DC014 Lecture Note & Tutorial

3.1.3 Differences between http and https















INDEX HTTP HTTPS





1 It is not secure and It is secure and reliable




unreliable





2 It is subject to main-in- It is designed to withstand



the-middle and such attack and is considered




eavesdropping attacks secure againts such as




attacks





3 HTTP Works at HTTPS works at Transport



Application Layer Layer





4 Encryption is absent Encryption is present





5 Does not require any Needs SSL Certificates




certificates

3.1 Internet principles of operation




























• Learning Outcomes:








3.1.4 Describe Internet Protocol (IP) address,





Uniform Resource Locator (URL).

3.1 Internet principles of operation




























• Learning Outcomes:








3.1.4 Describe Internet Protocol (IP) address,





Uniform Resource Locator (URL).

3.1 Internet principles of operation






3.1.4 IP Address, Uniform Resource Locator (URL)










• IP address is a sequence of numbers that






uniquely identifies the location of each





computer or devices connected to the






internet or any other network.







• IP address is used as an address to send data





and information to a specific computer or






device on the Internet.

3.1 Internet principles of operation






3.1.4 IP Address, Uniform Resource Locator (URL)










• IP address is a sequence of numbers that






uniquely identifies the location of each





computer or devices connected to the






internet or any other network.







• IP address is used as an address to send data





and information to a specific computer or






device on the Internet.

Internet Protocol address or IP address.















• Example :








IPv4 IPv6







10.20.20.16 2001:0db8:0a0b:12f0:0000:000



0:0000:0001







The most widely used version The new version of IP address




of IP address which has more capabilities



than IPv4 in providing more IP




addresses





IPv4 uses a 32-bit address IPv6 uses a 128-bit address




scheme allowing for a total of scheme allowing for a total of



32
2 addresses 2 128 addresses

Internet Protocol address or IP address.















• Example :








IPv4 IPv6







10.20.20.16 2001:0db8:0a0b:12f0:0000:000



0:0000:0001







The most widely used version The new version of IP address




of IP address which has more capabilities



than IPv4 in providing more IP




addresses





IPv4 uses a 32-bit address IPv6 uses a 128-bit address




scheme allowing for a total of scheme allowing for a total of



32
2 addresses 2 128 addresses

Domain Name















• A domain name is a text-based name that






corresponds to the IP address of a server,





such as a web server that hosts a website.







• Examples:







– www.google.com






– www.kmk.matrik.edu.my

Domain Name















• A domain name is a text-based name that






corresponds to the IP address of a server,





such as a web server that hosts a website.







• Examples:







– www.google.com






– www.kmk.matrik.edu.my

Domain Name















• Every domain name contains a top-level






domain (TLD), which is the last section of the





domain name.







–www.kmk.matrik.edu.my







–www.google.com







–www.abim.org







–www.bankislam.biz







–www.speedtest.net

Domain Name















• Every domain name contains a top-level






domain (TLD), which is the last section of the





domain name.







–www.kmk.matrik.edu.my







–www.google.com







–www.abim.org







–www.bankislam.biz







–www.speedtest.net

Domain Name















• Two (2) types of TLD:







– Generic TLD (gTLD)






– Country Code TLD (ccTLD)






• A generic TLD identifies the type of






organization associated with the domain.







• Country Code TLD identifies the country of





origin associated with the domain.

Domain Name















• Two (2) types of TLD:







– Generic TLD (gTLD)






– Country Code TLD (ccTLD)






• A generic TLD identifies the type of






organization associated with the domain.







• Country Code TLD identifies the country of





origin associated with the domain.

Domain Name















• Examples:








.com - Commercial organizations, businesses, or





companies







.biz – Businesses






.edu – Educational institutions








.gov - Government agencies






.org - Nonprofit organizations








.my – Malaysia






.mil – Military organizations

Domain Name















• Examples:








.com - Commercial organizations, businesses, or





companies







.biz – Businesses






.edu – Educational institutions








.gov - Government agencies






.org - Nonprofit organizations








.my – Malaysia






.mil – Military organizations

Uniform Resource Locator















• Uniform Resource Locator is a unique address for






a webpages.







• Also called a web address.







• Examples of URL :






– https://mysejahtera.malaysia.gov.my/help/registration/





help_page.htm






– http://www.moe.gov.my

Uniform Resource Locator















• Uniform Resource Locator is a unique address for






a webpages.







• Also called a web address.







• Examples of URL :






– https://mysejahtera.malaysia.gov.my/help/registration/





help_page.htm






– http://www.moe.gov.my

Components of URL















• Protocol







• Host







• Domain Name







• Path







• Webpage Name











5


1 4

2



3







https:// www.mysejahtera.malaysia.gov.my / register / help_page.htm

Components of URL















• Protocol







• Host







• Domain Name







• Path







• Webpage Name











5


1 4

2



3







https:// www.mysejahtera.malaysia.gov.my / register / help_page.htm

Components of Web Address















• Protocol







– A set of rules that defines how pages transfer





on the Internet.






• Types of protocol:







– http (Hypertext Transfer Protocol)





- a standard set of rules that defines how




pages transfer on the Internet.







– https (Hypertext Transfer Protocol Secure)




- a protocol for secure communication over a





computer network.

Components of Web Address















• Protocol







– A set of rules that defines how pages transfer





on the Internet.






• Types of protocol:







– http (Hypertext Transfer Protocol)





- a standard set of rules that defines how




pages transfer on the Internet.







– https (Hypertext Transfer Protocol Secure)




- a protocol for secure communication over a





computer network.

Components of Web Address
















• Host







–The text between the protocol and the






domain name, identifies the type of





internet server or the name of the web






server.







• Domain name








–A text-based name that corresponds to the





IP address of a server, such as a web server






that hosts a website.

Components of Web Address
















• Host







–The text between the protocol and the






domain name, identifies the type of





internet server or the name of the web






server.







• Domain name








–A text-based name that corresponds to the





IP address of a server, such as a web server






that hosts a website.

Components of Web Address
















• Path







–Directories or folders that contains the files






being accessed.







• Web Page Name








–The name of the file that is being accessed.

Components of Web Address
















• Path







–Directories or folders that contains the files






being accessed.







• Web Page Name








–The name of the file that is being accessed.

Summary















Describe Internet Protocol (IP) address,






Uniform Resource Locator (URL).

Summary















Describe Internet Protocol (IP) address,






Uniform Resource Locator (URL).

3.1.5 Web Searching




























• Learning Outcomes:








3.1.5.1 Explain two types of search tools






• Search engine








• Subject directory

3.1.5 Web Searching




























• Learning Outcomes:








3.1.5.1 Explain two types of search tools






• Search engine








• Subject directory

Web Searching















• The World Wide Web (www), or the Web,






consists of a worldwide collection of





electronic documents (or webpages).







• The World Wide Web is one of the Internet






services.







• Emerged in the early 1990s.

Web Searching















• The World Wide Web (www), or the Web,






consists of a worldwide collection of





electronic documents (or webpages).







• The World Wide Web is one of the Internet






services.







• Emerged in the early 1990s.

Webpage and Website















• Webpages refers to an electronic document






on the web which can contain text, graphics,





animation, audio, and video.







• Websites is a collection of related







webpages and associated items







such as documents and







pictures, stored on a







web server.

Webpage and Website















• Webpages refers to an electronic document






on the web which can contain text, graphics,





animation, audio, and video.







• Websites is a collection of related







webpages and associated items







such as documents and







pictures, stored on a







web server.

Search Tools















• Search tool is a program available on the






Internet to help you find information among





the millions of documents on the Web.







• People use search tools to search for specific






information on the Web.

Search Tools















• Search tool is a program available on the






Internet to help you find information among





the millions of documents on the Web.







• People use search tools to search for specific






information on the Web.

Types of Search Tools















• Search Engine







• Subject Directory

Types of Search Tools















• Search Engine







• Subject Directory

Types of Search Tools:





Search Engine











• Search engine is a software that finds






websites, webpages, images, videos, news,





maps and other information related to a






specific topic.







• User can find webpages or information by





typing a word or phrase, called search text, in






the text box provided.







• Used in locating information for which you do





not know an exact web address or are not






seeking a particular websites.

Types of Search Tools:





Search Engine











• Search engine is a software that finds






websites, webpages, images, videos, news,





maps and other information related to a






specific topic.







• User can find webpages or information by





typing a word or phrase, called search text, in






the text box provided.







• Used in locating information for which you do





not know an exact web address or are not






seeking a particular websites.

Types of Search Tools:





Subject Directory











• Subject directory is a search tool that






classifies webpages in an organized set of





categories such sports or shopping and






related subcategories.







• User can locate webpages or information by





clicking the links through different levels,






moving from the general to the specific.

Types of Search Tools:





Subject Directory











• Subject directory is a search tool that






classifies webpages in an organized set of





categories such sports or shopping and






related subcategories.







• User can locate webpages or information by





clicking the links through different levels,






moving from the general to the specific.

Examples of Search Engine















• Google (http://www.google.com)







• Yahoo! (http://www.yahoo.com)







• MSN (http://www.msn.com)







• Gigablast (http://www.gigablast.com)







• Excite (http://www.excite.com)







• Open Directory Project (http://www.dmoz.org)

Examples of Search Engine















• Google (http://www.google.com)







• Yahoo! (http://www.yahoo.com)







• MSN (http://www.msn.com)







• Gigablast (http://www.gigablast.com)







• Excite (http://www.excite.com)







• Open Directory Project (http://www.dmoz.org)

Examples of Subject Directory















• Yahoo! (https://malaysia.yahoo.com/)







• MSN (https://www.msn.com/en-my/)







• Gigablast (https://www.gigablast.com/Top)







• Hillsborough Communities College







(https://libguides.hccfl.edu/subjectweb)

Examples of Subject Directory















• Yahoo! (https://malaysia.yahoo.com/)







• MSN (https://www.msn.com/en-my/)







• Gigablast (https://www.gigablast.com/Top)







• Hillsborough Communities College







(https://libguides.hccfl.edu/subjectweb)

Summary















• Explain two types of search tools.







–Search Engine







–Subject Directory

Summary















• Explain two types of search tools.







–Search Engine







–Subject Directory

3.0 INTERNET TECHNOLOGY





3.3 Internet Services




















• Learning Outcomes:







–Explain Internet Services

3.0 INTERNET TECHNOLOGY





3.3 Internet Services




















• Learning Outcomes:







–Explain Internet Services

3.1.6 Internet Services


















Learning Outcomes:







3.1.6.1 Explain internet services







• World Wide Web (WWW)







• Electronic Mail (e-Mail)







• Internet Messaging (IM)







• Voice Over Internet Protocol (VOIP)







• File Transfer Protocol (FTP)