An illustrated Guide to DNS Message Compression — DNS message compression refers to a technique used to remove redundant information from its messages. This technique works by replacing duplicated names in a DNS message with a two-byte value indicating the location of their first occurrence. …

Dans cet article, j’introduis les notions et concepts sous-jacents à Internet et aux réseaux de données en général. Il s’agit d’un article incrémental que je mets à jour régulièrement. Cet article concentre en grande partie les notes de cours de l’unité d’enseignement LU3IN033 que Promethee Spathis enseigne à Sorbonne Université…

A comprehensive guide to Moodle Embedded-Answers (Cloze) questions — Moodle as many other learning managing systems allows instructors to design online assessments. In Moodle, online assessments are called quizzes. Quizzes can be used to administer tests, assignments, quizzes, or exams. A quizz consists of questions you can either create from scratch or select from the question bank. …

A friendly introduction to IPv6 node-solicited multicast addresses and ICMPv6 Neighbor Discovery — Broadcast is at the center of many IPv4 discovery services including DHCP and ARP. Despite this dependency, IPv6 has removed the need for broadcast. In this article, I present how multicast has allowed IPv6 to offer similar services without relying on broadcast. Keywords: IPv6, multicast, address mapping, node-solicited address, ICMPv6…

A comprehensive guide to Moodle Quiz Activity — Since the beginning of the pandemic, take-home exams have been all the rage in many universities worldwide. Take-home exams present many advantages including the practicality of not requiring students to assemble at the same place and the same time, while waiving the need for proctoring technologies [1, 2, 3, 4]. …

With the pandemic still raging across the world, organizing exams is challenging. Some universities have resorted to outdoor exams in school yards [1] or even stadiums [2,3]. That’s when weather or air quality conditions allow [4]. …