{"id":2608,"date":"2019-08-28T09:19:29","date_gmt":"2019-08-28T09:19:29","guid":{"rendered":"https:\/\/www.testpreptraining.com\/tutorial\/?page_id=2608"},"modified":"2024-07-11T09:23:50","modified_gmt":"2024-07-11T09:23:50","slug":"dns-2","status":"publish","type":"page","link":"https:\/\/www.testpreptraining.ai\/tutorial\/dns-2\/","title":{"rendered":"Understanding DNS Concepts"},"content":{"rendered":"\n<p>In this, we will learn the DNS Concepts.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>translates domain names into IP addresses<\/li>\n\n\n\n<li>Needed as domain names are alphabetic and humans cannot remember IP address<\/li>\n\n\n\n<li>Like www.example.com is translated to 198.105.232.4<\/li>\n\n\n\n<li>DNS servers asks another DNS one if cannot translate a particular domain name<\/li>\n\n\n\n<li>DNS service is implemented as hierarchical system of splitting domain name similar to a tree<\/li>\n\n\n\n<li>Every node in tree is called domain and has a label<\/li>\n\n\n\n<li>domain name of node is actually combination of all labels present on path from root to that node<\/li>\n\n\n\n<li>Example for network.support.testprep.in\n<ul class=\"wp-block-list\">\n<li>support.testprep.in is the domain name.<\/li>\n\n\n\n<li>. is the root domain<\/li>\n\n\n\n<li>in is the top level domain<\/li>\n\n\n\n<li>testprep is the second-level domain<\/li>\n\n\n\n<li>support is a subdomain of microsoft<\/li>\n\n\n\n<li>network is the hostname<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>domain name space is partitioned into DNS zones<\/li>\n\n\n\n<li>every DNS zone, start at node and go to leaf node or nodes where other zones start<\/li>\n\n\n\n<li>DNS protocol use \u2014 port 53\/tcp and port 53\/udp.<\/li>\n\n\n\n<li>DNS name resolution process has steps as\n<ul class=\"wp-block-list\">\n<li>local nameserver checks for authority on required domain name after getting query from client, if present IP address is replied or next step is taken<\/li>\n\n\n\n<li>root nameserver at next level down, is queried by local nameserver for IP address<\/li>\n\n\n\n<li>Querying is repeated till address is returned<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"609\" height=\"162\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/09\/image-255.png\" alt=\"Understanding DNS Concepts\" class=\"wp-image-3969\"\/><figcaption class=\"wp-element-caption\"><strong>Understanding DNS Concepts<\/strong><\/figcaption><\/figure>\n\n\n\n<p>&nbsp;<\/p>\r\n<p><strong>Enhance your skills with expert guidance and tutorial on <a href=\"https:\/\/www.testpreptraining.ai\/aws-certified-advanced-networking-specialty-practice-exam\">AWS Advanced Networking Specialty<\/a>. Try Free Practice Test Now!<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this, we will learn the DNS Concepts. &nbsp; Enhance your skills with expert guidance and tutorial on AWS Advanced Networking Specialty. Try Free Practice Test Now!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[7,438,43],"class_list":["post-2608","page","type-page","status-publish","hentry","category-amazon-aws","tag-aws","tag-big-data-specialty","tag-dns"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Understanding DNS Concepts - Testprep Training Tutorials<\/title>\n<meta name=\"description\" content=\"Enhance your skills with expert guidance and tutorial on AWS Advanced Networking Specialty. 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