Sunday, September 18, 2011

Advantages and Disadvantages Of Internet

what are the advantages and disadvantages of internet

Internet has many advantages for users along with some disadvantages too. Let us discuss the benefits of using Internet first.

ADVANTAGES OF INTERNET


what are the advantages and disadvantages of internet

what are the advantages and disadvantages of internet



Following are the main advantages of internet:

1. THE WORLD WIDE WEB

This is also called web or www or 3w. The collection of all web pages in all web sites on internet is called www. These web pages provide us information.

2. E-MAIL

E-mail stands for electronic mail. It is the most popular, cheap, easy and fastest mailing service. We can send and receive messages on internet with in seconds or minutes.

3. NEWSGROUPS

Newsgroups are discussion groups on internet. They are used for free exchange of information.

4. MAILING LISTS

Mailing lists provide information to the users on the selected topics through email. Mailing lists are maintained by different companies.

5. ONLINE BANKING

Several banks are online now. So we can manage our bank accounts on internet. Due to online banking, money is transferred from one city or country to another within seconds or minutes.

6. E-COMMERCE

E-commerce means the electronic commerce. It means that doing business on internet. Now we can sell and purchase goods from any where in the world through internet.

7. JOB SEARCH

You can search jobs on internet. There are many job seeking sites on internet.

8. SEARCH ENGINE

Internet contains a very large amount of information. Search engine is used to easily and quickly find the required information. Many sites provide facility of search engine like Google, Yahoo, Find, Lycos and AltaVista.

9. CHAT

It is the most popular services by which two users can live chat with each other. It is just like talking on telephone. We can chat by text or audio or video. Messenger software like Yahoo messenger or MSN messenger is used for chatting.

10. INTERNET PHONE

We can call on phone to some one on internet. This is cheaper than calling by ordinary phone.

11. FAX

Fax messages can be sent to persons that use fax machines.

12. FUN AND ENTERTAINMENT

You can find films, cartoons, audio and video songs on internet.

13. EDUCATION

There many web sites that provide educational facilities. So education can be achieved online.

14. NEWS PAPERS

Now many newspapers have their websites. We can read news from internet now.

15. DOWNLOAD FREE SOFTWARE

We can download (save in our computer) free software from internet.

16. UPLOAD INFORMATION

We can upload information (send from our computer) on internet. So that this information will be available for internet users.

17. HOTEL RESERVATION

You can get reserved a room for you in a hotel while sitting at your home. Several hotels are online now. You will just open the website of a given hotel and book some room as required.

18. ONLINE SHOPPING

You can do all types of shopping on internet. Online shopping is becoming more popular in progressive countries too.

19. DOWNLOAD GAMES

You can download computer games from internet. There are many websites that provide tons of games to download free. They also provide necessary help documentation to play these games smoothly.

20. Traveling Guides

You can find information about any country of the world on internet. You can find maps of any country and big cities.

DISADVANTAGES OF INTERNET

There are some disadvantages of Internet as discussed below:

1. HACKING

Hackers access the important information and programs and may destroy it. Hackers try to get password of internet users and then access important information.

2. COMPUTER VIRUS

Computer virus is a program developed for some destructive purpose. Computer virus can destroy your data or software. Virus enters into your computer by internet, floppy disc, CD or USB flash memory drive. Antivirus software like Norton Antivirus and McAfee Antivirus are used to find and remove virus. Other examples of antivirus software are AVAST anti virus , Panda Anti virus, ESET NOD 32 anti virus, AVG anti virus and Malwarebytes anti virus etc.

3. WASTAGE OF TIME

There are so many interesting facilities on internet. So people use internet for several hours. In this way valuable time is wasted.

4. EDUCATIONAL LOSS OF STUDENTS

Students spend much time in internet café. So they waste their time and do not attend their studies properly. This will lead to low grades in their studies.

5. ONLINE ROBBERY

Important documents are stolen on internet. Passwords of credit cards are stolen on internet. This can do financial loss.

6. IMMORAL WEB SITES / PORNOGRAPHY

There are many immoral sites on internet. This is destroying high values of the societies that don't allow such sexual  material or illegal sexual relations. PORN websites are destroying character of  the preteen and teenagers. There is a strong need to stop / filter porn websites in our country.

7. LOSS OF MONEY

Internet is not free. Internet users pay monthly charges to ISPs. Moreover, electricity bill is also increased by using computer and internet for many hours daily. In addition using computer systems for long times will result in fatigue and other health problems so that a lot of money will be consumed on medications.

7. LOSS OF HEALTH

Most of the users use internet for long time daily. They sit before computer for many hours. This may create health problems like weak eye sight, tiredness, fatigue, headache etc.

8. SOCIAL DISCONNECTION

Internet users give most of time to computer and internet. They always like to sit before computer. They have no time for their friends or family members or relatives. They like to eat while using internet for chatting, on facebook or youtube. They are cut off the external world just for internet. This social disconnection creates many problems.

This concludes the topic:

what are the advantages and disadvantages of internet?


Services Of Internet

SERVICES PROVIDED BY INTERNET

Important services provided by internet are as the following:

1. THE WORLD WIDE WEB

This is also called web or www or 3w. The collection of all web pages in all web sites on Internet is called www. These web pages provide us information in the form of text, pictures, audio and video formats etc.

2. E-MAIL

E-mail stands for electronic mail. It is the most popular, cheap, easy and fastest mailing service. We can send and receive messages on internet with in seconds or minutes.

3. EMAIL DISCUSSION GROUPS

These are used to discuss different topics with other people by email.

4. NEWSGROUPS

Newsgroups are discussion groups on internet. They are used for free exchange of information. A user sends a message to the news group site. Other users read this message from this site and reply. Newsgroups are provided by special computers called news servers.

5. ECOMMERCE

It stands for Electronic Commerce. E-commerce means to carry out business dealings by internet. Examples of Ecommerce include:
Online Banking, Online shopping and online education etc.

6. FTP

FTP stands for file transfer protocol. It is used to transfer files on internet easily and quickly. Audio, video, graphics and data files can be uploaded and downloaded using FTP.

7. TELNET

This program is used to access a remote computer on internet. You can access data and files from connected computer by Telnet. Telnet may also provide you a user interface on screen. You will give commands to remote computer by this user interface.

8. CHAT

It is the most popular services by which two or more users can live chat with each other. We can chat by text or audio or video. Voice chat is just like talking on telephone. Messenger software like Yahoo messenger or MSN messenger is used for chatting.

9. GOPHER

A gopher on the Internet is a system for users to search for files via menus or directory structures. It uses plain English names and is text based only.

Saturday, September 17, 2011

Explain Internet and History of Internet

INTERNET



Internet is the network of networks around the world. It is made up of thousands of smaller networks. It is a global communication system. We can send and receive information from a city or country to another through Internet.

Main components of Internet are computers, communication media and modem etc. Modem is used to send and receive information though telephone lines.
   

Internet provides following main facilities:

               ·    E- mail
               ·    Chat
               ·    Searching jobs
               ·    Advertising for business
               ·    E-commerce
               ·    Searching information

To use Internet we must have

 ·    suitable computer
 ·    telephone line
 ·    modem
 ·    web browser (for example, internet explorer)
 ·    Internet connection or scratch card of an ISP

HISTORY OF INTERNET

1) ARPANET  

The seeds of internet were planted in 1969 by Advanced Research Projects Agency (ARPA) of US department of Defense. ARPA began to connect computers at different universities and defense contractors. This network was named ARPANET. The goal of ARPANET was to create a large network using telephone lines that could survive a nuclear attack or earthquake. Secondly, It also linked researchers at remote places to share the research work.
ARPANET continued to develop through the 70s. Before the 80s there were fewer than 100 sites on the e Internet.

2) NSFNET

In 80s US defense department stopped funding the ARPANET. In the mid-80s the National Science Foundation (NSF) joined the project. NSF developed the network to connect supercomputer centers in the US.
ARPANET was unable to handle rapidly increasing load of users. So NSF developed a new and higher capacity network called NSFNET.

3) INTERNET

At this point many colleges and universities were encouraged to connect to the network. The number of sites began to increase rapidly. There were more than 100,000 sites in 1989. Similar networks were established in other countries in the world. The ARPANET, NSFNET and other networks were interconnected. The process of connecting different networks together is called INTERNETWORKING. So this world wide network of networks was named as INTERNET.

4) Internet Backbones

NSFNET provided internet connections for academic research. But NSFNET did not permit users to do private business on internet. Therefore, many telecommunication companies created their own network backbones. Network back bones consist of high-speed data lines to carry huge volume of traffic. Local networks connect to these backbones.
In 1990 ARPANET was shut down. In 1995, government funding for NSFNET was discontinued. So commercial internet back bone services replaced them.

5) Business on Internet

In the early 90s businesses were allowed on the internet.

6) Internet Service providers

Since 1996, most of the internet traffic is carried by independent Internet Service Providers. Now at a very low cost, computers of offices, homes, institutes, hotels and net cafes etc can be connected to internet.

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