The Internet - Distributed Computing & Finding Info Online
- Created by: lauren778
- Created on: 23-02-18 14:09
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- The Internet
- Finding Info Online
- URLs
- The address for a webpage
- Web Crawler
- Program that automaticallybrowses webpages
- Returns data about the web pages so they can be indexed
- Often by a search engine to enable fast, accurate searches
- Can be used to check websites for broken links
- Boolean Searches
- Combine words and phrases using AND OR NOT and NEAR to limit, widen or define search
- Hyperlinks
- An area of a webpage used to move from one area of interest to another
- URLs
- Distributed Computing
- Definition
- A series of computers are networked together, each working on solving the same problem, sharing processing, storage and bandwidth required.
- Example
- SETI - Search for Extra Terrestrial Intelligence
- Uses lots of radio telescopes to scan for signals from outer space.
- SETI - Search for Extra Terrestrial Intelligence
- Advantages
- Reduces cost - expensive powerful computer not needed
- Send work to any computer in the world
- Improved performance as each computer works on part of data
- To gain more processing power, add more computers
- Disadvantages
- Security - data spread across locations
- Heavy reliance on networks
- Increased costs due to expensive communication lines
- Definition
- Finding Info Online
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