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Edit Port 53 - (TCP & UDP)
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Brief Description
<p>DNS (Domain Name System) uses Port 53 UDP to resolve human-readable hostnames to numerical IP addresses, TCP may also be used to achieve reliable querying. </p>
Detailed Description
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Verdana; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; color: black; background: white; mso-fareast-language: EN-GB;">Domain Name System, known more commonly as the abbreviated DNS, is a decentralised naming system that computers and servers use to locate resources on a network such as the world wide web (internet), or a local area network.</span></p> <p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Verdana; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; color: black; background: white; mso-fareast-language: EN-GB;">Its primary purpose is to convert humanly readable and memorisable names such as whatportis.com or google.com, into the routable IP address of a server/client, such as 192.168.0.123 or 8.8.8.8.</span></p> <p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Verdana; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; color: black; background: white; mso-fareast-language: EN-GB;">The system delegates the responsibility of answering queries for a specific domain to authoritative name servers, providing the hierarchical decentralised naming system.</span></p> <p class="MsoNormal"><span style="font-family: Verdana; font-size: 10.5pt;">There are many types of records that can be stored within a specific domains database, some of the most common are A and AAAA records which convert a name to an IP address, MX records which are used by SMTP servers for mail delivery, and PTR records to perform the reverse and look up a domain from a known IP address.</span></p>
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