1. INTERNET

2. WHAT IS INTERNET
Internet is an international network of networks that connects computers worldwide. It connects universities, research facilities, governmental organizations allowing them to access, share and exchange information.

3. Connecting to internet
To get connected to the internet you need a communication links between your computer and a host computer and hardware and software. A host computer is a computer that is already connected to the internet. Access to a host computer is made available through an internet service provider (ISP).

4. WAY TO CONNECT TO INTERNET
DIAL-UP: YOUR COMPUTER DIALS A PHONE NUMBER TO CONNECT YOU TO YOUR ISP USING A TELEPHONE LINE. DEDICATED CONNECTION: THIS MEANS THAT YOU HAVE A PERMANENT CONNECTION AND ARE PART OF THE INTERNET AT ALL TIMES. IN MANY COUNTRIES. TV CABLE COMPANIES INSTALL A SINGLE CABLE TO PROVIDE CABLE TV, TELEPHONE AND INTERNET SERVICES TO CUSTOMERS.

5. TRANSMISSION CONTROL PROTOCOL/INTERNET PROTOCOL
TCP/IP IS A SET OF PROTOCOLS USED TO TRANSFER DATA FROM ONE COMPUTER TO ANOTHER OVER THE INTERNET.A PROTOCOL IS A SET OF RULES THAT DEFINES HOW COMPUTERS INTERACT OR COMMUNICATE WITH EACH OTHER.

6. WORLD WIDE WEB
The Internet is a world-wide web that has grown and evolved from an experimental network (ARPANet) created by the US military back in the 1960s. Over the years, as more and more computers and networks have connected to this network, it has grown into the Internet that we know.

7. BROWSERS
A web browser is a software that lets you access the information available on the web. Popular web browsers include: Microsoft internet explorer. Mozilla firefox.

8. Internet addresses
Each computer on the internet has a unique address that identifies it. This unique address is a number called the IP address ( internet protocol address)

9. Web addresses or URLs
The IP addresses used by software are difficult for humans to remember so URLs (uniform resource locators) or web addresses are used instead. Every web address is unique and is constructed like this.

10. Type of resource
It identifies the type of resource. There are several different types for example identifies a web page and mailto:// identifies an address.

11. Host computer
It is the name of the host computer or web server. This must be unique within the domain.

12. Domain
It identifies the type of organisation that owns the website. There are several different types of domains, for example. .com identifies an international commercial organisation. .co.uk identifies a UK- based commercial organisation

13. ac. uk identifies a UK based university or other academic institution
.ac.uk identifies a UK based university or other academic institution. .org.uk identifies a UK based non- commercial organisation. e.g. yahoo.com

14. What can you do on internet
View web pages on the WWW (World-Wide Web)
Sending and receiving   messages
Sharing files
Communicating using voice (VOIP) and video (video-conferencing)
Playing multi-player games
Listening to streamed music or watching streamed video

15. Intranet
An intranet is the name given to a private network that provides similar services to The Internet: , messaging, web pages, etc.  However, these services are only for the users of the intranet – they are private, not public (unlike Internet services which are generally public). Businesses and other organisations often have intranets for use by their employees. 

16. Typical uses of an intranet would be: Viewing internal web pages (e. g
Typical uses of an intranet would be:  Viewing internal web pages (e.g. company calendars, etc.)
Internal  and instant-messaging between workers
Sharing of internal documents

17.
is a system that allows messages to be sent and received by computers. is the most common form of electronic communication. messages are text-based, but other types of file can also be sent as ‘attachments’. s that are received wait in a user's inbox until the user is ready to read them. (Unlike a telephone call, the user is free to ignore s until they have time to deal with them.)

18. Sending an

19. The address(es) of the person who the message is for
An message usually has the following parts: To
The address(es) of the person who the message is for
Subject
A short sentance describing what the message is about
Message
The text of the message. This can be as long as you like

20. The address(es) of people to copy the e-mail to (Carbon Copy)
An may also include the following parts: CC
The address(es) of people to copy the to (Carbon Copy)
BCC
The address(es) of people to copy the to without anyone else knowing (Blind Carbon Copy)
Attachments
Files linked to the message (images, documents, etc.)

22. For an message to be sent and received, the following must be in place: server: this is a computer on the internet that receives incoming messages and delivers outgoing messages. It allocates a certain amount of storage to hold mail for registered users. client: this is a program that enables you to read and compose messages and to send and access from the server, e.g. Microsoft outlook.

23. Storing an
Do it yourself.