Download CPT 299 B486 Internet Skills

CPT 123 [299]
Internet Skills
Overview of the Internet
Session One
Class Notes
DMWilliamson 1998
Objectives
 Describe
the Internet and its
history; and explain how to access
the Internet
 Describe the WWW in context of
hypertext and hypermedia
 Distinguish between a Web server
and a Web client
Objectives
 Distinguish
between HTTP and
HTML
 Use a browser to access the WWW
 Define a URL and give specific
examples
 Describe how to enter a URL
address in a browser
Objectives
 Define
a hyperlink
 Explain why hyperlinks within a
document appear in two different
colors
 Describe the various buttons on a
browser
 Explain how to create a bookmark
Overview of Internet
 The
internet is a
network of
networks that
connects
computers across
the country and
around the world
Overview of Internet
 Begun
in 1969 to
test the
feasibility of a
wide area
computer network
(WAN) over
which people
could share data
and messages
Overview of Internet
 Grew
out of DOD
experiment
 No central
authority
 Each computer
attached to the
network (node) is
equal to all others
Overview of Internet
 Originally
known as ARPAnet which
consisted of four computers
 Today the Internet includes millions
of computers worldwide
 Brings a worldwide library of on-line
information resources concerning a
myriad of topics to anyone who has
connectivity to the Internet
Overview of Internet
 Primary
capabilities are information
retrieval and worldwide
communication
Three Basic characteristics
 Immediacy,
 Two-way nature, and
 Global nature of medium
Internet Services
 E-mail
 Most
commonly used Internet service.
 Allows exchange of electronic messages
among users.
 Multi-platform environment
 Some mail applications allow attachments
with electronic messages
 An address of the message recipient is the
major thing one needs to send electronic
mail
Internet Services
 Recipient’s
address is usually the userid on
the system, if system permanently
attached to Internet or a user ID on an
Internet Service Provider’s (ISP) system
that holds mail until the user connects or
requests mail.
 Example format
 userid@system
 [email protected]
Internet Services
 Some
mail applications allow the
establishment of mailing lists or aliases for
groups of Internet users
 Mailing lists or group aliases are similar to
bulk mailings
 Electronic message is addressed to list and
mailer routes the message to each user on
the mailing list
 Example
 [email protected]
Internet Services
 E-mail
messages arrive at the mail server
from a remote PC or from a node on a LAN.
 The message then leaves the local mail
server and travels through a router (a
special purpose computer) that ensures each
message is sent to its correct destination.
 The mail message will pass through several
networks to get to its destination.
Internet Services
 Each
network has its own router that
determines how best to transmit the
message closer to its destination.
 The network router considers the
traffic on the network.
 A message passes from network to
network until it arrives at the
destination network.
 The message is then sent to the
recipient, who has a mailbox on that
network.
Internet Services