Basic Technology

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Basic Technology

• Miklos A. Vasarhelyi
• Rutgers University
• ATT Laboratories

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Merging TC IT at the home
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Comunications

• Type of lines
• pots (twisted pairs) - traditionally carries
  from 2.4 to 56 Kb
• DSL (xdsl)
• ISDN
• T1 ( 24 pots - aprox. 1.5Mb)
• T3 (28 x T1 ' aprox. 45 Mb)
• coaxial (CATV)

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Comunications (II)

• analógic vs. digital
• copper x optical fiber x coaxial
• wireless
• cellular
• fixed wireless
• low trajectory satellites (Iridium from Motorola)
• backboneT3
• 650 Mbs (OC3), 2.4 Gbs (OC12)

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Communications (III)

• packet switching vs line switching
• switches (4DSS, 5ESS) vs routers(Cisco)
• Transmission Control Protocol (TCP)
• Internet Protocol (IP)
• TCP /IP (ubiquity, open standard)
• IP addresses
• Domain names (Internic)

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Internet elements
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When you connect on the Net
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When you connect on the Net
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Definitions

• A hit
• A page
• A visit
• A visitor
• Identifying visitors
• the ppp/slip -- firewall --- IP identification
  issue

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Corporate Internet Access
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Internet and User Features

• Dos
• e-mail, ftp, lynx, net-news
• Windows
• winsock
• WWW browser (Netscape, Explorer, Mosaic)
• Incorporation Features
• audio (real audio)
• video

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Internet and User Features (II)

• Windows (cont.)
• Incorporating features
• encryption
• digital signatures and certificates
• public key / private key
• e-commerce features
• progressive complexity of browsers
• secure sites