Notes on Internet Topic

Slide 1 : By: SI Rajesh Kumar Haryana Police www.wiziq.com/tutor-profile/4604 Internet & Its Applications

Slide 2 : Internet * Format of URL Intranet * Format of Email Address Brief History * Types of Domains Requirement * How you will visit a website? Applications * Uses of Internet E-mail * Misuses of Internet Chatting * Portable Internet FTP * Features of GPRS www * Requirement for GPRS Search Engines * Limitations of GPRS Sub-Topics

Slide 3 : Internet is the term used for the wide area network/Global Area Network that connects computers, spread all over the world. Through Internet we can share text data, audio and video data. We can also chat with friends. No one is the owner of Internet. Internet consists of inter connection of networks of various types. It is the network of networks. Internet

Intranet is a small network as compared to Internet. It is owned by any company or firm. SWANs functioning in various states of our country are good examples of intranet. : Intranet is a small network as compared to Internet. It is owned by any company or firm. SWANs functioning in various states of our country are good examples of intranet. Intranet

ARPAnet link was established between three locations i.e. California, Los Angels and Stanford Research Institute in 1969.In 1971 email address format using @ was created. CompuServe became the first service provider to offer e-mail facility to PC users in 1979.TCP/IP emerged in nearly final form in 1978In 1980 first ISP came into existence.In 1989 first dial up ISP came into existence.First Web browser Mosaic was developed in 1993.Search engines were introduced like Lycos in 1993, Web Crawler in 1994, Yahoo and AltaVista in 1995 and Google in 1998 : ARPAnet link was established between three locations i.e. California, Los Angels and Stanford Research Institute in 1969.In 1971 email address format using @ was created. CompuServe became the first service provider to offer e-mail facility to PC users in 1979.TCP/IP emerged in nearly final form in 1978In 1980 first ISP came into existence.In 1989 first dial up ISP came into existence.First Web browser Mosaic was developed in 1993.Search engines were introduced like Lycos in 1993, Web Crawler in 1994, Yahoo and AltaVista in 1995 and Google in 1998 Brief History

Essentials of Internet connection are:– (1) PC with web browser. (2) Connectivity - (Telephone Connection, leased line or broadband connection. (3) Modem – connects computer with phone line & converts D/A + A/D (4) ISP – Internet Service Provider which connect us to Internet and charges amount for its services. ISP has computers called servers which remains permanently connected to other computers on net. ISP Provides us username and password to connect to Internet. Examples: BSNL, Satyam, Sify, Reliance etc. : Essentials of Internet connection are:– (1) PC with web browser. (2) Connectivity - (Telephone Connection, leased line or broadband connection. (3) Modem – connects computer with phone line & converts D/A + A/D (4) ISP – Internet Service Provider which connect us to Internet and charges amount for its services. ISP has computers called servers which remains permanently connected to other computers on net. ISP Provides us username and password to connect to Internet. Examples: BSNL, Satyam, Sify, Reliance etc. Requirement

E-mail:E-mail allows us to send & receive messages. You can attach pictures, videos and sounds to your email messages & send to any one having valid email address. Email address can be obtained free or with costs from indiatimes, rediff, sify oryahoo etc. famous websites : E-mail:E-mail allows us to send & receive messages. You can attach pictures, videos and sounds to your email messages & send to any one having valid email address. Email address can be obtained free or with costs from indiatimes, rediff, sify oryahoo etc. famous websites Applications of Internet

In this type of communication participants type messages to other chat group participants and receiver response instantly which they can read on screen. Some sites also provide audio & video chat that may be performed with the help of web cam. This here how a messenger screen looks alike: : In this type of communication participants type messages to other chat group participants and receiver response instantly which they can read on screen. Some sites also provide audio & video chat that may be performed with the help of web cam. This here how a messenger screen looks alike: Chatting

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You can send (Upload) & receive (Download) large files over the net from one computer to another through FTP. The file can be of Word or Excel or of any other format. : You can send (Upload) & receive (Download) large files over the net from one computer to another through FTP. The file can be of Word or Excel or of any other format. FTP File Protocol Transfer

It is the same as traveling in the Information World. It contains millions of documents or pages (web pages) consisting of text, graphics, video and audio & links to other web pages (Hyperlinks).Cursor takes the shape of hand on the hyperlink. When we click on it, linked web page is opened. The collection of these web pages is called a Website. The websites can be accessed/browsed by a application software called Web Browser e.g. Internet Explorer, Netscape navigator, Opera, Mozilla etc. This facility allows you to see any page, provided permission is granted for that page. : It is the same as traveling in the Information World. It contains millions of documents or pages (web pages) consisting of text, graphics, video and audio & links to other web pages (Hyperlinks).Cursor takes the shape of hand on the hyperlink. When we click on it, linked web page is opened. The collection of these web pages is called a Website. The websites can be accessed/browsed by a application software called Web Browser e.g. Internet Explorer, Netscape navigator, Opera, Mozilla etc. This facility allows you to see any page, provided permission is granted for that page. W.W.W.

Slide 12 : Preview of a Web Page

Search Engine – is a website (collection of web pages) that allows you to search desired information from a vast database of web pages on www. When we type keywords in search box it will show us numerous such pages consisting of desired information with links. Examples are Yahoo, Google, AltaVista, Search123 etc. The next slide shows the preview of a most popular search engine. : Search Engine – is a website (collection of web pages) that allows you to search desired information from a vast database of web pages on www. When we type keywords in search box it will show us numerous such pages consisting of desired information with links. Examples are Yahoo, Google, AltaVista, Search123 etc. The next slide shows the preview of a most popular search engine. Search Engine

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Folders on e-mail page : Folders on e-mail page Inbox: contains the received messages Sent/outbox: contains the messages you have sent to others Spam/Bulk: unwanted commercial messages Drafts: messages you have created but not sent Trash: the received messages those you have deleted Compose: this link opens the page where you write the message for sending to others

Advantages of email : Advantages of email Cost of sending an email message is nil Messages sent and received instantly Emails do not get lost or reach in wrong hands Allows you to remain in touch with your friends and relatives staying far away Pictures, videos and sounds may be attached with messages You can read, print, forward, reply and delete the received messages.

Slide 17 : URL i.e. address of website is of the following format: http://www.earnoncomputer.info http://www.google.com http---hypertext transfer protocol www—world wide web Google/earnoncomputer--- domain name .info, .com--- types of domain Format of URL

Slide 18 : At the rate E-Mail address may be of the following format: asiraj_67@yahoo.co.in asiraj_67@operamail.com username host name type of domain Format of E-Mail Address

Slide 19 : Various types of domains are used on the Internet to distinguish between the types of websites, like .com---- commercial .edu or .ac----educational .net------belonging to a networking or Internet service provider company .org-----organization .ws--------website hosting or domain registration related websites .gov----Government .in-------Indian .au-----Australia .uk------United Kingdom .info-----informational website Types of Domains

Slide 20 : Open Internet explorer by Start Program Internet Explorer or Double click on Internet Explorer icon on desktop after connecting to Internet. It will open Internet Explorer with default page or home page. Type URL (Uniform resource Locator), the address of the website e.g. www.earnoncomputer.info or www.tutor-desirachh.blogspot.com and press enter or click on go button. Now you can see desired page. You may click on desired hyper link. How will you visit a web site

Slide 21 : Uses Staying in touch: E-mail, Y-mail, Hot mail etc. Text message: Text message can be send & received instantly. One form of chat - Y-messenger, MSN, Rediff Bol messengers VOIP : Voice over Internet protocol, Cheap calls may be made all over the world. Networking and collaboration: friendship across world wide. Downloading Data & other software etc Wikipaedia : Information of any type and about any subject can be found here. News and Updates : Prompt news updates e.g NDTV.com Conducting business & shopping online: amazon.com, indiatimes.com, ebay.com, google adsense Entertainment: Music, Movies, Video clips, Online Radio stations, Gaming. Online Banking: Most of the banks are providing this facility. Blogging (Web log): Like personal web diary, any one can use. Check my blog http://tutor-desirachh.blogspot.com for free information about Computers and Technology. 13. On line learning: You can teach/learn on net. For computer learning you can take my services here: http://www.wiziq.com/tutor-profile/4604 14. You can work from home in your extra time and make $$s. Click on http://www.earnoncomputer.info for more information. You may also see my earning on next slide.

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Slide 23 : Spamming: Unsolicited and usually commercial emails sent to a large no. of addressees. Anti-spam software may be used to avoid these. Viruses: Viruses spread automatically through Internet and make loss to large number of Software and Hardware. Latest anti-virus should be used to be safe from the viruses. Phising: Attempting to fraud in bank accounts etc. Do not give vulnerable and important information about credit cards and bank accounts etc. Pornography: Nude pictures and videos. Porn stoppers should be used to handle these. Misuse

Portable Internet : Portable Internet Mobile phones use two technologies for connectivity/communication GSM: Global System for Mobile Communications—SIM cards are used CDMA: Code Division Multiple Access—SIM cards are not used e.g. Reliance and Tata phones

GSM networks use following technologies for Internet access : GSM networks use following technologies for Internet access GPRS: General Packet Radio Service This technology allows information to be sent back and forth across a mobile network. This is additional service than Circuit Switch Data (CSD) i.e. audio calls and SMS (Short Message Service)

Features of GPRS : Features of GPRS Max. Theoretical speed up to 171.2 kbps i.e. Three times faster than Dial Up Internet Connections. Instantaneous: Information may be sent and received instantaneously May be used for checking live Cricket scores, file transfer applications, chatting, etc. In future may be used for controlling in house appliances like TV, fans and Acs and other machines by your mobile phones You may connect your computer/laptop with mobile and enjoy Internet

Requirement of GPRS : Requirement of GPRS GPRS enabled mobile phone. Any phone costing above Rs. 3000/- these days may work. GPRS service provider like BSNL, Reliance, Tata Indicom or Airtel Know-how and some expenditure to use GPRS

Limitations of GPRS : Limitations of GPRS Overloading of networks: Lot of data is transferred using GPRS using the same networks we use for audio calls Lower speed: Theoretically 171.2 kbps but seldom achieved No store and forward mechanism like SMSs are stored and forwarded to destination phone when switched. Not suitable for video conferencing like services where we need much bandwidth

EDGE: Enhanced Data Rates for GSM Evolution : EDGE: Enhanced Data Rates for GSM Evolution Also known as Enhanced GPRS and is much better than GPRS High Speed 3G, the much published mobile 3rd generation service is based on EDGE

USB Dialers : USB Dialers Various Internet Service Providers like BSNL, Reliance and Tata etc. are providing their services through USB dialers. A pen drive type small device with a SIM card fitted in it employs CDMA technology and offers a good speed. May be connected to any Laptop or Desktop for Internet access

Slide 31 : Dhanyabad