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Welcome students, I look forward to working with you this semester, check this site frequently for updates and assignments.

~  JON ~

Chapter 1 Notes

Chapter 2 Notes
Chapter 2 Notes/Images

Chapter 3 Notes
Chapter 4 Notes
Chapter 5 Notes
Chapter 6 Notes
Chapter 7 Notes
Chapter 8 Notes
Chapter 9 Notes
Port Identification

~ IST ~

A)   Internet Communication

a.    Instant Messaging

                                  i.    Real-time text-based conversations

                                ii.    Example: AOL Instant Messenger

b.    Voice over Internet Protocol (VoIP)

                                  i.    VoIP - The Internet as a means to place phone calls

                                ii.    Example: Vontage

c.    Weblogs (BLOGs)

                                  i.    are a way for anyone to post their thoughts for public viewing.   

                                ii.    Example: Blogger.com (MySpace has a Blog feature)

d.    Podcasts

                                  i.    compressed audio/video files distributed on the Internet

                                 ii.    Video Blogs (VLOGs)

1.    Many people post vlogs on youtube

e.    Webcasts and Wikis

                                  i.    Webcasts broadcast audio/visual files but are not updated

1.    Comedy central has webcasts on their website

                                 ii.    A wiki is a Web site that allows anyone to change its content

1.    Wikis provide an excellent source for collaborative writing

2.    Unlike blogs, wikis can be edited for a  “common” opinion

f.     Chat Rooms

                                  i.    Real-time text-based conversations

                                 ii.    Rooms focus on specific topics or interests

                                iii.    Identity protection

1.    By using created usernames

g.    Newsgroups

                                  i.    Online discussion forums

                                 ii.    Post and reply to messages

h.    E-mail (Electronic mail)

                                  i.    Primary means of communication on the web

                                 ii.    Example: AOL, Yahoo, Hotmail, etc       

i.      Social Networking

                                  i.    Social networking sites like MySpace.com Members share common interests

                                ii.    Members communicate by voice, chat, instant message, video, and blogs

                               iii.    Members create personalized profiles

                               iv.    Growth has been explosive


B)    Internet multimedia

a.       Multimedia:

                                                  i.      Involves forms of media and text

1.      Graphics

2.      Audio

3.      Video

b.      Streaming audio and video

c.       Plug-ins – may be necessary to view media content

                                                  i.      Such as flash, shockwave, adobe acrobat


C)    E-Commerce (Electronic commerce)

a.       3 main types

                                                  i.      Business-to-consumer (B2C)

                                                ii.      Business-to-business (B2B)

                                              iii.      Consumer-to-consumer (C2C)

b.      Secure transactions

                                                  i.      When dealing with e-commerce always try to have a secure transaction, the internet is still flooded with hacker, spyware and virus’s just waiting to get your personal information


D)    Online annoyances

a.       Spam – electronic junk mail

                                                  i.      Most email providers have spam blockers now

b.      Pop-ups – intrusive advertising

                                                  i.      Most web browsers have pop up blockers

c.       Cookies – tracking user’s browsing habits

                                                  i.      A necessary evil because they enhance the Web experience and speed up Web page loading.

d.      Spyware – programs that collect data from a user’s computer

                                                  i.      Check out Download.com and DL ad-aware to remove spyware from you pc, its free or click on this link http://dw.com.com/redir?pid=10731194&merid=69274&mfgid=69274&ltype=dl_dlnow&lop=btn&edId=3&siteId=4&oId=3120-8022_4-10731194&ontId=8022_4&dlrs=1&destUrl=http://www.download.com%2F3001-8022_4-10731194.html

e.       Malware - software that has a malicious intent

                                                  i.      Spyware

                                                ii.      Trojan horse

                                              iii.      worms

f.       Phishing and Hoaxes – Ruses to fool and maybe steal identities from users


E)     Web browsers

a.       Web browser is software installed on your computer system that allows you to locate, view, and navigate the Web.

b.      Popular browsers:

                                                  i.      Internet Explorer

                                                ii.      Netscape Navigator

c.       Web site:

                                                  i.      Collection of related Web pages

                                                ii.      First page known as Home or Index page

d.      Web page:

                                                  i.      HTML (hyper text markup language) document

1.      Text and graphics

                                                ii.      Unique address

                                              iii.      Hyperlinks will take you to a new web page


F)     URLs (Uniform Resource Locator)

a.       Protocol - identifies the means of access

                                                  i.      http://www.jontrosky.com/images/pic23.jpg

                                                ii.      Http: (hyper text transfer protocol)

                                              iii.      ftp: (file transfer protocol)


b.      Domain Name - contains the host and top-level domain

                                                  i.      The “.com”

1.      http://www.jontrosky.com/images/pic23.jpg

c.       Path - identifies the subdirectories within the Web site

                                                  i.      The path to the website

1.      http://www.jontrosky.com/images/pic23.jpg

G)    Hyperlinks

a.    Provide access to other Web pages

b.    Specially coded text or graphics


H)    Domain Names - the three-letter suffix in the domain name (such as .com or .edu) is called the top-level domain (TLD). This suffix indicates the kind of organization the host is.

a.       .com                      Can be used by anyone

b.      .edu                       Degree granting institutions

c.       .gov                       United States government

d.      .info                      Information service providers

e.       .mil                        United States military

f.       .net                        Networking organizations

g.      .org                       Organizations (often nonprofits)


I)       Search engines - a set of programs that searches the Web for specific keywords you wish to query and then returns a list of the Web sites on which those keywords are found.

a.       User keys word or phrase in search box

b.      “Spider” or “Web Crawler” program scans Web pages

c.       Results are indexed and sent to the client


J)       Web site evaluation

a.       Things to consider before using a website as a source of valid information

                                                  i.      Who is the author of the article or Web site sponsor?

                                                ii.      What audience is the site geared toward?

                                              iii.      Is the site biased?

                                              iv.      Is the information current?

                                                v.      Are links available?


K)    Internet data

a.       Client computer:

                                                  i.      Users connect to the Internet

                                                ii.      Request data and Web pages

b.      Server computers:

                                                  i.      Store Web pages and data

                                                ii.      Return the requested data to the client


L)     Internet service providers

a.       Choosing an ISP, Factors to consider:

                                                  i.      Customer service

                                                ii.      Local access numbers

                                              iii.      E-mail options

                                              iv.      Cost

                                                v.      Trial period

b.      ISP vs OSP

                                                  i.      ISP – Internet Service Provider

1.      Usually just provide user access to the Internet

                                                ii.      OSP - Online Service Provider

1.      Provide online proprietary content as well as Internet access

2.      AOL - Internet is run inside of the application

c.       Dial up

                                                  i.      Uses standard telephone line

                                                ii.      Least costly connection

                                              iii.      Requires a modem

                                              iv.      Converts analog and digital signals

                                                v.      Slowest connection speed (56Kbps)

d.      DSL – Digital Subscriber Line

                                                  i.      Faster than dial-up

                                                ii.      Upload (300Kbps  – 1.5Mbps)

                                              iii.      Download (1Mbps – 1.5Mbps)

                                              iv.      Requires special DSL modem

e.       Cable

                                                  i.      Uses TV coaxial cable

                                                ii.      Fast connection speed (500Kbps – 4Mbps)

                                              iii.      Speed depends on number of users

                                              iv.      Not available in all areas

                                                v.      Requires a cable modem

f.     Satellite

                                                  i.      Uses a satellite dish and coaxial cable

                                                ii.      Download speed 500 kbps

                                              iii.      Upload speed 100 kbps

                                              iv.      Signal is affected by location and weather


Connection Option

Maximum  Upload Data Transfer Rate (approximate)

Maximum  Download Data Transfer Rate (approximate)


56 Kbps

56 Kbps


300 Kbps

1 Mbps


1.5 Mbps

1.5 Mbps


500 Kbps

4 Mbps


100 Kbps

500 Kbps


M)   Internet basics

N)    Origin of the Internet

a.       ARPANET: (Advanced Research Projects Agency Network)

                                                  i.      Funded by the U.S. government in the 1960s

                                                ii.      Allowed computers at leading universities and research organizations to communicate with each other over great distances

b.      The Web

                                                  i.      The Web is a part of the Internet distinguished by:

1.      common communication protocols TCP/IP and HTML

                                                ii.      special links (called hyperlinks)

                                              iii.      Web invented in 1989 by Tim Berners-Lee

                                              iv.      1993, National Center for Supercomputing Applications releases the Mosaic browser

                                                v.      Developers of Mosaic release Netscape (1994)

                                              vi.      Netscape is beginning of Web’s major growth

c.       The Web vs. the Internet

                                                  i.      Internet – part of the system that is primarily hardware infrastructure (telecommunications, routers, servers, disk drives, etcetera)

                                                ii.      Web – part of the system that contains intellectual property in many multimedia formats (test files, graphic files, sound files, video files, etc.)

O)    Future of the Internet

a.       Large Scale Networking (LSN):

                                                  i.      Research and development of cutting-edge networking and wireless technologies

b.      Internet2:

                                                  i.      Project sponsored by universities, government, and industry to develop new Internet technologies

                                                ii.      Internet2 backbone supports transmission speeds of 9.6 Gbps