigable).
 Hyperlinks are often combinations of the
telnet and FTP functions within TCP/IP
(the so-called “Internet protocol”)

So what is “client-server”?
Client-server itself is a software
application that supports connectivity
and functionality between users (running
“client software applications”) and hosts,
or servers running server-side software.
 Sometimes we call this design philosophy
an “Open Systems” design, since it
supports multiple H/S platforms.

The Web (or “WWW”) enables these
functions:
 Text
and graphic presentation to the
end user
 Hyperlinks to related materials
created by a web page author
What is HTML?
The authoring language of the Web is
currently HTML, which stands for
HyperText Markup Language.
 Future versions of the Web are likely to
be based on XML, and eXtensible
Markup Language

HTML does not support such things as:
 Sound,
motion, video
 User interactions
 Counters and market information

But these applications can be
accomplished through external
programming tools that run “under”
HTML.