DNS can use either the User Datagram Protocol (UDP) or Transmission Control Protocol (TCP) and historically uses a destination port of 53. When the DNS protocol uses UDP as the transport, it has the ability to deal with UDP retransmission and sequencing.
May 22, 2020 Understanding DNS - Beginners Guide to DNS Nov 30, 2019 [SOLVED] DNS to IP mapping - Networking - Spiceworks Nov 05, 2019 Service overview and network port requirements for Windows
How to Fix a DNS Error - Fixing Server Problems - Tom’s
Port Scanner Tool checks the most common ports used by Windows services, Ubuntu servers, favorite games, or other software. We have a pre-defined list of all available used ports, you have to enter any domain or IP address, and this tool checks which ports are active and accepting requests on your IP or domain. Step 3: Next, locate the port forwarding settings. Typically this will be under Advanced and then Port Forwarding or Virtual Server. Step 4: On the Port Forwarding page enter in a name for your device like, “Camera”. Then enter the port you are forwarding in the port field. The collection of host-name-to-IP-address mappings contained with the DNS database is also known as a namespace. Essentially, when looking for a name in DNS, the DNS client first checks a top-level DNS server database. That server tells the client which DNS server hosts the next part of the DNS name, and the client then queries that server. DNS is an IP Address (layer 3) to hostname mapping service. It does not interact with TCP (layer 4) in any way. DNS doesn't provide port numbers - you have to
Jan 23, 2019
[SOLVED] DNS to IP mapping - Networking - Spiceworks Nov 05, 2019