CSCE101 – Ch 2&3 September 12, 2006. Announcements Test #1 will be on Tuesday September 26 and...
-
date post
21-Dec-2015 -
Category
Documents
-
view
213 -
download
0
Transcript of CSCE101 – Ch 2&3 September 12, 2006. Announcements Test #1 will be on Tuesday September 26 and...
Announcements
• Test #1 will be on Tuesday September 26 and will cover Chapters 1,2,3.
• 1.1,1.2,1.3 grades will be posted by noon tomorrow (September 13). Check the dropbox for your grades.
• First HW will be given and returned before September 26
Email Services
• Email program vs. web-based email(Gmail, Hotmail, Yahoo!mail, Softhome, Lycos)
• Email addressing:[email protected]
Netiquette
• Avoid flaming
• Don’t SHOUT or overuse emoticons
• Be careful with humor
• Please don’t feed the trolls
Email problems
• Spam
• Spoofing
• Phishing
• A special form of virus – email worm- with or without a “payload”
Email problems (continued)
• Email privacy– Generally not encrypted
– Go through many intermediate computers– ISPs retain backups
• Cryptography applications can be used to protect messages in transit
• Even deleted email can be read – file shredders
Other Services
• Broadcasting Services– Instant Messaging– Newsgroups– Listservs– Real-time chat– Webcasting, podcasting, RSS– Blogging and the Blogosphere (escribitionists,
webcam)
Other Services (continued)
• E-commerce– B2B– B2C– C2C
• Internet, private internets, Internet2, National LambdaRail, HOPI (Hybrid Optical and Packet Structure), NSF (Global Environment for Networking Investigations)
Everything in your Web browser…
• Plug-in – can be a player or viewer. Browser is the sandbox– Privacy plug-ins (PGP)– Video plug-ins RealPlayer– Audio plug-ins
• Applets are written in Java or Visual Studio.net. Can add applets to web pages for animation, etc.
Web problems
• Pharming
• Cookies
• Adware or pop-up generators
• Browser Hijackers & Search Hijackers
Chapter 3
• Computer Software = System Software + Application Software
• System Software = Operating System + Device Drivers + Utility Programs
• Operating System Interface:
Functions of OS
• Provides User Interface
• Controls Computer Startup
(Booting)
• Manages Files
• Manages flow of instructions and data
Boot Process
• When you turn your computer on…• …the processor automatically begins…• …executing the part of the operating
system’s startup system (BIOS) located in ROM.
• These instructions help load the operating system from the hard disk into RAM (main memory), and…
• …then they pass control to the OS.