Transcript Internet 1

Internet – Part I
What is Internet?
Internet is a global
computer network of
inter-connected networks.
Internet
All computers connected to the
internet must communicate
with each other using set of
rules (protocols) called TCP/IP
(Transmission Control
Protocol/ Internet Protocol).
Internet Activities
Send and receive electronic
messages (e-mail).
 Transfer data files to and
from computers around the
world (File Transfer
Protocol [FTP])

Internet Activities

View corporate or
personal documents
containing graphical
hypertext content
(World Wide Web).
Internet Activities

Share point-of-view on
specific subjects with other
online groups, (Usenet
news-groups - Network
News Transfer Protocol).
Internet Addressing

Each computer directly
linked to the Internet
must obtain a unique
address so that it can be
located.
Internet Addressing

A computer’s internet
protocol (IP) address is a
four-part series of numbers
separated by periods. For
example 198.137.241.30
Internet Addressing

Because it is difficult to
remember a long series of
numbers, a name
addressing system was
developed, called domain
name system (DNS), e.g.
Whitehouse.gov
Internet Addressing

The DNS is a world-wide
system of databases that
maps domain names with
their corresponding IP
address.
Connection Access

To obtain an Internet
domain name, it is
necessary to register with
(and pay) a special Internet
committee, Internet Service
Provider (ISP)
Domain Names

When an organization or
company establishes a link to
the Internet either as a highspeed, dedicated pointer itself
or as an account through a
dedicated provider, a domain
name must be chosen.
Domain Name
The name is unique and
comprised of these parts:
ServerName.OrgName.OrgType.ContryName
Country Name:
.jo: Jordan.
.uk: United Kingdom.
Organization Type:
.com: commercial organization.
.edu: education.
.int: international organization.
Organization Type:
.mil: military organizations.
.org: nonprofit and research
organizations.
.net: network and service
operations.
Organization Name:

Company or organization
name: up to 22 alphanumeric
characters and cannot include
spaces (although underscore
can be used).
Hostname Name:

Host computer
This entire domain is part of
LAN (Local Area Network)
connected to the internet.
The network server is
connected to the Internet.
Each of the computers on
the network gain their
access to the Internet
through the network
server.
Electronic Mail (email)
Electronic mail, or email, is a
simple tool for exchanging
messages between
individuals or among larger
audience.
Electronic Mail

Email messages travel very
quickly and inexpensively.
The delivery of messages
from one part of a country
to another may take
minutes.
Electronic Mail

Once a message has
been received, it can be
saved, printed, edited,
forwarded to another
user, or deleted.
Electronic Mail

Email is becoming one
of the most widely used
services on the Internet
Electronic Mail
1. Fast
2. Can save messages for future
reference.
3. Free of charge.

Get a free web-based email
account through
Hotmail
Email Address
An email address has two
parts:
1. Username;
2. Domain Name.
Example
[email protected]
Email Message’s Parts
An email message must
have at least two parts:
1. Header;
2. Body.
Header
The Header contains
information about the
message: sender,
receiver, date and
subject.
Message Body
The body contains the
actual message being
sent.
Message Signature

Sometimes, an email
message contains a third
part, called the signature.
It is optional, and usually
identifies or provides
information about the
message’s sender.
Which email Program to use?
1. On UNIX you may use
Pine or Mailx
2. Netscape’s mail through
Netscape Navigator.