Notes on Internet
Internet
is a network of networks that connects computers anywhere in the world.
The
World Wide Web (www or simply, the Web) is a very large
subset of the Internet, consisting of those computers that store a special
type of document known as a Web Page or HTML document.
HTML
(Hypertext Markup Language) is a special language
to develop web pages. With Word 2000, you can generate web pages with ease.
A
hyperlink is a reference to another web page, probably stored on a
different computer. Any internet path(that is, any text that begins with
http:// or www) or e-mail address will be automatically converted to a
hyperlink by Word when you press the spacebar. Examples:
http://www.bilkent.edu.tr
www.pagina.de/ozlem
ozgu@bilkent.edu.tr
HTTP
stands for hypertext transfer protocol which is used by WWW services to
retrieve documents quickly.
ftp
stands for file transfer protocol and is used to download (move a file
from a remote computer to your local computer)
or upload (move a file from your local computer to a remote
computer) files on internet.
URL
stands for universal (uniform) resource locator, a means of specifying the
location of information on the Internet for WWW clients.
TCP/IP
stands for Transfer Control Protocol/Internet Protocol and is the set of
networking rules on the internet. Every computer on the web has a preset IP
address that identifies it such as 195.142.99.1 We work with Domain
Names that correspond to those numbers generally. For instance,
bcc.bilkent.edu.tr.
DNS
stands for Domain Name System which is a system that translates between
Internet IP address and Internet hostnames.
Email
is an electronic message delivered from one computer user to another. Short
for electronic mail.
Email
address
is an address used to send email to a user on the Internet, consisting of the
username and hostname. An Internet email address is usually in the form
username@domainname. For instance your email addresses are in the format
username@ug.bilkent.edu.tr.
HTML
stands for Hypertext Mark-up Language, the formatting language/protocol used
to define various text styles in a hypertext document, including emphasis and
bulleted lists.
Hypertext is
an online document that has words or graphics containing links to other
documents. Usually, selecting the
link area.
LAN
stands for Local Area Network is a network of computers that is usually
limited to a small physical area. Such as a building.
Telnet
is a program that allows remote logon to another computer. For instance you
can use telnet to logon to one of the Unix servers on the Bilkent LAN.
Client
is a user of a service. Also often refers to a piece of software that gets
information from a server. Additionally, client refers to an application that
makes a request of a service on a remote computer.
Server
is a provider of service; a computer that runs services. It also refers to a
piece of hardware or software that provides access to information requested
from it.
Introduction to HTML
HTML code specifies the logical structure of
hypertext (hypermedia) documents, and is machine-independent. The resulting
view of the document on a user's screen is identified by that user's web
browser.
HTML code is composed of markup tags. A
markup tag has the following format:
<tag name options
other specifications> displayed name </tag
name>
, or
<tag name options>
HTML code
is not case sensitive, except for the folder/file names quoted! Also spaces
and line breaks are not important except for the <PRE> markup tag.
Basic HTML source structure
<HTML>
<HEAD>
</HEAD>
<BODY>.
.
.
.
</BODY>
</HTML>