COMPUTER SECURITY RISK AND SECURITY MEASURE

DEFINITION OF COMPUTER SECURITY RISK:

Any event or action that ould cause a loss of or damage to computer hardware, software, data, information or processing capability.

7 basic categories of cybercrime.

1.hacker

2.cracker

3.script kiddie

4.corporate spies

5.unethical employees

6.cyber extortionist

7.cyberterrorist

NETIQUETTE AND ETHICS

DEFINITION OF NETIQUETTE
-the code of of acceptable behaviours users should follow while on the internet or online or cyberspace.

DEFINITION OF COMPUTER ETHICS

-The moral guidelines that govern the use of computers, mobile devices and information systems.

AREAS OF COMPUTER ETHICS

1.Information accuracy-do not assume all the information on the Web is correct.

2.Green computing

3.Codes of conduct

4.Intellectual property

5.Information privacy

 

TYPES OF WEBSITE

1.PORTAL
    A web site that offers variety of internet services from single, convenient location.
  Most portals offers these free services:
-Search engine
-News
-Sports and weather
-Web publishing
-Reference tools such as yellow pages, maps, shopping, and e-mail and other communication services.

EXAMPLES : 1.AltaVista

                        2.AOL

                        3.GO.com 

                        4.Lycos

                        5.Yahoo!

2.BLOG
    An informal web site consisting of time-stamped articles or posts in a diary or journal format, usually listed in reverse chronological order.

TYPES OF BLOG	DESCRIPTION
vlog(a video blog)	a blog that contains video clips
microblog	allows users to publish short messages
blogger	blog author
vlogger	vlog author
blogosphere	the world wide collection of blogs
vlogosphere	all vlogs worldwide

3.WIKI
A collaborative web site that allows users to create,add to,modify or delete the web site content via their web browser.

examples : 1.wikipedia
                   2.wikihow
                   3.foodista


4.Online Social Network
  Encourages members in its online community to share their interests, ideas, stories, photos, music and videos with other registered users.
Examples : Facebook,Myspace

5.BUSINESS
 Contains content that promotes or sells products or services.
Examples : Pearl Haya Gallery, Anakku brand , Kraft Brands

INTERNET SERVICE

TYPE OF INTERNET SERVICE :

1.World Wide Web(www):
     -Consists of a worldwide collection of electronic documents.

2.E-mail :
     -not real time
     -Consist simple text (attachment such as graphics, audio/ video clips)

3.Instant Messaging :
     -Real-time Internet communication
     -Exchange messages or file or join private chat.
Eg: Yahoo Messenger

4.Voice over Internet Protocol(VoIP) :
     -Enables users to speak to other users over the internet.

5.Message Board :
     -Easier to use.
     -Does not require a newsreader.

6.File Transfer Protocol(FTP) :
     -Software use to upload and download file on the Internet.

WEB BROWSER, WEB ADDRESS, WEB SEARCHING AND WEB PAGE NAVIGATION

WEB BROWSER

•A Web browser, or browser, is application software that allows users to access and view Web pages.

•The purpose of a web browser is to bring information resources to the user.

EXAMPLES:

HOW A WEB BROWSER DISPLAYS A HOME PAGE?

WEB ADDRESS

•A Web page has a unique address called a URL (Uniform Resource Locator) or Web address

•Web address consists of :

- Protocol

- Domain name

 -Path

- Web page name

EXAMPLES OF WEB ADDRESS

- www.facebook.com

- https://www.moe.gov.my/bmkpm/

WEB SEARCHING

A primary reason that people use the Web is to search for specific

information, including text , pictures , music and video.

Two types of search tools:

SEARCH ENGINE	SUBJECT DIRECTORY
(keyword search)	(directory search)
finds information related to a specific topic	classifies Web pages in an organized set of categories

example of search engine:
-Lycos
-Infoseek
-Excite
-Webcrawler

examples of subject directory:
-Altavista
-Yahoo!
-Google
-Excite

WEB PAGE NAVIGATION

-most web pages contain hypertext or hypermedia links

HYPERTEXT	HYPERMEDIA
links in text-based document	combine text-based links with graphic,audio and video links

TYPE OF INTERNET CONNECTION

DIRECT CONNECTION/BROADBAND INTERNET CONNECTION

1.DSL

-Broadband delivered over telephone lines

-Must be less than 3 miles from a switching station
-Transmits over telephone lines but does not tie up the line

-Example :- Streamyx without WiFi

2.FTTP

-Also known as Broadband over Fiber (BoF)
-Delivers over fiber-optic cabling all the way to the building
-Provide high-speed Internet access to house and business users.

3.Fixed wireless
  -Uses radio transmission towers rather than satellites
-Provides high-speed Internet connections using a dish-shaped antenna to communicate via radio signals.

4.Cellular Radio Network
 -Also known as Mobile wireless
-Access via mobile phone or device
-Offers high-speed Internet connections to devices with built-in compatible technology or computers with wireless modems.
-Example provider:- Celcom, Maxis, DiGi

5.Cable Internet Services
-Cable modem: Most widely used home broadband connection
-Provides high-speed Internet access through    the cable television network via a cable modem.

6.satellite internet service

•Broadband option for rural areas
•A satellite dish communicates with a satellite modem.

7.Wi-Fi
  -Data is transmitted through radio waves
 -Public wireless networks

-         -Both free and fee-based are available

          -Currently Wi-Fi for short range, but WiMAX may soon be an option

         -Provide high-speed Internet connections to compatible or properly equipped wireless computers and device.

•Example : Streamyx with WiFi                         

INTERNET SERVICE PROVIDER

An Internet service provider (ISP) is an organization that provides access to the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.

Internet services typically provided by ISPs include Internet access, Internet transit, domain nameregistration, web hosting, Usenet service and colocation.

                                                                                                                                                                                          

THE INTERNET ADDRESS

An Internet Protocol address (IP address) is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing.

DIAL UP CONNECTION

       

                                                                     

TWO TYPE OF DIAL UP CONNECTION

-Conventional dial up

  *PC has to dial via phone line to dial-up

-ISDN(Intergrated Service Digital Network)

  *Typically uses two phone lines to transfer data
   *ISDN requires a special ISDN modem

ADVANTAGES	DISADVANTAGES
include inexpensive hardware	slow connection speed
ease of set up and use	inconvenience
provide the user with convenience of using account	telephone line will be tied up while accesing Internet