The Internet

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  • The Internet
    • " a group of networks joined together with smaller networks"
      • Boolean Searches - saves time and narrows down searches. AND, OR, NOT. Exact searches  with the use of ". a web crawler automatically browses webpages in a systematic manner to produce up to date information
    • Bandwidth - a measure of the speed at which data can be transferred along a communication channel
    • Online Databases - uses a network rather than a standalone machine so all can access the same database which avoids data duplication as data is constantly modified so it is always up t date
    • Dialup Modem - slow connection to the internet with limited uses.
      • The modem  changes the digital signal into sounds and then back to digital at the other end of the line
        • + Only pay for the internet you actually use
        • - Slow   - Cant use the phone at the same time
    • Broadband - fast connection to the internet with fast downloads
      • + fast downloads +no time wasted waiting + cheap phone calls +doesn't tie up phone lines
      • - can be expensive -might not be available in some areas
    • Mobile Access - devices that offer mobile access to the internet (phones, laptops)
      • +Can work more effectively +can make fast changes to plans +possible to work from anywhere
      • -Expensive -never feel like you're away from your phone -security problems
    • File Transfer Protocol - a standard internet protocol providing a simple way of transferring files between computers on the internet.
      • Used by companies to distribute information to their customers. IT CAN TRANSFER LARGE FILES
    • Electronic Data Interchange - companies can automatically exchange data
      • Used by large retailers to order and pay for goods - you can access info  by URL, Hyperlink, Search Engine
    • E-commerce - the use of the internet to purchase goods.
      • = trained staff =secure method of payment with encryption =catalogue of stock =database of customer orders =search facility
      • Customers +order 24/7  +no traveling +more choice +more savings Businesses +global market +access customers 24/7 +lower start up costs +fewer staff needed +easily updated
      • Customers -more hassle -cant asses quality -Fraud -Security Businesses -network downtime is expensive -increased competition -reliance on 3rd party delivery -Delivery increasing costs of goods
    • How a search engine works - the user types in a key word, a list of results appear with the webpage title, details of the page and its URL. Many are ordered by relevance.
      • Boolean Searches - saves time and narrows down searches. AND, OR, NOT. Exact searches  with the use of ". a web crawler automatically browses webpages in a systematic manner to produce up to date information
      • Relevant? Accurate? Biased? Reliable? Precise? Appropriate?

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