1. COMPUTER BASICS METC 106

2. The Internet Global group of interconnected networks Originated in 1969 – Department of Defense ARPANet Only text, no graphics until 1989 – World Wide Web - WWW Copyright @ 2009 Pearson Prentice Hall. All right reserved. 2

3. The WWW World Wide Web Subset of the Internet that displays graphics Hyperlinks (links) – Connections to other Web pages Viewed with graphical browser No commercial interest in the Internet until the advent of the WWW Copyright @ 2009 Pearson Prentice Hall. All right reserved. 3

4. Web Addresses Anyone can have a Web page – Web authoring tool (software) HTML, JavaScript, or Java – Internet server Physically hosts the Web page Every Web page has a unique Uniform Resource Locator (URL) Copyright @ 2009 Pearson Prentice Hall. All right reserved. 4

5. URL Uniform Resource Locator – String of unique characters Copyright @ 2009 Pearson Prentice Hall. All right reserved. 5 http://www.sou.edu/Admissions/index.html Hypertext Transfer Protocol - Internet communication protocol Domain name - address of the Internet server where the Web page resides Type of organization Folder name Filename with extension

6. Downloading or Uploading Downloading – Process of obtaining a file from another computer – Receive a copy of the file – Success depends on Having enough disk space on your computer File must be available for unrestricted copying Uploading – Process of placing a file onto another computer – Give a copy of the file Copyright @ 2009 Pearson Prentice Hall. All right reserved. 6

7. What is E-mail? A typed message Sent to several people at the same time Forwarded to one or more people Delivered immediately – Recipients can respond immediately Style is short and informal and is easy to create Add files as attachments Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 7

8. E-Mail Servers Computers dedicated to managing e-mail Must have an e-mail account Mail arrives at a destination mail server – Held in an electronic mailbox until you retrieve it Sent e-mail goes to a mail server that forwards it to the destination Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 8

9. Windows Mail and Outlook Express E-mail client software Outlook – Windows XP Windows Mail – Vista – Instant searches – Spam filters – Phishing filters Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 9

10. E-Mail Risks E-mail has security and privacy risks Computer viruses can be sent via e-mail – Can damage or annoy computer users Phishing tricks you into giving out personal data Spam is unsolicited e-mail or junk mail Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 10

11. Spam E-mail junk mail – unsolicited and unwanted Set filters in the e-mail client to delete it Do not respond or reply – Confirms the e-mail address is valid and used Delete it ISP may filter out spam Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 11

12. Viruses Spread via e-mail attachments – Sent along with the e-mail – E-mail asks you to open attachment - Don’t – Only open attachments from a trusted source Antivirus software helps prevent viruses Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 12

13. Phishing E-mail appears to be from legitimate entity – IRS – Bank – Police Asks user to either – Visit a web site or – Send personal information Web site can download virus Leads to Identity theft Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 13

14. Sending E-Mail All e-mail has two parts – The header Name and e-mail address of the recipient Wrong address causes a bounce – Returned e-mail – The body Message content Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 14

15. Sending E-Mail (continued) To: – Can send to more than one recipient Use comma or semicolon between names CC: – Carbon copy (without carbon paper) BCC: – Blind carbon copy – Primary recipient can’t see addresses in BCC: Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 15

16. Netiquette Some basic rules of Internet politeness – http://www.albion.com/netiquette/corerules.htm l http://www.albion.com/netiquette/corerules.htm l – Spell correctly – Avoid all capital letters (shouting) – Keep e-mail short and to the point – Never put confidential information in e-mail – Be clear in the Subject line Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 16

17. Netiquette (continued) – Keep e-mail addresses confidential – Avoid flaming, excessive humor, and sarcasm – Avoid chain letters – Always include your name and address in message – Don’t use emoticons for formal messages Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 17

18. Attachments A file attached to a message Adding an attachment to share – Photographs – Documents – Songs View with caution – Due to virus possibilities – Scan prior to viewing – Be wary of unsolicited e-mails with attachments Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 18

19. Microsoft Windows Update Windows is the most common OS – Does not mean error free or secure Microsoft provides patches or updates monthly – Critical updates fix serious security threats Service Pack – A large group of patches – Fixes large scale problems Both Service Pack and Patches are free Updates can be automatically loaded and installed on computer from the Internet Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 19

20. Risks: Viruses Program written to either annoy or destroy data – Maliciously written software – Travels from computer to computer – Infects via e-mail attachments or program downloads Antivirus software – Detects viruses – Quarantines viruses – Updated automatically Can wipe out entire hard disk and/or make data unreadable Copyright @ 2009 Pearson Prentice Hall. All rights reserved. 20