АкушерствоАнатомияАнестезиологияВакцинопрофилактикаВалеологияВетеринарияГигиенаЗаболеванияИммунологияКардиологияНеврологияНефрологияОнкологияОториноларингологияОфтальмологияПаразитологияПедиатрияПервая помощьПсихиатрияПульмонологияРеанимацияРевматологияСтоматологияТерапияТоксикологияТравматологияУрологияФармакологияФармацевтикаФизиотерапияФтизиатрияХирургияЭндокринологияЭпидемиология

What is the Internet?

Imagine a room filled with many spiders, each spinning its own web. The webs are so interconnected that the spiders can travel freely within this maze. You now have a simplified view of the Internet – a global collection of many different types of computers and computer network that are linked together. Just as a telephone enables you to talk to someone on the other side of the earth who also has a phone, the Internet enables a person to sit at his computer and exchange information with other computers and computer users anyplace in the world.

Some refer to the Internet as the information superhighway. Just as a road allows travel trough different areas of a country, so the Internet allows information to flow through many different interconnected computer networks. As messages travel, each network that is reached contains information that assists in connecting to the adjacent network. The final destination may be in a different city or country.

Each network can “speak” with its neighbor network by means of a common set of rules created by the Internet designers. Worldwide, how many networks are connected? Some estimates say over 30.000. According to recent surveys, these networks connect over 10.000.000 computers and some 30.000.000 users throughout the world. It is estimated that the number of connected computers is doubling each years.

What can people locate on the Internet? It offers a rapidly growing collection of information, with topics ranging from medicine to science and technology. It feature exhaustive material on the arts as well as research material for students and coverage of recreation, entertainment, sports, shopping, and employment opportunities. The Internet provides access to almanacs, dictionaries, encyclopedias, and maps.

Дата добавления: 2015-09-18 | Просмотры: 607 | Нарушение авторских прав