{"id":3411,"date":"2026-08-10T09:04:39","date_gmt":"2026-08-10T09:04:39","guid":{"rendered":"https:\/\/nokobox.com\/index.php\/item\/ns-lookup-the-dns-course-for-developers-2024-4\/"},"modified":"2026-08-10T09:04:39","modified_gmt":"2026-08-10T09:04:39","slug":"ns-lookup-the-dns-course-for-developers-2024-4","status":"publish","type":"digital_item","link":"https:\/\/nokobox.com\/index.php\/item\/ns-lookup-the-dns-course-for-developers-2024-4\/","title":{"rendered":"Ns Lookup \u2013 The DNS course for developers 2024-4"},"content":{"rendered":"<div class=\"w-post-elm post_content\">\n<h2 dir=\"ltr\">Descriptions<\/h2>\n<p dir=\"ltr\">The DNS course for developers, I\u2019ve had many side projects over the years, and never completely understood why my DNS records didn\u2019t update. Or how long to wait until they do. Worse yet, I\u2019ve had my emails bounce because I misconfigured SPF, DKIM and DMARC. I decided to learn DNS by making Nslookup.io, a web interface for DNS. I\u2019ve read the RFCs to implement a custom DNS client and I now run my own DNS server. Nslookup has become popular enough to replace my income, so I\u2019m working on it full-time since early 2022. Now that I\u2019ve spent so much time learning DNS, I\u2019m sharing everything I\u2019ve learned in this comprehensive video course. It will teach you to reason about DNS from first principles and guard you against the mistakes I made. When you finish this course, you will be able to manage and debug DNS with confidence.<\/p>\n<h3 dir=\"ltr\">What you\u2019ll learn<\/h3>\n<ul dir=\"ltr\">\n<li>Build a foundational understanding of the core concepts of DNS.<\/li>\n<li>We\u2019ll start from scratch and build up to a complete picture of the essence of DNS.<\/li>\n<li>Get familiar with the design goals of the domain name system and its main functions.<\/li>\n<li>Learn how domain names and DNS records are organized in a tree-like structure.<\/li>\n<li>Learn about the domain name registration process.<\/li>\n<\/ul>\n<h3 dir=\"ltr\">Specificatoin of The DNS course for developers<\/h3>\n<ul dir=\"ltr\">\n<li>Publisher : <a href=\"https:\/\/href.li\/?https:\/\/www.nslookup.io\/dns-course\/\" target=\"_blank\">Ns Lookup<\/a><\/li>\n<li>Teacher : <a href=\"https:\/\/downloadlynet.ir\/tag\/ruurtjan-pul\">Ruurtjan Pul<\/a><\/li>\n<li>Language : English<\/li>\n<li>Level : All Levels<\/li>\n<li>Number of Course : 46<\/li>\n<li>Duration : 3 hours and 8 minutes<\/li>\n<\/ul>\n<h3 dir=\"ltr\">Content of The DNS course for developers<\/h3>\n<p dir=\"ltr\">1. DNS is a database<br \/>2. The DNS is organized as a tree<br \/>3. Zone delegation<br \/>4. The root zone<br \/>5. Authoritative DNS servers<br \/>6. Zone transfer<br \/>7. Top-level domains<br \/>8. Second and third-level domains<br \/>9. Registries, registrars &amp; registrants<br \/>10. ICANN-s oversight<br \/>11. WHOIS &amp; RDAP<br \/>12. International domain names<br \/>13. The domain name lifecycle<br \/>14. Domain transfer<br \/>15. Recursive queries<br \/>16. Glue records<br \/>17. DNS caching<br \/>18. Negative caching<br \/>19. The DNS protocol<br \/>20. EDNS<br \/>21. Transport protocols<br \/>22. Public DNS resolvers<br \/>23. DDNS<br \/>24. Dynamic DNS responses<br \/>25. An overview of DNS record types<br \/>26. An overview of DNS record types<br \/>27. CNAME records<br \/>28. TXT records<br \/>29. SRV records<br \/>30. PTR records<br \/>31. DNSSEC-related record types<br \/>32. An overview of email configuration<br \/>33. Receiving email Resources and references<br \/>34. DANE Resources and references<br \/>35. MTA-STS Resources and references<br \/>36. SPF Resources and references<br \/>37. DKIM Resources and references<br \/>38. DMARC Resources and references<br \/>39. BIMI Resources and references<br \/>40. Cache invalidation<br \/>41. DNSSEC issues<br \/>42. Graceful DNS changes<br \/>43. Identifying root causes Resources and references<br \/>44. Inspecting DNS traffic Resources and references<br \/>45. Lame delegation Resources and references<br \/>46. Simulate slow or failing DNS<\/p>\n<h3 dir=\"ltr\">Pictures<\/h3>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-903474\" src=\"https:\/\/downloadly.ir\/wp-content\/uploads\/2024\/05\/The-DNS-course-for-developers.d.jpeg\" alt=\"The DNS course for developers\" width=\"611\" height=\"208\"><\/p>\n<h3 dir=\"ltr\">Sample Clip<\/h3>\n<div style=\"width: 640px;\" class=\"wp-video\"><span class=\"mejs-offscreen\">Video Player<\/span><\/p>\n<div id=\"mep_0\" class=\"mejs-container mejs-container-keyboard-inactive wp-video-shortcode mejs-video\" tabindex=\"0\" role=\"application\" aria-label=\"Video Player\" style=\"width: 640px; height: 360px; min-width: 217px;\">\n<div class=\"mejs-inner\">\n<div class=\"mejs-mediaelement\"><mediaelementwrapper id=\"video-126836-1\"><video class=\"wp-video-shortcode\" id=\"video-126836-1_html5\" width=\"640\" height=\"360\" preload=\"metadata\" src=\"https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/DNS_course_for_developers_Downloadly.ir.mp4?_=1\" style=\"width: 640px; height: 360px;\"><source type=\"video\/mp4\" src=\"https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/DNS_course_for_developers_Downloadly.ir.mp4?_=1\"><a href=\"https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/DNS_course_for_developers_Downloadly.ir.mp4?nocache=1786098463198\">https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/DNS_course_for_developers_Downloadly.ir.mp4<\/a><\/video><\/mediaelementwrapper><\/div>\n<div class=\"mejs-layers\">\n<div class=\"mejs-poster mejs-layer\" style=\"display: none; width: 100%; height: 100%;\"><\/div>\n<div class=\"mejs-overlay mejs-layer\" style=\"display: none; width: 100%; height: 100%;\">\n<div class=\"mejs-overlay-loading\"><span class=\"mejs-overlay-loading-bg-img\"><\/span><\/div>\n<\/div>\n<div class=\"mejs-overlay mejs-layer\" style=\"display: none; width: 100%; height: 100%;\">\n<div class=\"mejs-overlay-error\"><\/div>\n<\/div>\n<div class=\"mejs-overlay mejs-layer mejs-overlay-play\" style=\"width: 100%; height: 100%;\">\n<div class=\"mejs-overlay-button\" role=\"button\" tabindex=\"0\" aria-label=\"Play\" aria-pressed=\"false\"><\/div>\n<\/div>\n<\/div>\n<div class=\"mejs-controls\">\n<div class=\"mejs-button mejs-playpause-button mejs-play\"><button type=\"button\" aria-controls=\"mep_0\" title=\"Play\" aria-label=\"Play\" tabindex=\"0\"><\/button><\/div>\n<div class=\"mejs-time mejs-currenttime-container\" role=\"timer\" aria-live=\"off\"><span class=\"mejs-currenttime\">00:00<\/span><\/div>\n<div class=\"mejs-time-rail\"><span class=\"mejs-time-total mejs-time-slider\" role=\"slider\" tabindex=\"0\" aria-label=\"Time Slider\" aria-valuemin=\"0\" aria-valuemax=\"0\" aria-valuenow=\"0\" aria-valuetext=\"00:00\"><span class=\"mejs-time-buffering\" style=\"display: none;\"><\/span><span class=\"mejs-time-loaded\"><\/span><span class=\"mejs-time-current\"><\/span><span class=\"mejs-time-hovered no-hover\"><\/span><span class=\"mejs-time-handle\"><span class=\"mejs-time-handle-content\"><\/span><\/span><span class=\"mejs-time-float\"><span class=\"mejs-time-float-current\">00:00<\/span><span class=\"mejs-time-float-corner\"><\/span><\/span><\/span><\/div>\n<div class=\"mejs-time mejs-duration-container\"><span class=\"mejs-duration\">00:00<\/span><\/div>\n<div class=\"mejs-button mejs-volume-button mejs-mute\"><button type=\"button\" aria-controls=\"mep_0\" title=\"Mute\" aria-label=\"Mute\" tabindex=\"0\"><\/button><a href=\"javascript:void(0);\" class=\"mejs-volume-slider\" aria-label=\"Volume Slider\" aria-valuemin=\"0\" aria-valuemax=\"100\" role=\"slider\" aria-orientation=\"vertical\"><span class=\"mejs-offscreen\">Use Up\/Down Arrow keys to increase or decrease volume.<\/span><\/p>\n<div class=\"mejs-volume-total\">\n<div class=\"mejs-volume-current\" style=\"bottom: 0px; height: 100%;\"><\/div>\n<div class=\"mejs-volume-handle\" style=\"bottom: 100%; margin-bottom: -3px;\"><\/div>\n<\/div>\n<p><\/a><\/div>\n<div class=\"mejs-button mejs-fullscreen-button\"><button type=\"button\" aria-controls=\"mep_0\" title=\"Fullscreen\" aria-label=\"Fullscreen\" tabindex=\"0\"><\/button><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 dir=\"ltr\">Installation Guide<\/h3>\n<p dir=\"ltr\">Extract the files and watch with your favorite player<\/p>\n<p dir=\"ltr\">Subtitle : Not Available<\/p>\n<p dir=\"ltr\">Quality: 1080p<\/p>\n<h3 dir=\"ltr\">Download Links<\/h3>\n<p dir=\"ltr\"><a href=\"https:\/\/dl3.downloadly.ir\/Files\/Elearning\/Ns_Lookup_DNS_course_for_developers_2024-4_Downloadly.ir.part1.rar?nocache=1786098462\">Download Part 1 \u2013 1 GB<\/a><\/p>\n<p dir=\"ltr\"><a href=\"https:\/\/dl3.downloadly.ir\/Files\/Elearning\/Ns_Lookup_DNS_course_for_developers_2024-4_Downloadly.ir.part2.rar?nocache=1786098462\">Download Part 2 \u2013 440 MB<\/a><\/p>\n<h5 dir=\"ltr\">Password file(s): <a>www.downloadly.ir<\/a><\/h5>\n<h3 dir=\"ltr\">File size<\/h3>\n<p dir=\"ltr\">1.42 GB<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Descriptions The DNS course for developers, I\u2019ve had many side projects over the years, and never completely understood why my DNS records didn\u2019t update. Or how<\/p>\n","protected":false},"author":1,"template":"","dgi_category":[10458],"dgi_tag":[38290,38291,38292,38293,38294,38295,38296,38297,38298],"class_list":["post-3411","digital_item","type-digital_item","status-publish","has-post-thumbnail","hentry","dgi_category-video-tutorials","dgi_tag-download-the-dns-course-for-developers","dgi_tag-free-download-the-dns-course-for-developers","dgi_tag-free-the-dns-course-for-developers","dgi_tag-ns-lookup-the-dns-course-for-developers","dgi_tag-ruurtjan-pul","dgi_tag-the-dns-course-for-developers","dgi_tag-the-dns-course-for-developers-download","dgi_tag-the-dns-course-for-developers-free","dgi_tag-the-dns-course-for-developers-free-download"],"_links":{"self":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/digital_item\/3411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/digital_item"}],"about":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/types\/digital_item"}],"author":[{"embeddable":true,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/digital_item\/3411\/revisions"}],"wp:attachment":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/media?parent=3411"}],"wp:term":[{"taxonomy":"dgi_category","embeddable":true,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/dgi_category?post=3411"},{"taxonomy":"dgi_tag","embeddable":true,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/dgi_tag?post=3411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}