Internet

The internet

The internet is a network that links computer networks all computers over the world using The Internet is used to send information quickly between computers around the world. It has millions of smaller domestic, academic, business, and government networks and websites, which together carry many different kinds of information and services. So in other words, the Internet is a network of networks.
No one owns Internet, although several organizations the world over collaborate in its functioning and development. The high-speed, fiber-optic cables (called backbones) through which the bulk of the Internet data travels are owned by telephone companies in their respective countries. 

World wide web

The World Wide Web is a network of computers that serve webpages. The World Wide Web is a major component of the Internet, along with email, usenet, ftp, and some other minor protocols. The term "world wide" refers to the global nature of the World Wide Web, and the term "web" refers to the interlinking of documents by means of hypertext. In simple terms, this means that documents on the Web (or WWW for short) can reference, or link to, other documents by simply stating on which machine they reside, and where on that machine.

TCP/IP

Standard Internet communications protocols that allow digital computers to communicate over long distances. The Internet is a packet-switched network, in which information is broken down into small packets, sent individually over many different routes at the same time, and then reassembled at the receiving end. TCP is the component that collects and reassembles the packets of data, while IP is responsible for making sure the packets are sent to the right destination. TCP/IP was developed in the 1970s and adopted as the protocol standard for ARPANET (the predecessor to the Internet) in 1983.

Redundancy

The idea that the internet will never go as it is hosted everywhere and is all around us and hosted by anyone shared.

 

 

Digital and Analogue internet 

A dial-up modem converts digital signals from a computer to analogue signals that are then sent down the telephone line. A modem on the other end converts the analogue signal back to a digital signal the computer can understand.

The maximum theoretical connection speed is 56Kbps. Dial-up is very slow by today’s standards and in real world use will typically result in a download speed of roughly 5KBps.
Phone calls cannot be made whilst connected to the Internet.

ISDN

An ISDN (Integrated Services Digital Network) capable phone line can provide connection speeds of up to 128Kbps (dual channel) using a terminal adapter often referred to as an ISDN modem. The terminal adaptor removes the need to convert digital signals to analogue signals before they’re sent down the telephone line, this results in a more reliable Internet connection.

ADSL

ADSL (Asymmetric Digital Subscriber Line) provides connection speeds of up to 24Mbps and uses a telephone line to receive and transmit data.

 

Cable

Cable companies do not use traditional telephone lines to provide broadband Internet access. They have their own network, a combination of co-axial copper cable and fibre optic cable.
With their purposefully built infrastructure cable companies are able to provide speeds of up to 50Mbps - considerably faster than the highest available ADSL speed (24Mbps).
The making and receiving of phone calls is not affected because the telephone line is not used.