Lesson 10 - Data Exchange 2

Description

Mind Map on Lesson 10 - Data Exchange 2, created by Ellen Greenough on 06/21/2014.
Ellen Greenough
Mind Map by Ellen Greenough, updated more than 1 year ago
Ellen Greenough
Created by Ellen Greenough almost 11 years ago
21
1

Resource summary

Lesson 10 - Data Exchange 2
  1. Serial Transmissions
    1. In serial transmission, bits are transmitted one at a time over a single wire/channel. This reduces the cost of the cable, but gives a slower rate of data transfer. There is also some additional complexity, as bytes have to be disassembled into individual bits for transmissions and then reassembled after receipt. Serial transmissions can can be used over large distances.
    2. Parallel Transmissions
      1. In parallel transmission, a number of bits of data are transmitted simultaneous over an equal number of wires/channels. This allows the bits in a whole byte of information to be transmitted together. It has a short range, with an absolute maximum of around 5 metres. Parallel transmission used to be popular for connecting printers to computers but it is rarely used these days in computing because of the cost and limited range.
      2. Bi-directional Transmission
        1. It has several meanings within data communication, but its essentially about transmitting in both directions. Most recently the term has been applied to fibre optics. Using the current technology, light passes in one direction only, so you have to add extra fibres to the bundle to carry a signal in the opposite direction.
        2. Client Side Processing
          1. Client side processing is the use of a scripting language to create code on web pages which provide interactivity. An example of this is a rollover action; this is where some code is triggered when your mouse is moved over a particular part of the web page.
            1. :) Speed - the interaction may be faster once the code has been downloaded with the page, Security - its more secure as the entire action takes place in the downloaded page and nothing comes from the browser , which could cause corruption or security problems.
              1. :( Its browser specific - not all scripts work the same way on all browsers, so you may have to create different versions depending on the browsers used. Computer Speed - it can be affected by the speed of your own computer. As all the activity is taking place on a downloaded web page, the speed of processing will depend on your computer system. If the processing is complex or resource hungry, it may run slowly or cause other programs to run slowly on your system.
              2. Server-Side Processing
                1. Involves the use of scripts which reside and are run on another computer on the internet. Information is submitted to a server which processes it to provide results in the form of a web page. A good example of server-side processing is the submission of a search through a search engine. The search engine matches the word or phrase against an index of website content on the web server using scripts.
                  1. :) Efficiency - complex code may run more efficiently, as it does not have to be downloaded on to the user's computer, Browser independent do therefore can be run on any web browser on the web server, the speed of your own computer is only significant for the downloading of the web pages. All of the other processing takes place on a higher resourced and speedy server.
                    1. :( Security - the exchange of data over the network may present security risks, Overloading - a server needs to be able to cope with large volumes of users.
                    2. USB
                      1. Universal serial bus - a serial transmission method which was introduced to make many connections to Universal serial bus, a serial transmission method which was introduced to make many connections to a computer look the same. Nowadays, USB id used in mobiles, memory sticks and MP3 players. Also, provide power to some devices.
                      Show full summary Hide full summary

                      Similar

                      English Vocabulary
                      Niat Habtemariam
                      Cell Structure
                      daniel.praecox
                      IMPERFECT TENSE - French
                      T W
                      A-Level Physics: Course Overview
                      cian.buckley+1
                      Basic Physics Concepts
                      Andrea Leyden
                      Biology AQA 3.1.3 Osmosis and Diffusion
                      evie.daines
                      Know the principles of electricity
                      Vito Martino
                      English Language Terms
                      ekimlauretta
                      GCSE French - Parts of the Body
                      Abby B
                      GCSE Biology B2 (OCR)
                      Usman Rauf
                      “The knower’s perspective is essential in the pursuit of knowledge.” To what extent do you agree with this statement?
                      Lucia Rocha Mejia