Topic: Internet

Subject: Computer & IT

1st Year B.Sc in nursing.

What is Internet : Internet means of connecting a computer to any other computer anywhere in the world via dedicated routers and servers. When two computers are connected over the internet, they can send and receive all kinds of information such as text, graphics, voice and computer programs.

Uses of Internet Internet is used for different purposes by different people. Some uses of the Internet are listed below:

  • E-Commerce (auction, buying, selling products etc.)
  • Research (on-line journals, magazines, information etc.)
  • Education (e-learning courses, virtual classroom, distance learning)
  • E-Governance (online filing of application (Income Tax), on-line application forms etc.)
  • On-line ticket booking (airplane tickets, rail tickets, cinema hall tickets etc.)
  • On-line payments (credit card payments etc.)
  • Video conferencing
  • Exchange of views, music, files, mails, folders, data, information etc.
  • Outsourcing jobs (work flow software)
  • Social networking (sites like facebook, twitter)
  • E-Telephony (sites like skype)

Web Browsers : Internet Explorer – Built into windows

Netscape –

Opera

Mozilla Firefox
Browser– A  software  program  that  allows  Internet  documents  (like  web pages) to  be viewed,  also  called  a  Web  Browser.Domain  Name–A  unique  name  that  identifies  a  specific  computer  on  the  Internet.

Download–A  term  for  transferring  software  or  other  files  from  one  computer  to  another.

Email–Electronic  Mail  –Messages  sent  from  one  specific  user  to  another  using  the Internet.

Email  address–The  way  a  specific  user  is  identified  so  that  they  may  receive  email.   An  email  address  can  be  identified  by  the  “@”  sign.    E.g. Support@seniorconnects.org

Home  Page–The  first  page  of  a  Website,  similar  to  a  table  of  contents.

HTML–Hyper Text  Markup  Language-­‐A  computer  language  used  to  make  hypertext documents  that  are  sent  via  the  World  Wide  Web  and  viewed  using  a  Browser.

HTTP–Hyper Text  Transfer  Protocol  –The  way  that  hypertext  documents  are  transferred over  the  Internet.

Hypertext– A  way  of  presenting  information  that  allows  words,  pictures,  sounds,  and  actions  to  be  interlinked  so  that  you  may  jump  between  them  however  you  choose.

Link–A  word,  phrase,  or  image  that  allows  you  to  jump  to  another  document  on  the World  Wide  Web. Search  Engine–A website  that  indexes  and  allows  searching  of  information  gathered  from the  Internet. Google  is  an  example  of  this.

URL–Uniform  Resource  Locator  –The  entire  address  for  a  piece  of  information  of  the  Internet.    E.g. www.google.com

Webpage–A hypertext  document  available  on  the  World  Wide  Web.

Website–A collection  of  web pages.

World  Wide  Web–A  collection  of  resources  available  on  the  Internet  using  a  web  browser.

Cyberspace–The  world  of  computer  networks.

What is the difference between Cc and Bcc?

Cc stands for carbon copy which means that whose address appears after the Cc: header would receive a copy of the message. Also, the Cc header would also appear inside the header of the received message.

Bcc stands for blind carbon copy which is similar to that of Cc except that the Email address of the recipients specified in this field do not appear in the received message header and the recipients in the To or Cc fields will not know that a copy sent to these address.
What is hyperlink? Explain it  with example ?

http is the Hypertext Transfer Protocol

so a hyperlink is a link that directs to a specific place in a hypertext/hypermedia document.
In computing, a hyperlink is a reference or navigation element in a document to another section of the same document or to another document that may be on or part of a (different) domain.
If you were to actually move you fingers you would see that there are plenty of examples, just google “hyperlink example”.
What is Web Address ? An internet address of a website, file, or document in the general formathttp://www.address/directories/filenam

 Every computer connected to the internet has its unique web address, without which it cannot be reached by other computers. Also called universal resource locator or Uniform Resource Locator (URL).

File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host to another host over a TCP-based network, such as the Internet.

FTP is built on a client-server architecture and uses separate control and data connections between the client and the server. FTP users may authenticate themselves using a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that hides (encrypts) the username and password, and encrypts the content, FTP is often secured with SSL/TLS (“FTPS”). SSH File Transfer Protocol (“SFTP”) is sometimes also used instead, but is technologically different.

Download / Upload

Definition: A download involves the receipt of a file copied from a remote network location. Often, a person downloads files to their personal computer from a remote server computer. In Microsoft email networks, for example, people download their email from an Exchange server to their Outlook client.

An upload involves sending a copy of a file to a remote network location. For example, Web publishers upload files to their Web server.

Sending files across a computer network does not necessarily constitute an upload or a download. The terms are more commonly used in client/server networking than in peer-to-peer networking.

Prepared By : Md. Tariqul Islam

B.Sc (Hons.), M.Sc

Lecturer

Computer & IT  

 

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