Telecommunications & The Internet Basic Telecom Model

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Network-Internet

Public Networks AOL

1991 AOL for DOS
1993 AOL for Windows
1997 bought CompuServe
1999 10 Million users
Estimated to have distributed over 1 Billion discs of over 1,000 different disk/CD styles

Internet Statistics

http://www.internetworldstats.com/stats.htm

User Counts, updated daily

http://whois.sc/internet-statistics/

Domain Counts, updated daily

The Keys to Internet Growth

1991 WAIS and Gopher provide Internet search and navigation
1992 WWW hyperlink software released
1992 NSF relaxes its restriction on commercial Internet traffic
1992+ explosive growth in usage

Internet Capabilities

Communications

E-mail
Usenet
Chatting
Telnet

Information Retrieval

Gopher
Archie
WAIS
FTP

http://sunland.gsfc.nasa.gov/info/guide/Using_archie_Today.html

World Wide Web

Set of standards for storing, retrieving, formatting, and displaying information using a client/server architecture
Hypertext markup Language (HTML)
browser
search engines

Putting It All Together

AT&T

Level 3

Centurylink

I29

Cable One

Consumer

Consumer

Consumer

Some Upper Tier Providers

AT&T
Bell Atlantic
Bell South
Cable and Wireless
Cable One
GTE

IBM
MCI
Pacific Bell
QUEST
Sprint
US West

Tier 1 Networks

The largest backbones on the Internet:
Centurylink, Telecom Italia, Verizon, Sprint, TeliaSonera International, NTT Communications, Deutsche Telekom, Level 3, AT&T
These top branded backbones only trade peering traffic among themselves.

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