cpt 123 [299] internet skills overview of the internet session one class notes dmwilliamson 1998

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CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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Page 1: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

CPT 123 [299] Internet Skills

Overview of the Internet

Session OneClass Notes

DMWilliamson 1998

Page 2: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998
Page 3: 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

Page 4: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Objectives

Distinguish between HTTP and HTML

Use a browser to access the WWWDefine a URL and give specific

examplesDescribe how to enter a URL

address in a browser

Page 5: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Objectives

Define a hyperlinkExplain why hyperlinks within a

document appear in two different colors

Describe the various buttons on a browser

Explain how to create a bookmark

Page 6: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998
Page 7: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Overview of Internet

The internet is a network of networks that connects computers across the country and around the world

Page 8: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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

Page 9: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Overview of Internet

Grew out of DOD experiment

No central authority

Each computer attached to the network (node) is equal to all others

Page 10: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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

Page 11: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Overview of Internet

Primary capabilities are information retrieval and worldwide communicationThree Basic characteristics

Immediacy, Two-way nature, and Global nature of medium

Page 12: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Internet Services

E-mailMost commonly used Internet service.Allows exchange of electronic messages

among users.Multi-platform environmentSome mail applications allow attachments

with electronic messagesAn address of the message recipient is the

major thing one needs to send electronic mail

Page 13: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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 formatuserid@[email protected]

Page 14: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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

[email protected]

Page 15: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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.

Page 16: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

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.

Page 17: CPT 123 [299] Internet Skills Overview of the Internet Session One Class Notes DMWilliamson 1998

Internet Services