Class Xth 2021-22 Computer Applications(165) Chapter -02 Internet Services

Chapter-02 Internet Services

Search Engine: - Search Engine is a web based application that helps in information finding.

Google, Yahoo, Bing and AltaVista, Duck-Duck Go are some popular search engines.

Spider or web crawler: - It crawls over the web to comb out any newly published web document and find their web address.

Protocols: - Protocols are some set of rules to data transfer. There are some popular protocols:

1. FTP (File Transfer Protocol): - FTP is used to exchange files between two or more computers on the Internet.

2. TCP/IP (Transmission Control Protocol/ Internet Protocol) - TCP breaks the data into small packets and IP transmitted these packets over the Internet.

3. HTTP (Hyper Text Transfer Protocol) - HTTP is a request/response protocol. It carries client request to server and server response to client.

4. SMTP (Simple Mail Transfer Protocol) - SMTP is the most common protocol used for sending e-mails between two or more servers.

5. IMAP and POP (Internet Message Access Protocol and Post Office Protocol) – IMAP and POP are used for retrieving e-mails.

                                    Services of Internet

1. E-Mail- E-Mail is the service of Internet. It is a paperless method for sending messages. An E-mail address has two parts the Header and the body separated by ‘@’ symbol. It does not contain spaces.

Ex.- sjb_vidyamandir@yahoo.com

2. Chat- It is an online conversation just like a written phone call.

3. Video Conferencing- It is a face to face conversation among the people to discuss political, business, medical and social affairs using microphone and camera. It saves time and money. Some software for video conferencing are- WhatsApp, Facebook, Skype, Zoom, GoToMeeting etc.

4. Social Networking- Social Networking is the grouping of individuals in to specific groups who share interests and activities. Facebook, Orkut, Twitter, Linkedin are some social networking sites.

5. Blog- A blog is an easy to create website that allow users to share their thoughts with the world. The process of updating a blog is called blogging and the person who writes a blog is called blogger.

6. Newsgroup- It is a platform where people can exchange information on any topic.

7. Usenet- Usenet stands for User’s Network. It enables its users to join a newsgroup for discussing various topics of their interests.

8. Telnet- Telnet is used to establish a connection between different computers, which may be geographically apart.

                                E- Services and their benefits

1. E-Learning- E-Learning means “Electronic Learning”.

                a. It is less expensive because it reduce travel cost and time.

                b. A student can attend class anytime, anywhere. Some E-Learning sites are-

                    https://www.w3schools.com/ 

                    http://www.tutor.com/

                    http://www.askiitians.com/ 

                    www.edx.org/

                    https://www.khanacademy.org/ 

                    www.tatainteractive.com

2. E-banking- E-banking stands for electronic banking. It is a way of performing bank transactions using Internet.

            a. It reduces the time to wait in a queue of a bank branch.

            b. Bank account can be accessed at any time, regardless of the working hours of the                 bank. 

    Some sites providing e-banking are-

            https://netbanking.netpnb.com 

            https://www.onlinesbi.com/

3. E-Shopping- It is also called Online Shopping. It allows purchasing of goods from any part of the world.

            a. It saves convenience cost and time.

            b. We can compare features and price.

Some useful sites for e-shopping are-

            www.ebay.in 

            www.amazon.com

            www.homeshop18.com 

            www.flipkart.com

There are some disadvantages also-

                There is a huge risk of online fraud.

                 Making online payment is not purely safe.

                 Refund and exchange of items is time consuming.

                 Product quality can be low.

4. E-Governance- The National e-Governance Plan (NeGP) is an initiative of the Government of India to make all government services available to the citizens of India via electronic media.

Some e-governance sites are-

        http://www.indianrail.gov.in 

        https://www.rbi.org.in/

        https://upsc.gov.in/ 

        https://incometaxindia.gov.in

        https://www.india.gov.in/ 

        https://uidai.gov.in/

        https://www.indiapost.gov.in 

        https://indane.co.in/

        https://portal1.passportindia.gov.in