The protocol still works completely the same, there are just a couple of things that happen independently alongside of what the ACME protocol is doing. Alongside setting up the ACME client and configuring it to contact your chosen CA, your organization undergoes either organization or extended validation – whatever you choose.

Either TCP or UDP can be used to transport DNS protocol messages, connecting to server port 53 for either. Ordinary DNS requests can be made with TCP, though convention dictates the use of UDP for normal operation. TCP must be used for zone transfers, however, because of the danger of dropping records with an unreliable delivery protocol such How Domain Name Servers Work | HowStuffWorks DNS is a protocol within the set of standards for how computers exchange data on the internet and on many private networks, known as the TCP/IP protocol suite. Its purpose is vital, as it helps convert easy-to-understand domain names like "" into an Internet Protocol (IP) address, such as that computers use to networking - When do DNS queries use TCP instead of UDP The maximum size was originally 512 bytes but there is an extension to the DNS protocol that allows clients to indicate that they can handle UDP responses of up to 4096 bytes. DNSSEC responses are usually larger than the maximum UDP size. Transfer requests are usually larger than the maximum UDP size and hence will also be done over TCP.

Google DNS Servers, Benefits & How to Use

As stated in other answers, DNS can use both. When DNS was invented (around 1983), UDP was chosen as the primary transport because: * Server resources are limited (and were more restricted 40 years ago) * UDP does not require the overhead of track What layer is DNS protocol? | AnswersDrive In this way, DNS acts as a mnemonic device, making network resources easier to remember for network users. The Windows Server 2003 DNS Server and Client services use the DNS protocol that is included in the TCP/IP protocol suite. DNS is part of the application layer of the TCP/IP reference model. DNS-over-HTTPS causes more problems than it solves

The Domain Name System (DNS) is one of the foundations of the internet, yet most people outside of networking probably don’t realize they use it every day to do their jobs, check their email or

How does Windows decide which DNS Server to use when What algorithm does Windows use to decide which DNS Server it will query in order to resolve names? Let's say I have several interfaces, all active, some with no dns server specified, some told to determine it automatically, and some with it specified manually (in interface ipv4 AND interface ipv6).