Internet - Services - Advantages and Disadvantages [Computer Science - Grade X - New Syllabus]

 Internet - Services - Advantages and Disadvantages [Computer Science - Grade X - New Syllabus]

Internet [SLC 2065 S] [SLC 2066] [SLC 2069] [SLC 2069 S] [SLC 2071 S] [SEE 2074] [MFT 2075]

Internet is an interconnection of several thousands of computers of different types belonging to the various networks all over the world in order to share data and information.

 In other words network of networks is called Internet.

 

Who controls internet?

Different organization like ISOC (Internet Society), W3C (World Wide Web Consortium), IAB (Internet Architecture Board), IEFT (Internet Engineering Task Force), IRTF (Internet Research Task Force), IESG (Internet Engineering Steering Group) and INIC (Internet Network information Centre) gives directive and guideline for the proper use of internet.

 

Internet called Network of networks [PMT 2075K]

The internet is called ‘network of networks’ because all the smaller networks of organizations are linked together into the one giant network called the internet.

 

Protocol used by the internet.

TCP/IP is the communication protocol used by the internet.

 

Components required for internet connection

a)      A TCP/IP enabled computer with web browser

b)     An account with an ISP

c)      Router / MODEM (necessary if you are using a telephone line to access the Internet)

d)     Connection (ISDN, Satellite, cable and dial-up)

 

ADSL (Asymmetric Digital Subscriber Line) [SQE 2074K]

ADSL is a technology for transmitting digital information at a high bandwidth on existing phone lines to homes and businesses. Unlike regular dialup phone service, ADSL provides continuously-available, "always on" connection.

 

Services of internet [SLC 2065] [SLC 2068] [SEE 2072] [MFT 2075] [U1]

a)      WWW (World Wide Web)

b)     E-mail (Electronic mail)

c)      FTP (File Transfer Protocol)

d)     IRC (internet Relay Chat)

e)      Newsgroup

f)      Telnet

g)     E-commerce

 

Advantages of internet [SLC 2065 S] [SEE 2075]

a)      Internet has an endless knowledge supply which anyone can access that too free of cost.

b)     Selling and buying has become so easy with the use of internet and it has helped millions to sell and buy their goods online.

c)      Internet has given us E-Mail which is fast, secure and reliable mode of communication.

d)     It makes easy to transfer the file or information.

 

Disadvantages of internet

a)      Increasing virus threats not only steals your sensitive data but also damages your computer.

b)     People using too much of internet get disconnected from the real world. 

c)      Pornography that can get in the hands of young children too easily.

d)     Addiction to online games affects health leading to obesity and serious health issues.

 

Intranet

An intranet is a private computer network that uses the internet protocol to securely share any part of information of an organization. It is owned by a single organization or company. It can only be used by the employees of the owned organization.

 

Extranet

An extranet is a computer network that allows controlled access from outside for specific business or educational purposes.

 

ISP (Internet Service Provider) 
An Internet service provider (ISP) is an organization that provides services for accessing and using the Internet. World Link, Mercantile, Classitech, Vianet etc are the ISPs of Nepal.

 

E-mail (Electronic Mail) [SLC 2068 S] [SLC 2069 S] [SEE 2075 S2] [MM 2076] [MFT 2075]
E-mail (Electronic mail) is one of the most popular services provided by the internet which exchanges messages between the computers through a network. It is the soft copy service of the internet.

E-mail can be sent using a computer with modem, e-mail program and internet facility.

E.g. xyz@gmail.com

Any four sites that provide e-mail services are:

a)      www.yahoomail.com

b)     www.hotmail.com

c)      www.gmail.com

d)     www.outlook.com

 

Advantages of E-mail [SEE 2067 S] [SLC 2070] [SEE 2073 U] [MM 2076] [MF 2076] [MFT 2075]

a)      It allows to send and receive message across the world at very low cost.

b)     E-mail is faster, cheaper, more reliable than traditional mail.

c)      The image, sound, video and documents can be attached to e-mail message.

d)     Email can be accessed from anywhere in the world.

 

Disadvantages of e-mail
i) Minor mistakes in e-mail address may deliver the mail to wrong address.
ii) Since it passes through a vast electronic network, it may be seized in between.

 

Newsgroup
Newsgroups are discussion groups that focus on a particular topic such as politics, health, computer, etc. The interested people on the particular field write the information or articles. Then these articles are posted to the newsgroup so that other people can read them.

 

Telnet
A telnet is a program that allows a user to log in to a remote computer on internet as a user on that system.

FTP (File Transfer Protocol) [MFT 2075]
File Transfer Protocol is the internet tool that allows the user to transfer the file from one computer to another computer. It helps to upload and download the files.

 

Use / Function of FTP [SLC 2071] [SEE 2073]

File Transfer protocol helps to transfer (download or upload) files from one computer to another computer.

 

Uploading [MF 2076] [MFT 2075]
Uploading refers to copying files or documents, programs or data from the user computer to the internet server.

Downloading [MF 2076] [MFT 2075]
Downloading refers to the copying files or document or program or data from the internet server to the user computer.

 

IRC (Internet Relay Chat) [MFT 2075]
Internet Relay Chat is one of the important services provided by the internet which allows the user to communicate with other people in real time.

It uses the browser software without using special chat software. It communicates only text.

For eg: chatting on facebook.

 

FAQ (Frequently Asked Questions)

FAQ (Frequently Asked Questions) is an online document that possesses series of common questions and answers on a specific topic.

 

Video conferencing
Video conferencing is an important and interesting service provided by the internet which makes communication using sounds as well as pictures. It requires necessary hardware and software to see and speak to each other.

It enables virtual face-to-face communication among people sitting at different locations.

For eg: chatting on skype.

 

Web browser [SEE 2075 U] [SLC 2067] [MF 2076]
Web browser is a computer program that access web pages and displays them on the user computer.

Examples of web browsers are Mozilla Firefox, Google chrome, Internet Explorer, opera etc. Browsing/ Surfing means searching information on the internet.

 

URL (Uniform Resource Locator)
Ans: URL is a unique address that provides location of a webpage on the internet.

Example of URL: http://www.abc.com/mainpage/first.html

http: protocol name, www.abc.com: server name, mainpage: path, first.html: filename

 

Search engine [SEE 2074 U] [SQE 2075K]
Ans: A search engine is a software program or script available through the Internet that searches documents and files for keywords and returns the results of any files containing those keywords. They are used to locate specific sites and information. Examples of search engines are Google, Bing, Yahoo etc

 

Blog (weblog)

A blog is a time-stamped online journal that appears on a website. A blog is a frequently updated online personal journal or diary. A place to share your thoughts and your passions to the world.

 

Wi-Fi (Wireless Fidelity)

Wi-Fi is the name of a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections.

 

WWW (World Wide Web)

The World Wide Web (abbreviated WWW or the Web) is an information space where documents and other web resources are identified by Uniform Resource Locators (URLs), interlinked by hypertext links, and can be accessed via the Internet.

 

DNS (Domain Name System)

Domain Name System is an Internet service that translates domain names into IP addresses.