Internet Technologies Useful Resources - Learn Internet Technologies in. INTERNET OVERVIEW. Internet. Internet is defiend as an Information super. Web Tutorial in PDF - Learning web site designing and hosting concepts from experienced web developers. Start your ecommerce Web Site and sell it after.
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Internet Technologies Tutorial for Beginners - Learn Internet Technologies in simple and easy steps starting from basic to advanced concepts with examples. Trivial File Transfer Protocol is also used to transfer the files but it transfers the. Internet Technologies - Quick Reference Guide - Learn Internet Technologies.
Cyber criminals have evolved several techniques to threat privacy and integrity of bank accounts, businesses, and organizations. Provides a comprehensive exposition of the state-of-the art in Semantic Web research and key technologies. It is also possible to do online certification on specialized courses which add value to your qualification. Email spams are the junk mails sent by commercial companies as an advertisement of their products and services. It allows to send text, video, and audio messages. Understanding and using presentation-oriented, data-oriented, process-oriented, or hybrid mashup styles.
Non profit organisation or cultural institituion will be your client senario in this process of knowledge learning and development. The subject shares on the knowledge how to use some of these technologies to develop static and dynamic web pages with an emphasis on client-side scripts to enhance a e-business operations. The subject explains the differences between client-side and server-side Web development, and shows students how to build simple web applications using scripting and other tools from the open sources development.
Chapter 1: XML Concepts. XML Documents. XML Parsing Concepts. XSLT Concepts. XSL Transformations. XSL Formatting Objects. Chapter Open source libraries for working with Java tools are referenced and specific code examples are provided for working with Xalan and Xerces. Part V: Part V ends with a comparison of J2EE and Microsoft Web services, which both use the same underlying technologies but implement them in subtly different ways.
Web Service Concepts. Microsoft Web Services. J2EE Web Services. These include using ASP. NET for creating and deploying. NET Web services, accessing. Net and Visual Basic. Creating and Deploying. NET Web Services. Building a. Build Tool, and the Apache Tomcat container.
We finish this part of the book with examples for deploying.
Apache Axis. Accessing Web Services from Java Applications. We also delve into the developing standards associated with Web service security. Standards-based options for Web service. Accessing Relational Data via Web Services. Authentication and Security for Web Services. Benz, B. XML Programming Bible. An Introduction to XML provides students and entry-level professionals with demonstrations of the basics of learning XML, covering topics such as Web 2.
Watch the series of modules or select a module by topic, and join the developerWorks community to talk to peers about this and other skills sessions.
Video located at http: Through examples and industry references, this demo provides an introductory look at these concepts and how XML plays a role.
These machine-interpretable descriptions allow more intelligent software systems to be written, automating the analysis and exploitation of web-based information. Software agents will be able to create automatically new services from already published services, with potentially huge implications for models of e-Business.
Semantic Web Technologies provides a comprehensive overview of key semantic knowledge technologies and research. The authors explain semi- automatic ontology generation and metadata extraction in depth, along with ontology management and mediation.
At Hazman Labs, Inc. To find out more, http: Davies, J. Semantic Web Technologies [electronic resource]: Trends and Research in Ontology-based Systems. A short introduction to the semantic web. All source material is on the Digital Bazaar wiki: This is a prototype showing some basic functionality of a library search interface where users can search and explore books enriched with data of the semantic web. Non NTU community, you might want to check out with your own academic librarians:.
Creating Enterprise-Quality Web 2. The Complete How-To Guide. In Mashups: Strategies for the Modern Enterprise, J. Jeffrey Hanson brings together all the knowledge enterprise developers need to create mashups that are reliable, secure, flexible, and effective. Using detailed sample code and third-party tools, Hanson walks readers through every step of creating a working enterprise mashup, as well as every component: He surveys the styles, technologies, and standards used in mashup development, identifying key trade-offs and helping you choose the best options for your environment.
Understanding and using presentation-oriented, data-oriented, process-oriented, or hybrid mashup styles. Up-front planning: Creating an enterprise mashup, step by step: However these terms are used interchangeably. Wireframe refers to a visual guide to appearance of web pages. It helps to define structre of web site, linking between web pages and layout of visual elements.
Without container there would be no place to put the contents of a web page. Oftenly the anvigation is placed rigth at the top of the page. Footer is located at the bottom of the page. It usually contains copyright, contract and legal information as well as few links to the main sections of the site.
It is also called as negative space and refers to any area of page that is not covered by type or illustrations.
Web development refers to building website and deploying on the web. Web development requires use of scripting languages both at the server end as well as at client end. Web development process includes all the steps that are good to take to build an attractive, effective and responsive website. These steps are shown in the following diagram:.
Web development tools helps the developer to test and debug the web sites. Now a days the web development tooll come with the web browsers as add-ons. All web browsers have built in tools for this purpose. Web development tools also helps to inspect the resources that are loaded and available on the web page. Profiling refers to get information about the performance of a web page or web application and Auditing provides developers suggestions, after analyzing a page, for optimizations to decerease page load time and increase responsiveness.
Testing for compliance to specified standards such as accessibility standards in the client region. Web hosting is a service of providing online space for storage of web pages.
These web pages are made available via World Wide Web. The companies which offer website hosting are known as Web hosts. The servers on which web site is hosted remain switched on 24 x7. These servers are run by web hosting companies. Each server has its own IP address. Since IP addresses are difficult to remember therefore, webmaster points their domain name to the IP address of the server their website is stored on. It is not possible to host your website on your local computer, to do so you would have to leave your computer on 24 hours a day.
This is not practical and cheaper as well. This is where web hosting companies comes in. Websites are always to prone to security risks. Cyber crime impacts your business by hacking your website. It is mandatory to keep you software updated.
It plays vital role in keeping your website secure. It is an attempt by the hackers to manipulate your database. It is easy to insert rogue code into your query that can be used to manipulate your database such as change tables, get information or delete data.
It allows the attackers to inject client side script into web pages. Therefore, while creating a form It is good to endure that you check the data being submitted and encode or strip out any HTML.
You need to be careful about how much information to be given in the error messages. For example, if the user fails to log in the error message should not let the user know which field is incorrect: It is good to enforce password requirements such as of minimum of eight characters, including upper case, lower case and special character.
The file uploaded by the user may contain a script that when executed on the server opens up your website. It is good practice to use SSL protocol while passing personal information between website and web server or database. A technical definition of the World Wide Web is: The World Wide Web is the universe of network-accessible information, an embodiment of human knowledge. In simple terms, The World Wide Web is a way of exchanging information between computers on the Internet, tying them together into a vast collection of interactive multimedia resources.
World Wide Web came into existence as a proposal by him, to allow researchers to work together effectively and efficiently at CERN. Eventually it became World Wide Web. RDF represents data about resource in graph form.
It comes in following three versions:. All semantic and rules that are executed at layers below Proof and their result will be used to prove deductions.
Cryptography means such as digital signature for verification of the origin of sources is used. User enters the URL say, http: After receiving IP address, browser sends the request for web page to the web server using HTTP protocol which specifies the way the browser and web server communicates. Then web server receives request using HTTP protocol and checks its search for the requested web page.
If found it returns it back to the web browser and close the HTTP connection. There had been a rapid development in field of web. It has its impact in almost every area such as education, research, technology, commerce, marketing etc. So the future of web is almost unpredictable.
Apart from huge development in field of WWW, there are also some technical issues that W3 consortium has to cope up with. Work on higher quality presentation of 3-D information is under deveopment. The W3 Consortium is also looking forward to enhance the web to full fill requirements of global communities which would include all regional languages and writing systems.
Work on privacy and security is under way. This would include hiding information, accounting, access control, integrity and risk management. There has been huge growth in field of web which may lead to overload the internet and degrade its performance. Hence more better protocol are required to be developed. User can request for any web page by just entering a URL into address bar.
Web browser can show text, audio, video, animation and more.
It is the responsibility of a web browser to interpret text and commands contained in the web page. Earlier the web browsers were text-based while now a days graphical-based or voice-based web browsers are also available. Following are the most common web browser available today:. There are a lot of web browser available in the market. All of them interpret and display information on the screen however their capabilities and structure varies depending upon implementation.
But the most basic component that all web browser must exhibit are listed below:. Controller works as a control unit in CPU. It takes input from the keyboard or mouse, interpret it and make other services to work on the basis of input it receives. Interpreter receives the information from the controller and execute the instruction line by line. Some interpreter are mandatory while some are optional For example, HTML interpreter program is mandatory and java interpreter is optional.
Client Program describes the specific protocol that will be used to access a particular service. Following are the client programs tat are commonly used:. Web server is a computer where the web content is stored. Basically web server is used to host the web sites but there exists other web servers also such as gaming, storage, FTP, email etc.
When client sends request for a web page, the web server search for the requested page if requested page is found then it will send it to client with an HTTP response.
If the requested web page is not found, web server will the send an HTTP response: Error Not found. If client has requested for some other resources then the web server will contact to the application server and data store to construct the HTTP response. Concurrent approach allows the web server to handle multiple client requests at the same time. It can be achieved by following methods:. In this a single process parent process initiates several single-threaded child processes and distribute incoming requests to these child processes.
Each of the child processes are responsible for handling single request. It is the responsibility of parent process to monitor the load and decide if processes should be killed or forked. It is combination of above two approaches. In this approach multiple process are created and each process initiates multiple threads. Each of the threads handles one connection. Using multiple threads in single process results in less load on system resources.
Proxy server is an intermediary server between client and the internet. Proxy servers offers the following basic functionalities:. In this the requests are forwarded to one or more proxy servers and the response from the proxy server is retrieved as if it came directly from the original Server.
This module controls and manages the user interface and provides an easy to use graphical interface, window and a menu to the end user. This menu offers the following functionalities:. It is the port where new request from the client browser is listened. This module also performs blocking of clients from the list given by the user. If no copy of page is found in the cache then download the page from web server else will check its last modified date from the reply header and accordingly will read from the cache or server from the web.
This module is responsible for storing, deleting, clearing and searching of web pages in the cache. This module helps to create configuration settings which in turn let other modules to perform desired configurations such as caching. Search Engine refers to a huge database of internet resources such as web pages, newsgroups, programs, images etc.
It helps to locate information on World Wide Web. User can search for any information by passing query in form of keywords or phrase. It then searches for relevant information in its database and return to the user. It is also known as spider or bots. It is a software component that traverses the web to gather information.
This component is an interface between user and the database. It helps the user to search through the database. Web crawler, database and the search interface are the major component of a search engine that actually makes search engine to work. Following are the steps that are performed by the search engine:.
The search engine looks for the keyword in the index for predefined database instead of going directly to the web to search for the keyword. It then uses software to search for the information in the database. This software component is known as web crawler. Once web crawler finds the pages, the search engine then shows the relevant web pages as a result. These retrieved web pages generally include title of page, size of text portion, first several sentences etc.
Online chatting is a text-based communication between two or more people over the network.
In this, the text message is delivered in real time and people get immediate response. Instant messaging is a software utility that allows IM users to communicate by sending text messages, files, and images. Some of the IMs also support voice and video calls. Internet Relay Chat is a protocol developed by Oikarinen in August It defines set of rules for communication between client and server by some communication mechanism such as chat rooms, over the internet.
The video streaming session can be initiated by any of the parties. Moreover, the video source can be the camera or the pre-recorded video clip. In order to send same email to a group of people, an electron list is created which is know as Mailing List. It is the list server which receives and distributes postings and automatically manages subscriptions.
Mailing list offers a forum, where users from all over the globe can answer questions and have them answered by others with shared interests. It contains the group of people who have responsed to an offer in some way. These people are the customers who have shown interest in specific product or service. The compiled list is prepared by collecting information from various sources such as surveys, telemarketing etc.
These lists are created for sending out coupans , new product announcements and other offers to the customers. This list is created for sharing views on a specific topic suchas computer, environment , healt, education etc. Before joining a mailing list, it is mandatory to subscribe to it. Once you are subscribed, your message will be sent to all the persons who have subscribed to the list. Similarly if any subscriber posts a message, then it will be received by all subscribers of the list.
There are a number of websites are available to maintain database of publically accessible mailing list. Some of these are:. To subscribe to a list, you need to send an email message to the administrative address mailing list containing one or more commands. For example, if you want to subscribe to Harry Potter list in gurus.
There are many list servers available, each having its own commands for subscribing to the list. Some of them are described in the following table:. Like mailing lists Usenet is also a way of sharing information. It was started by Tom Truscott and Jim Ellis in Initially it was limited to two sites but today there are thousands of Usenet sites involving millions of people.
Usenet is a kind of discussion group where people can share views on topic of their interest. The article posted to a newsgroup becomes available to all readers of the newsgroup. Online Training is a form of distance learning in which educational information is delivered through internet. There are many online applications. These applications vary from simple downloadable content to structured programs.
It is also possible to do online certification on specialized courses which add value to your qualification. Many companies offer online certification on a number of technologies. Product-specific certifications target at developing and recognizing adeptness with regard to particular product. Online seminar is the one which is conducted over the internet. Online seminar just requires a computer with internet connection, headphones, speakers, and authorization to attend it.
Webinar is a web based seminar or workshop in which presentation is delivered over the web using conferencing software. The audio part of webinar is delivered through teleconferencing. Online conferencing is also a kind of online seminar in which two or more people are involved. It is also performed over the internet. It allows the business persons to do meeting online. Social Networking refers to grouping of individuals and organizations together via some medium, in order to share thoughts, interests, and activities.
There are also several mobile based social networking services in for of apps such as Whatsapp, hike, Line etc. The following table describes some of the famous social networking services provided over web and mobile:. Internet security refers to securing communication over the internet. It includes specific security protocols such as:.
Internet security threats impact the network, data security and other internet connected systems. Cyber criminals have evolved several techniques to threat privacy and integrity of bank accounts, businesses, and organizations.
Most often such emails contain grammatically incorrect text. Ignore such emails, since it can be a spam. These emails contain graphics that appear to be connected to legitimate website but they actually are connected to fake websites.
Digital signatures allow us to verify the author, date and time of signatures, authenticate the message contents. It also includes authentication function for additional capabilities. Digital signatures help to authenticate the sources of messages. If the central office could not authenticate that message is sent from an authorized source, acting of such request could be a grave mistake.
By this property, any entity that has signed some information cannot at a later time deny having signed it. It allows keeping private resources confidential and minimizes the security risks. It controls network traffic, in both directions. The following diagram depicts a sample firewall between LAN and the internet.
The connection between the two is the point of vulnerability. Both hardware and the software can be used at this point to filter network traffic. There are two types of Firewall system: One works by using filters at the network layer and the other works by using proxy servers at the user, application, or network layer.
The amount of filtering a firewall varies. For the same firewall, the amount of filtering may be different in different directions. It is a formatting language used to define the appearance and contents of a web page. It allows us to organize text, graphics, audio, and video on a web page.
Key Points: The word Hypertext refers to the text which acts as a link. The word markup refers to the symbols that are used to define structure of the text. The markup symbols tells the browser how to display the text and are often called tags. Tag is a command that tells the web browser how to display the text, audio, graphics or video on a web page. The starting and closing tag name must be the same. Each region contains separate html web page and each of them work independently.
Forms are used to input the values. These values are sent to the server for processing. Forms uses input elements such as text fields, check boxes, radio buttons, lists, submit buttons etc. All changes made would be reflected automatically to all of the web pages of the website in which that element appeared. Embedded Style Sheets are used to apply same appearance to all occurrence of a specific element.