Peer to peer networks computers did not wake up one

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Peer-to-Peer Networks Computers did not wake up one day and hooked up to the Internet. The first practical networks for personal computers were peer-to-peer networks. A peer- to-peer network is a small group of computers with a common purpose all connected to each other. This small network allowed a single printer to be used by any computer on the network and computers could also share information. These types of networks were frequently called Local Area Networks or LANs. Initially, the networks were true peer-to-peer networks. This means that every computer on the network was equal. All computers were personal computer work stations. Chapter I Introduction to Computer Science Page 35
Cient-Server Networks Peer-to-peer networks do not work well when networks get large. Special, dedicated computers, called servers, were needed. A server is a specialty computer that is connected to the LAN for one or more purposes. Servers can be used for printing, logon authentications, permanent data storage, web site management and communication. Many businesses would have multiple servers set up in such a manner that some servers exist for the purpose of backing up the primary server. Using backup systems, tape storage or other backup means insured computer reliability in case of computer failure. The Department Of Defense Networking Role It may come as a shock to you, but the Internet was not created so that teenagers could play video games and download music. The Internet has its origins in the "Cold War." If you do not know what the "Cold War" is ask your Social Studies teacher, your parents or any old person over 30. During the Cold War there was a major concern about the country being paralyzed by a direct nuclear hit on the Pentagon. It used to be that all military communications traveled through the Pentagon. If some enemy force could knock out the Pentagon, the rest of the military establishment communication would be lost. A means of communication had to be created that was capable to keep working regardless of damage created anywhere. This was the birth of the Internet. The Internet has no central location where all the control computers are located. Any part of the Internet can be damaged and all information will then travel around the damaged area. The Modern Internet Students often think that the Internet is free. Well that would be lovely, but billions of dollars are invested in networking equipment that needs to be paid in some fashion. Computers all over the world are first connected to computers within their own business or school. Normally, businesses and schools have a series of LANs that all connect into a large network called an Intranet . An Page 36 Exposure Java 2009, PreAPCS Edition 08-09-09
Intranet behaves like the Internet on a local business level. This promotes security, speed and saves money.

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