INTERNET
Internet is an connection between several computers of different types belonging to various network across the world. It is a network of the networks. Million of people use internet to search and share information and ideas etc. The internet is an immensely complex combination of thousands of technologies and dozens of services used by the people around the world each day. Every network and every computer in the network exchange information according to certain rules called protocols. These different computers and networks are united with common threads of two protocols i.e., Internet Protocol (IP) and Transmission Control Protocols (TCP).
INTERNET CHARACTERISTICS
⇾ A Complex Network :- With the simplified network of networks that comprises over 150 millions computers.
⇾ Disorganize :- Internet can be cumbersome and confusing even for experienced users.
⇾ A Decentralized System :- Million of individuals networks and over 140 millions individuals computers connected throughout the world.
⇾ Composed of Billion of Files :- Files pertaining to thousands of subjects, disciplines, and professions are available in different file formats.
⇾ Widely Used :- More than 147 million people use the internet over 40 million of whom use it daily.
⇾Internet Scope :- It is across by people in approx 140 countries; people in over 155 countries use the internet for e-mail purpose.
⇾ Expanding Exponentially :- growing at the rate of 12% per month.
ELEMENTS OF THE INTERNET
• Client PC :- These are the computer that requests information from sources. If your personal computer has access to internet it is then categorized as a client computer.
• Server Computer :- A server is computer that holds the files for one or more websites. These are relatively powerful computers with a full time internet connection and can provide data to multiple clients computers simultaneously.
• Networks :- These are composed of one or more server computers and multiple client PC.
• Nodes :- Nodes is generic term used to describe a client, server or network.
INTERNET CONNECTIVITY
⇾ ISP (Internet Service Provider) :- ISP is an organisation that provides internet and access to the services provided on the internet. It is company such as AT & T (American Telephone & Telegraph), Verizon, Comcost
or Brighthouse, they provides internet access to companies, families and even mobile users. ISP use fibers optics, satellites, copper wire and other forms to provide internet access to it's customer.
ISP Types -------
• Access Providers :- They provide access to internet through telephone lines, cables, WiFi, or fiber optics.
•Hosting ISP :- Hosting ISP offers E-mail and other web hosting services such as virtual machines, clouds etc.
• Virtual ISP :- Such ISPs offers internet access via other ISP services.
• Free ISP :- They do not charge for internet services .
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