t is helpful for you to familiarize yourself first with the different types of DNS servers before deciding on which DNS configuration to adopt.
Types of DNS Servers
Highlighted below are some common DNS server types. Each DNS server carries out a specific function, and your choice of DNS configuration should, as a matter of fact, be based on your requirements and the problems you want to resolve.
Authority-Only DNS Servers: Authority-only DNS servers only provides answers or solutions to queries that they are responsible for. They are fast for resolving the queries in their zones, but they neither cache results nor respond to recursive queries. Take for instance, the military or scientific organizations may configure their internet to only release DNS information/data that is only related to their field/industry.
Caching DNS Servers: The primary function of Caching DNS Servers is to attend to recursive queries from users. Unlike Authority-Only DNS Server that handles only a specific, limited range of queries from its specific zone information, Caching DNS Server tends to deal with widespread recursive queries using its broad base of public DNS information. And to avoid sending multiple queries to different cache servers, a caching DNS Server immediately caches the results of the initial query, and makes them available to the users. Caching DNS server is the most common server for internet users. When people send a query to the internet, irrespective of the operating system they may using, they are mainly requesting the answers to their queries through Cashing DNS servers.
Forwarding DNS Servers: As their names imply, Forwarding DNS Servers act as forwarding agents for recursive queries. They don’t, on their own, resolve any recursive queries but pass them on to the appropriate servers that will provide solutions/answers to the queries. This kind of servers can also be used as “a filter”, in the sense that sensitive internal information is forwarded to the private servers within an organization while the information meant for external audience is routed through the public servers.
Combined Servers: It is possible to combine the three different servers described above so as to achieve a well-connected and functional Domain Name System. However, when different servers are combined into a single server, it may cause a problem of information/data overload that may heat up the servers.
Public and Private Servers: The public servers handle the data/information for the public audience, while the private servers are used by companies that want to pass the information around for their internal staff only. To purely maintain a private server, it is advisable that all references to it must be removed from the public servers.
Master or slave servers: A master server handles more zone files than the slave server, even though both of them handle mainly authoritative data/information in their zones. However, a slave-server deals with information obtained from one of the zone files of the master server. In a certain circumstance, a master server can become a slave server, depending on the amount of zone files they can handle. Technically, every DNS server has, at least, two zones.
[]
{"name":"WhoDat1 - DNS Propagation Tool","ads":{"one":"","two":"","three":"<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9233126337026241\"\n crossorigin=\"anonymous\"><\/script>","four":"","five":"<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9233126337026241\"\n crossorigin=\"anonymous\"><\/script>","six":""},"socials":[],"colors":{"primary":"#0155b5","secondary":"#2fc10a","tertiary":"#d2ab3e"},"global":{"css":" body,a,p,h1,h2,h3,h4,h5,h6{\n margin: 0 auto;\n }\n.mobile{\n\tdisplay:none;\n}\n.desktop{\ndisplay:flex;\n}\n .container{\n width: 1170px;\n }\n\n .titles{\n margin: 0 20px;\n }\n .titles #basic-addon2 {\n font-size: 18px;\n z-index: 10;\n}\n.titles .form-control{\nheight:auto;\n}\n.titles .btn_style, .btn_style_blue {\n color:#fff;\n font-size: 14px;\n font-weight: 600!important;\n background: linear-gradient(95.64deg,#1c3d9f 0%,#3096cb 100.33%);\n border-radius: 5px;\n border: none;\n outline: none;\n padding: 10px 23px;\n display: inline-flex;\n align-items: center;\n transition: all .3s ease-in-out;\n}\n.titles .btn_style, .btn_style_blue:hover{\n color: #fff;\n}\n.titles .input-group {\n position: relative;\n display: flex;\n flex-wrap: wrap;\n align-items: stretch;\n width: 100%;\n margin: 30px 0;\n}\n.titles .input_style, .textarea_style, .input_style:focus, .textarea_style:focus {\n background-color: #efefef!important;\n color: var(--clr-black)!important;\n font-size: 18px;\n font-weight: 600!important;\n padding: 18px 15px;\n border-radius: 8px;\n box-shadow: inset 1px 1px 6px rgba(0,0,0,.161)!important;\n outline: none;\n border: none;\n}\n .titles .button{\n text-align: center;\n }\n .titles .button a{\n border: none;\n background: #D0E7FF;\n color: #007AFF;\n border-radius: 20px;\n padding: 10px 40px;\n margin: 20px 7px 0;\n font-weight: 600;\n font-size: 14px;\n text-decoration: none;\n }\n .title{\n margin: 0 20px;\n }\n .title p{\n font-size: 14px;\n color: #666666;\n }\n .title .boxis{\n margin-top: 100px;\n }\n .title .box{\n display: flex;\n }\n.title .box a{\ntext-decoration:none;\ncolor:#000;\n}\n .title .box .d-flex img{\n width: 25%;\n background: rgb(201, 255, 201);\n padding: 5px;\n border-radius: 5px;\n border: 2px solid rgb(178, 211, 178);\n }\n .title .box .d-flex h5{\n margin: 0 15px;\n font-size: 16px;\n font-weight: 700;\n }\n .title .box p{\n margin: 10px 0 0 0;\n font-size: 12px;\n }\n .title .box1{\n margin: 10px;\n padding: 20px;\n width: 266PX;\n height: 115PX;\n }\n .title .box1 .d-flex{\n align-items: center;\n }\n .footerdiv p{\ntext-align:center;\nmargin-top:-150px;\n}\n @media(max-width:768px){\n.mobile{\n\t\tdisplay:block;\n\t}\n\t.desktop{\n\t\tdisplay:none;\n\t}\n .container{\n max-width: 100%;\npadding:0px;\n }\n.container, .container-fluid, .container-lg, .container-md, .container-sm, .container-xl, .container-xxl {\n width: 100%;\n padding-right: 0!important;\n padding-left: 0!important;\n margin-right: auto;\n margin-left: auto;\n}\n .titles{\n margin: 0;\n }\n .titles ul{\n padding: 0;\n }\n ::placeholder{\n color: #fff;\n opacity: 1;\n }\n .titles .button a{\n padding: 10px 22px;\n }\n .title {\n margin: 0;\n }\n .title .boxis {\n margin-top: 20px;\n}\n .title .box{\n display: block;\n }\n .title .box1{\n margin: 15px 0;\n width: 100%;\nheight:auto;\n }\n.title .box .d-flex h5{\nfont-size:15px;\n}\n }","js":"","header":"<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, shrink-to-fit=no\">\n<meta http-equiv=\"Content-Type\" content=\"text\/html; charset=utf-8\" \/>\n<link rel=\"canonical\" href=\"https:\/\/whodat1.com\" \/>\n<meta name=\"keywords\" content=\"DNS, WHOIS, Propagation, server, global, lookup, mx, checker\" \/>\n<meta name=\"description\" content=\"Check DNS Propagation worldwide. DNS Checker provides name server propagation check instantly. Changed nameservers so do a DNS lookup and check if DNS and nameservers have propagated.\" \/>\n<meta property=\"og:title\" content=\"WhoDat1 - DNS Propagation Tool\" \/>\n<meta property=\"og:description\" content=\"Check DNS Propagation worldwide. DNS Checker provides name server propagation check instantly. Recently changed DNS info, do a lookup and check if DNS and nameservers have propagated.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/whodat1.com\" \/>\n<meta property=\"og:image\" content=\"https:\/\/whodat1.com\/images\/logo.png\" \/>\n<meta property=\"og:site_name\" content=\"WhoDat1\" \/>\n<meta property='og:type' content='website' \/>","footer":"<!-- ws.metratics.com -->\n<script>\n var _paq = window._paq = window._paq || [];\n \/* tracker methods like \"setCustomDimension\" should be called before \"trackPageView\" *\/\n _paq.push(['trackPageView']);\n _paq.push(['enableLinkTracking']);\n (function() {\n var u=\"\/\/ws.metratics.com\/\";\n _paq.push(['setTrackerUrl', u+'matomo.php']);\n _paq.push(['setSiteId', '11']);\n var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];\n g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);\n })();\n<\/script>\n<!-- End Metratics Code -->\n\n<!-- Google tag (gtag.js) -->\n<script async src=\"https:\/\/www.googletagmanager.com\/gtag\/js?id=G-8R7G86WB8F\"><\/script>\n<script>\n window.dataLayer = window.dataLayer || [];\n function gtag(){dataLayer.push(arguments);}\n gtag('js', new Date());\n\n gtag('config', 'G-8R7G86WB8F');\n<\/script>\n\n<script async src=\"https:\/\/fundingchoicesmessages.google.com\/i\/pub-9233126337026241?ers=1\" nonce=\"MaGSS3hyI4nTxqSufLzSrQ\"><\/script><script nonce=\"MaGSS3hyI4nTxqSufLzSrQ\">(function() {function signalGooglefcPresent() {if (!window.frames['googlefcPresent']) {if (document.body) {const iframe = document.createElement('iframe'); iframe.style = 'width: 0; height: 0; border: none; z-index: -1000; left: -1000px; top: -1000px;'; iframe.style.display = 'none'; iframe.name = 'googlefcPresent'; document.body.appendChild(iframe);} else {setTimeout(signalGooglefcPresent, 0);}}}signalGooglefcPresent();})();<\/script>\n\n<div class=\"footerdiv\"><p>Copyright 2023 - WhoDat1.com<\/p><\/div>\n"},"cookie":{"enable":true,"text":"<p>By using this website you agree to our <a href=\"#\" target=\"_blank\">Cookie Policy<\/a><\/p>"},"font_family":"Poppins","text":{"above_map":"<h5>DNS Propagation Map by WhoDat1.com<\/h5><p><br><\/p><p>Have you recently made changes in your DNS records, switched web host, or started a new website? WhoDat1.com offers free DNS propagation check service to check Domain Name System records against a selected list of DNS servers in multiple regions worldwide. DNS propagation inquiries are important so that visitors are able to find web services, mail services, and more. The <span style=\"color: rgb(230, 0, 0);\">RED X<\/span> means the query has NOT been resolved, the <span style=\"color: rgb(0, 138, 0);\">GREEN Check Mark<\/span> the query has been resolved.<\/p>","below_map":"<p><span style=\"color: rgb(55, 65, 81);\">Our free online DNS Propagation Checker tool allows you to verify DNS propagation worldwide. Easily check DNS data for any hostname or domain from DNS servers across the globe.<\/span><\/p><p><span style=\"color: rgb(55, 65, 81);\">Our DNS Propagation Checker tool simplifies global DNS checks by offering a comprehensive list of over 100 global DNS servers. You can customize the DNS server for certain tools and perform DNS checks using different servers.<\/span><\/p><p><span style=\"color: rgb(55, 65, 81);\">To enhance understanding, our tool collects, parses, and displays DNS propagation results on a map. A green tick indicates that the requested DNS record is available on the DNS server, while a cross indicates its unavailability. The green tick also signifies that the DNS record matches the expected value set by the user, whereas a cross indicates a mismatch. To view individual DNS record propagation lookup on global DNS servers, simply select each DNS record.<\/span><\/p><p><br><\/p><h5><span style=\"color: rgb(55, 65, 81);\">\ufeffThe most common DNS record types include:<\/span><\/h5><ul><li>A record: Contains the IPv4 address information of the hostname.<\/li><li>AAAA record: Contains the IPv6 address information of the hostname.<\/li><li>CNAME record: Also known as an alias record, it redirects the sub-domain to its domain, such as redirecting <a href=\"https:\/\/www.whodat1.com\/\" target=\"_blank\" style=\"color: blue;\"><u>https:\/\/www.whodat1.com<\/u><\/a> to whodat1.com.<\/li><li>MX record: Provides information on where the domain's email should be routed and the priority of mail servers.<\/li><li>NS record: Offers information about the authoritative nameservers of a domain.<\/li><li>TXT record: Commonly used for other DNS record configurations like SPF, DKIM, or DMARC records.<\/li><\/ul><p><br><\/p><h5><span style=\"color: rgb(55, 65, 81);\">What is DNS propagation? <\/span><\/h5><p><span style=\"color: rgb(55, 65, 81);\">DNS propagation refers to the time it takes for DNS changes to propagate across the internet globally. This process can take up to 48 hours to complete worldwide. Use our <\/span><a href=\"https:\/\/whodat1.com\/\" target=\"_blank\" style=\"color: rgb(55, 65, 81);\">DNS Propagation Checker<\/a><span style=\"color: rgb(55, 65, 81);\"> to monitor and track the progress of your DNS changes.<\/span><\/p><p><br><\/p><h5><br><\/h5><p><br><\/p>","footer":"<p class=\"ql-align-center\"><br><\/p>"},"find_btn":{"text":"Find","color":"#F3DF00","text_color":"#000000"},"whois_btn":{"text":"Lookup","color":"#5CC9FF","text_color":"#000000"},"default_dns":"A","enable_logs":true,"show_dark_mode":true,"enable_ad_block_detector":false,"ad_block_detector_filename":"show_ad.js","map_fail_reloader":false,"timeout":5}