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ITD 3194 – Aplikasi Web Chapter 1: Introduction to basic concepts of web application LECTURER: NORZITA BINTI DURIAT - Q (5) CONSULTATION: WEDNESDAY 10-12 pm Network is composed of several computers connected together to share resources and data. LAN? MAN? WAN? Internet a collection of interconnected computer networks, linked by copper wires, fiber-optic cables, wireless connections, etc. Visualization of the various routes through a portion of the Internet WWW (World Wide Web) services accessible via the Internet It is a graphical interface that utilizes the Internet to distribute and retrieve information. In contrast, the Web is a collection of interconnected documents and other resources, linked by hyperlinks and URLs or a collection of linked Web pages. ISP (Internet Service Provider) is a company or business that provides access to the Internet and related services. most ISPs were run by the phone companies, but now ISPs can be started by just about any individual or group with sufficient money and expertise. E.g iZZi by iZZinet Sdn.Bhd, P1 by Green Packet. Rather than dial-up and DSL, they may provide a combination of services including Internet transit, domain name registration and hosting, web hosting. IP (Internet Protocol) IP is a network layer protocol in the Internet Protocol Suite >> TCP/IP IP handles lower-level transmissions from computer to computer as a message makes its way across the Internet has the task of delivering distinguished protocol datagrams (packets) from the source host to the destination host solely based on their addresses. IP address is a unique address that certain electronic devices use in order to identify and communicate with each other on a computer network, utilizing the Internet Protocol standard (IP)—in simpler terms, a computer address. managed and created by the Internet Assigned Numbers Authority (IANA). An illustration of an IP address (version 4), in both dot-decimal notation and binary. Web Browser is a specific software program required to display Web pages. Access Web pages by entering its URL into the Web browser’s address bar. Identified!! Internet Explorer Mozilla Firefox Opera Netscape Navigator URL Uniform Resource Locator (URL) is comprised of the protocol, followed by the domain name. 1. Hypertext Transfer Protocol 2. Domain name can be an IP address or a text version of this address domain protocol name http://pucinfo.calumet.purdue.edu http://188.8.131.52 IP protocol address DNS Domain Name System (DNS) is to translate hostnames to IP addresses. DNS distributes the responsibility for assigning domain names and mapping them to IP networks by allowing an authoritative name server Search Engine A search engine is an information retrieval system designed to help find information stored on a computer system. A Web search engine is a search engine designed to search for information on the World Wide Web. Information may consist of web pages, images and other types of files. Other Internet Services 1. FTP – File Transfer Protocol (FTP) is a network protocol used to transfer data from one computer to another through a network, such as over the Internet. While transferring data over the network, several data representations can be used. ASCII mode: Binary mode: In "Binary mode", the sending machine sends each file byte for byte and as such the recipient stores the bytestream as it receives it. 2. Email – Electronic Mail (e-mail) is a store and forward method of composing, sending, receiving and storing messages over electronic communication systems. 3. Newsgroups – Newsgroup is a web application for holding discussions and posting user-generated content. its also commonly referred to as Web forums, message boards, discussion boards, (electronic) discussion groups, discussion forums, bulletin boards or forums. 4. Mailing Lists – A mailing list is a collection of names and addresses used by an individual or an organization to send material to multiple recipients. 5. Chat Rooms – A chat room is a term used primarily by mass media to describe any form of synchronous conferencing, occasionally even asynchronous conferencing – The term can thus mean any technology ranging from real-time online chat over instant messaging and online forums to fully immersive graphical social environments. 6. Web Portals – Web portal is site that provides a single function via a web page or site. Portals provide a way for enterprises to provide a consistent look and feel with access control and procedures for multiple applications, which otherwise would have been different entities altogether. – Two broad categorization of portals are a. Horizontal portals (e.g. Yahoo) b. Vertical portals (focused on one functional area. e.g., salesforce.com) 7. Telnet (Teletype Network) – A terminal emulation program for TCP/IP networks such as the Internet. The Telnet program runs on computer and connects PC to a server on the network. – User can enter commands through the Telnet program and they will be executed directly on the server console. This enables user to control the server and communicate with other servers on the network. Impact of the Internet and the Web 1. Education – Formal and informal teaching and learning – Learning and Teaching Style – Enhances traditional teaching methods – Online education or web base environment (course, material etc.) 2. Communication – worldwide communication medium that lends itself to the peculiar needs of international dialogue – Email, video conferencing, chat etc. 3. Medical – informational web-based tools for physicians, patients, and their families for best practices in clinical care, research, and education. – Share online medical resources. 4. Entertainment – Entertainment web sites include music, videos, sports, games, and Online gamming. 5. Business – Electronic commerce (e-commerce) is the practice of conducting business activities online, such as shopping – Business-to-consumer (B2C), Business-to-business (B2B), Consumer-to-consumer (C2C). – Opportunity to change its relationships with the organizations and individuals with which it does business-from trading partners to suppliers, from internal customers to end customers – Internet marketing, Internet advertising. – operation efficiencies and reduced costs.
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