{"id":49,"date":"2020-11-03T00:19:01","date_gmt":"2020-11-03T00:19:01","guid":{"rendered":"http:\/\/learnlearn.uk\/igcsecs\/?page_id=49"},"modified":"2022-01-25T07:06:11","modified_gmt":"2022-01-25T07:06:11","slug":"data-transmission","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/igcsecs\/data-transmission\/","title":{"rendered":"Data Transmission"},"content":{"rendered":"<div class=\"responsive-tabs\">\n<h2 class=\"tabtitle\">Serial<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Serial Data Transmission<\/h3>\n<p>Serial transmission is where data is transmitted one bit at a time between devices. On wired networks data is sent along a single wire.<\/p>\n<p><a href=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/serial-optimised-small.gif\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-360 alignnone\" src=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/serial-optimised-small.gif\" alt=\"\" width=\"800\" height=\"190\" \/><\/a><\/p>\n<h4>Serial Transmission Examples<\/h4>\n<ul>\n<li>USB Devices<\/li>\n<li>Ethernet Cable Networks<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n\n<\/div><h2 class=\"tabtitle\">Parallel<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Parallel\u00a0Data Transmission<\/h3>\n<p>Parallel transmission is where multiple wires are used to transmit multiple bits of data at the same time. Once the data is received it is reassembled into the correct order at the receiving end.<\/p>\n<p><a href=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/parallel-optimized2.gif\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-362\" src=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/parallel-optimized2.gif\" alt=\"\" width=\"800\" height=\"307\" \/>#<\/a><\/p>\n<h4>Parallel\u00a0 Transmission Examples<\/h4>\n<ul>\n<li>Parallel Printers<\/li>\n<li>Parallel ATA Drives<\/li>\n<\/ul>\n\n<\/div><h2 class=\"tabtitle\">Serial vs Parallel<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Disadvantages of parallel<\/h3>\n<p>Although it is theoretically faster to transmit data using parallel transmission rather than serial, parallel has a couple of serious drawbacks.<\/p>\n<p><strong>Problem 1 &#8211; Data corruption<\/strong><\/p>\n<p><a href=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/parallel-problem.gif\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-369\" src=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/parallel-problem.gif\" alt=\"\" width=\"618\" height=\"307\" \/><\/a><\/p>\n<p>We data is transmitted using parallel transmission the data needs to be reassembled at the receiving end. If there any delays in transmission then the data will be reassembled in the wrong order. This problem increases in severity and likelihood as the distance between devices increases. This means that parallel transmission is only suitable for very short distances of up to a couple of metres.<\/p>\n<p><strong>Problem 2 &#8211; Cost<\/strong><\/p>\n<p>Parrallel wires cost more than serial wires due to the higher number of wires involved.<\/p>\n<p>In order to avoid these problems most modern devices communicate using serial transmission. In order to increase data transmission rates, data is sent me closely together using devices with higher clock speeds and transmission accuracy.<\/p>\n<h3>Serial Supremacy<\/h3>\n<p>Modern serial devices can now transmit data incredibly quickly:<\/p>\n<ul>\n<li>Ethernet cables : theoretical max &#8211; 1 Gbps<\/li>\n<li>USB: theoretical max &#8211; 10Gbps<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n\n<\/div><h2 class=\"tabtitle\">Simplex<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Simplex\u00a0Data Transmission<\/h3>\n<p>Simplex data transmission is where data is only sent in one direction.<\/p>\n<p><a href=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/serial-optimised-small.gif\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-360\" src=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/serial-optimised-small.gif\" alt=\"\" width=\"800\" height=\"190\" \/><\/a><\/p>\n<h4>Simplex Transmission Examples<\/h4>\n<ul>\n<li>Radio broadcasts<\/li>\n<li>Television broadcasts<\/li>\n<li>Television remote controls<\/li>\n<li>Older PS2 Keyboards \/ Mice<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><\/h3>\n<h4><\/h4>\n<p>&nbsp;<\/p>\n\n<\/div><h2 class=\"tabtitle\">Half Duplex<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Half Duplex\u00a0Data Transmission<\/h3>\n<p>Half duplex is where data is sent both ways but data is only sent in one direction at a time.<\/p>\n<p><a href=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/half-duplex-optimized.gif\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-365\" src=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/half-duplex-optimized.gif\" alt=\"\" width=\"800\" height=\"165\" \/><\/a><\/p>\n<h4>Half Duplex Transmission Examples<\/h4>\n<ul>\n<li>Wifi Routers<\/li>\n<li>Walkies Talkies<\/li>\n<li>Parallel Printers<\/li>\n<\/ul>\n<h4><\/h4>\n\n<\/div><h2 class=\"tabtitle\">Full Duplex<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Duplex \/ Full Duplex Data Transmission<\/h3>\n<p>Full duplex is where data is sent in both directions at the same time. If using wired transmission then 2 separate wires are used, one for sending and one for receiving. In fiber optic networks it is possible to send data along a single wire in both directions at the same time.<\/p>\n<h3><a href=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/full-duplex.gif\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-367\" src=\"https:\/\/learnlearn.uk\/igcsecs\/wp-content\/uploads\/sites\/23\/2020\/11\/full-duplex.gif\" alt=\"\" width=\"800\" height=\"185\" \/><\/a><\/h3>\n<p>&nbsp;<\/p>\n<h4>Full Duplex Transmission Examples<\/h4>\n<ul>\n<li>Ethernet<\/li>\n<li>Fiber Optic cables<\/li>\n<\/ul>\n\n<\/div><h2 class=\"tabtitle\">Quiz<\/h2>\n<div class=\"tabcontent\">\n\n<p>Quiz<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLScwx6NXjee6Tf_hlsIfeliTxeurrJ0-oerFd3l1lu8TSeADtQ\/viewform?embedded=true\" width=\"100%\" height=\"3000\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\">Loading\u2026<\/iframe><\/p>\n\n<\/div><h2 class=\"tabtitle\">Resources<\/h2>\n<div class=\"tabcontent\">\n\n<p><a href=\"https:\/\/docs.google.com\/presentation\/d\/159KPbT3ExoOmzhr1Hzip7rcV-1NPn_yYM3bPjifbOYc\/edit?usp=sharing\">Teacher presentation<\/a><\/p>\n<p><a href=\"https:\/\/quizizz.com\/admin\/quiz\/609cc982cec05f001d05c70e\/startV4\">Simplex vs duplex Quizziz<\/a><\/p>\n<p><a href=\"https:\/\/forms.gle\/3NPurDzYbJtWqV7t8\">Google Forms Quiz<\/a><\/p>\n<p>(need to add serial vs parallel questions)<\/p>\n<p><strong>Past Paper Questions<\/strong><\/p>\n<p><a href=\"https:\/\/pastpapers.papacambridge.com\/viewer\/caie\/cambridge-upper-secondary-igcse-computer-science-0478-2015-jun-0478-s15-qp-11-pdf\">0478\/11 Paper 1 Theory May\/June 2015 &#8211; Qn 1<\/a><\/p>\n<p><a href=\"https:\/\/pastpapers.papacambridge.com\/viewer\/caie\/cambridge-upper-secondary-igcse-computer-science-0478-2016-jun-0478-s16-qp-12-pdf\">0478\/12 &#8211; Paper 1 Theory May\/June 2016 Qn<\/a>6<\/p>\n<p><a href=\"https:\/\/pastpapers.papacambridge.com\/viewer\/caie\/cambridge-upper-secondary-igcse-computer-science-0478-2017-jun-0478-s17-qp-11-pdf\">0478\/11 &#8211; Paper 1 Theory May\/June 2017 Qn 4<\/a><\/p>\n<p><a href=\"https:\/\/pastpapers.papacambridge.com\/viewer\/caie\/cambridge-upper-secondary-igcse-computer-science-0478-2017-jun-0478-s17-qp-12-pdf\">0478\/12 &#8211; Paper 1 Theory May\/June 2017<\/a>\u00a0 \u00a0Qn7<\/p>\n<p><a href=\"https:\/\/pastpapers.papacambridge.com\/viewer\/caie\/cambridge-upper-secondary-igcse-computer-science-0478-2017-mar-0478-m17-qp-12-pdf\">0478\/12 &#8211; Paper 1 Theory February\/March 2017<\/a>\u00a0Qn3<\/p>\n<p><a href=\"https:\/\/pastpapers.papacambridge.com\/viewer\/caie\/cambridge-upper-secondary-igcse-computer-science-0478-2017-nov-0478-w17-qp-12-pdf\">0478\/12 &#8211; Paper 1 Theory October\/November 2017 Qn4<\/a><\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Serial Data Transmission Serial transmission is where data is transmitted one bit at a time between devices. On wired networks data is sent along a single wire. Serial Transmission Examples USB Devices Ethernet Cable Networks &nbsp; Parallel\u00a0Data Transmission Parallel transmission is where multiple wires are used to transmit multiple bits of data at the same&hellip;&nbsp;<a href=\"https:\/\/learnlearn.uk\/igcsecs\/data-transmission\/\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Data Transmission<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"on","neve_meta_content_width":84,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Data Transmission | 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On wired networks data is sent along a single wire. Serial Transmission Examples USB Devices Ethernet Cable Networks &nbsp; Parallel\u00a0Data Transmission Parallel transmission is where multiple wires are used to transmit multiple bits of data at the same&hellip;&nbsp;Read&hellip;","_links":{"self":[{"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/pages\/49"}],"collection":[{"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/comments?post=49"}],"version-history":[{"count":16,"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/pages\/49\/revisions"}],"predecessor-version":[{"id":790,"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/pages\/49\/revisions\/790"}],"wp:attachment":[{"href":"https:\/\/learnlearn.uk\/igcsecs\/wp-json\/wp\/v2\/media?parent=49"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}