1.0ISTE Grouphttps://www.istegroup.com/frMarcio Marimhttps://www.istegroup.com/fr/profile/marcio-marim/rich600338<blockquote class="wp-embedded-content" data-secret="IXDMIICrHP"><a href="https://www.istegroup.com/fr/book/digital-communications-2/">Digital Communications 2</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.istegroup.com/fr/book/digital-communications-2/embed/#?secret=IXDMIICrHP" width="600" height="338" title="« Digital Communications 2 » — ISTE Group" data-secret="IXDMIICrHP" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.istegroup.com/wp-includes/js/wp-embed.min.js </script> https://www.istegroup.com/wp-content/uploads/2018/01/doc_suwwouonrhtn.jpg9451500Humans have always used communication systems: first with smoke signals, and then with the telegraph and telephone. These systems and their technological advances have changed our lifestyle profoundly. Nowadays, smartphones enable us to make calls, watch videos and use social networks, and with this comes the emergence of the connected man and the wider applications […]