Tuesday, January 29, 2019

Effects of Internet


Positive & Negative Effect of Internet
The Internet is greatly affecting our society. These affects are both positive and negative. Following are some important effects of the Internet on the society:
Positive Effects
The positive effects of the Internet of the society are as follows:
  • Globalization

Internet has converted this world into a global village. People are connected with one another using the Internet and related technologies. It has provided more opportunities of interaction. It also enables people to understand the views of one another.
  • Flow of Information

Internet contains information on all types of topics. People can search information on any topic. Search engines are used to search information on Internet. Easy access to information has enabled people to be informed.
  • Better Understanding

Internet is an easy way of communication among people. They can exchange their views. It has created better understanding. People can understand the views and thinking of one another. It helps in creating harmony and peace in the world.
  • Comfort in Life

The use of Internet has provided many comforts for society. People can perform their duties easily. They can sell and buy sell and buy sell and buy goods online. They can run their business using Internet.
  • Knowledge

Internet is a source of huge information. People can get information from websites. They can interact with different people, scholars and learned persons to get knowledge.
Negative Effects
Some negative effects of Internet on the society are as follows:
  • Social Cutoff

Many people spend a lot of time on the Internet. It affects the social interaction with the people. 
  • Immorality

Internet contains many immoral websites. The websites contains such material that is against the moral values of society. These websites damage the character of young people.
  • Wastage of Time

Many people use Internet without any positive purpose. The young people waste their time n chatting. It affect their performance and makes them inefficient.

News Group


News Groups.
A newsgroup is a discussion group on the Internet. People exchange information on a vast range of topics such as news, business, science and computer. A user sends message to the newsgroup to participate in discussion. Other users in the newsgroup read and reply to the message.
A software is required to obtain articles from news server. A news server is a host computer that exchanges articles with other server on the Internet. These servers use Network News Transfer Protocol (NNTP) to communicate. The users have to subscribe on a news group to view articles on a specific topic.

Search Engine


What is search engine?
Search engine is a website that provides the facility to find the required websites on a particular topic. A user can search any topic on Internet using search engines. Internet contains a lot of information. A large number of websites about different topics are available. A user cannot remember all websites. He can search different websites using search engines.
Search engines contains the record of many websites. It searches the required websites and display them to the user. Search engines are very powerful tools for finding information.
Searching Information using Search Engine.
Keywords are used to search the required information from search engine. Keyword is a word or set of words that is related to the topic being searched. The keyword is typed in double quotation if it consists of two or more words.
For example, the following keywords can be used to search information about Pakistan universities:
“Pakistani Universities”                                  Universities in Pakistan”
Most Popular Search Engines are followings:
Google                        http://www.google.com
Yahoo                         http://www.yahoo.com
Infoseek                      http://www.infoseek.com
Lycos                          http://www.lycos.com
Altavista                     http://www.altavista.digital.com
Netscape                     http://www.netscape.com
Bing                            http://www.bing.com
Ask                             http://www.ask.com
Excite                         http://www.excite.com

Monday, January 28, 2019

URL & Website


Different between URL & Website
URL: URL stand for Uniform Resource Locator. The URL is the web address for any given web document. Every web document has a unique URL.
Website: A collection of related web pages is called website. Each website has a unique web address. It contain text, graphics sound and video etc.

ISP


ISP
ISP stands for internet service provider. It is a company that provides internet connections. ISP also provides the facilities of email. Different ISPs in Pakistan are  PTCL, Word Call, Comsats.

Disadvantage of email


Disadvantage of Email
These are following
  • Junk Email:

Junk email is unwanted email. It is also known as spam. A person may send such email that the receiver does not want to read. A large number of junk emails may fill the space of email account.
  • Possible Delay:

Email is read when the user connects to the internet and checks email account. An urgent message may be ignored or delayed if a person does not check his email account soon.
  • Lack of Privacy:

Email does not provide high privacy. An email passes from one computer system to another through different networks. The system administrator of junk emails or a hacker can read the contents of emails.
  • No Emotions:

An email message cannot express emotions properly. The receiver cannot view the facial expression or voice of the sender.
  • Spreading of Virus:

Most of the viruses are spread through email messages. Virus can spread if the user opens an email containing a virus.
  • Communication Problems:

Email may not be delivered successfully due to communication errors.

Email


Write the note an Email
Email:
Email stands for Electronic Mail. Email is the exchange of messages and files through Internet. Message can be in the form of graphics, sounds, video clips or simple text. It is a fast way of sending messages anywhere in the world in a very short time.
The sender and receiver may be sitting in the same building or anywhere in the world. One email message can be sent to multiple recipients. Email facility is provided by many internet Service providers or specialized websites. Yahoo, Hotmail and Gmail are some popular examples of email providing websites.
Working of Email:
An email program is used to create, send and receive emails. It is also known as email client. When the user sends an email message, the computer connect to an email server and transmits a copy of the message to that server. Email server is a host computer on the internet that is used to send and receive emails. The email server receives the message and finds out the email server where that email is to be sent. It connects to that server and transmits another copy of the message.
Email Attachment:
An email message can also contain attachments. Attachment is a process of sending connecting  files with email message. Any type of file can be attached to email such as documents, spreadsheets, audio and video etc. MIME is an internet protocol that supports email attachments. It stands for Multipurpose Internet Mail Extension. Different websites provides different file size that can be attached with an email message. Yahoo provides attachment size of 10MB.