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The Joy of Data (COMMUNICATING DIGITAL CONTENT (NETWORK (:warning: LAN …
The Joy of Data
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INTERNET OF THINGS
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Internet of Things(IoT)
The Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.
A thing, in the Internet of Things, can be a person with a heart monitor implant, a farm animal with a biochip transponder, an automobile that has built-in sensors to alert the driver when tire pressure is low -- or any other natural or man-made object that can be assigned an IP address and provided with the ability to transfer data over a network.
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Internet(Ch 1.1)
The Internet is a worldwide collection of computer networks that connects millions of businesses, government agencies, educational institutions, and individuals
DIGITAL SECURITY,PRIVACY AND ETHICS
INFORMATION PRIVACY
right of individuals and companies to deny or restrict the collection, use, and dissemination of information about them
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ETHICS AND SECURITY
Technology ethics
moral guidelines that govern the use of computers, mobile devices, information systems, and related technologies
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CLOCK STORAGE
- Incredibly simple code.
- First detected , then sampled.
- Each point is assigned as ones and zeros.
- The resulting long digits can be send down the wire with the zeros as brief low-voltage signals and ones as brief bursts of high voltage.
- From this code , the original audio can be cleanly reconstructed and regenerated at the other end.
- ETHERNET : is a network standard that specifies no central computer or device on the network (nodes) should control when data can be transmitted.
- TOKEN RING STANDARDS : specifies that computers and devices on the network share or pass a special signal (token)
- TCP/IP : network protocol that defines how messages (data) are routed from one end of a network to another
- Step 1 :check: : Using a browser, you request a webpage on a web server be displayed on your computer screen.
- Step 2 :check: : Your computer uses TCP/IP standard to establish a connection with the web server that stores the requested webpage, divides the webpage into packets, provide an address for each packets, and reassemble the webpage once it arrives at your computer. Routers send the packets over the Internet from the web server to your computer.
- Step 3 :check: : The Ethernet standard control how devices (adapter cards, routers, modems , etc.) share access to the media (cables and lines) and how devices transmit data over the transmission media.
- The data received is broken up into over 1000 data packets
- each packets is then stamped with here it was from and where to go, which routers check to keep the packets moving to its destination.
- finding a way of sharing data between computers - a prototype network.
- moving a file or programs and run a program remotely on another computer efficiently. (in which telephone networks are not suitable)
- sending encoded files using telephone networks was engaged for as long as the transmission took (during pre-digital era)
- Hence, Davies laying high-bandwidth data cables before instituting a new way of moving data around network.
