It is estimated that in 1993 the Internet carried only 1% of the information flowing through two-way telecommunication. By 2000 this figure had grown to 51%, and by 2007 more than 97% of all telecommunicated information was carried over the Internet. Many people use the World Wide Web to access news, weather and sports reports, to plan and book vacations and to pursue their personal interests. People use chat, messaging and email to make and stay in touch with friends worldwide, sometimes in the same way as some previously had pen pals.

As user data is processed through the protocol stack, each abstraction layer adds encapsulation information at the sending host. Data is transmitted over the wire at the link level between hosts and routers. Intermediate relays update link encapsulation at each hop, and inspect the IP layer for routing purposes.


Whether it’s value-for-money, speed, customer service, or all three, the requirements you have will determine which broadband provider is likely the best one for you. Internet, a system architecture that has revolutionized communications and methods of commerce by allowing various computer networks around the world to interconnect. Sometimes referred to as a “network of networks,” the Internet emerged in the United States in the 1970s but did not become visible to the general public until the early 1990s. By 2020, approximately 4.5 billion people, or more than half of the world’s population, were estimated to have access to the Internet. An Internet blackout or outage can be caused by local signalling interruptions. Disruptions of submarine communications cables may cause blackouts or slowdowns to large areas, such as in the 2008 submarine cable disruption.

Men logged on more often, spent more time online, and were more likely to be broadband users, whereas women tended to make more use of opportunities to communicate . Men were more likely to use the Internet to pay bills, participate in auctions, and for recreation such as downloading music and videos. In addition, women watched more streaming content, whereas men downloaded more.

Energy Use

In 2011, academic researchers estimated the overall energy used by the Internet to be between 170 and 307 GW, less than two percent of the energy used by humanity. According to a non-peer reviewed study published in 2018 by The Shift Project , nearly 4% of global CO2 emissions could be attributed to global data transfer and the necessary infrastructure. The spread of low-cost Internet access in developing countries has opened up new possibilities for peer-to-peer charities, which allow individuals to contribute small amounts to charitable projects for other individuals.

The study looked at the top three to five carriers by market share in Bangladesh, Colombia, Ghana, India, Kenya, Nigeria, Peru and Philippines. Across the 181 plans examined, 13 per cent were offering zero-rated services. Another study, covering Ghana, Kenya, Nigeria and South Africa, found Facebook’s Free Basics and Wikipedia Zero to be the most commonly zero-rated content.

  • Users generally enter domain names (e.g. “”) instead of IP addresses because they are easier to remember, they are converted by the Domain Name System into IP addresses which are more efficient for routing purposes.
  • The ARPA projects and international working groups led to the development of various protocols and standards by which multiple separate networks could become a single network or “a network of networks”.
  • It uses the same Openreach networks as BT to deliver broadband to your home, and also offers ultrafast full fibre speeds.
  • The Internet may often be accessed from computers in libraries and Internet cafes.

Social networking services such as Facebook have created new ways to socialize and interact. Users of these sites are able to add a wide variety of information to pages, pursue common interests, and connect with others. It is also possible to find existing acquaintances, to allow communication among existing groups of people. Social networking services are also widely used by businesses and other organizations to promote their brands, to market to their customers and to encourage posts to “go viral”. “Black hat” social media techniques are also employed by some organizations, such as spam accounts and astroturfing.

Service Tiers

The low cost and nearly instantaneous sharing of ideas, knowledge, and skills have made collaborative work dramatically easier, with the help of collaborative software. Not only can a group cheaply communicate and share ideas but the wide reach of the Internet allows such groups more easily to form. An example of this is the free software movement, which has produced, among other things, Linux, Mozilla Firefox, and . Internet chat, whether using an IRC chat room, an instant messaging system, or a social networking service, allows colleagues to stay in touch in a very convenient way while working at their computers during the day.

Customer Service

Users generally enter domain names (e.g. “”) instead of IP addresses because they are easier to remember, they are converted by the Domain Name System into IP addresses which are more efficient for routing purposes. For locating individual computers on the network, the Internet provides IP addresses. IP addresses are used by the Internet infrastructure to direct internet packets to their destinations. IP addresses are generally assigned to equipment either automatically via DHCP, or are configured.