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  2. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP. 53: Yes: Domain Name System (DNS) 54: Assigned: Xerox Network Systems (XNS) Clearinghouse (Name Server). Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP. 55

  3. Domain Name System - Wikipedia

    en.wikipedia.org/wiki/Domain_Name_System

    DNS over UDP/TCP/53 (Do53) UDP reserves port number 53 for servers listening to queries. Such queries consist of a clear-text request sent in a single UDP packet from the client, responded to with a clear-text reply sent in a single UDP packet from the server.

  4. DNS over TLS - Wikipedia

    en.wikipedia.org/wiki/DNS_over_TLS

    DNS over TLS (DoT) is a network security protocol for encrypting and wrapping Domain Name System (DNS) queries and answers via the Transport Layer Security (TLS) protocol. The goal of the method is to increase user privacy and security by preventing eavesdropping and manipulation of DNS data via man-in-the-middle attacks .

  5. Amazon Route 53 - Wikipedia

    en.wikipedia.org/wiki/Amazon_Route_53

    Amazon Route 53. Amazon Route 53 ( Route 53) is a scalable and highly available Domain Name System (DNS) service. Released on 5 December 2010 (13 years ago), [1] it is part of Amazon.com 's cloud computing platform, Amazon Web Services (AWS). The name is a possible reference to U.S. Routes, [2] and "53" is a reference to the TCP/UDP port 53 ...

  6. List of DNS record types - Wikipedia

    en.wikipedia.org/wiki/List_of_DNS_record_types

    Address record. Returns a 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host, but it is also used for DNSBLs, storing subnet masks in RFC 1101, etc. AAAA. 28. RFC 3596 [2] IPv6 address record. Returns a 128-bit IPv6 address, most commonly used to map hostnames to an IP address of the host.

  7. Reverse DNS lookup - Wikipedia

    en.wikipedia.org/wiki/Reverse_DNS_lookup

    In computer networks, a reverse DNS lookup or reverse DNS resolution ( rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. [1] The process of reverse resolving of an IP address uses PTR ...

  8. DNS over HTTPS - Wikipedia

    en.wikipedia.org/wiki/DNS_over_HTTPS

    DNS over HTTPS (DoH) is a protocol for performing remote Domain Name System (DNS) resolution via the HTTPS protocol. A goal of the method is to increase user privacy and security by preventing eavesdropping and manipulation of DNS data by man-in-the-middle attacks [1] by using the HTTPS protocol to encrypt the data between the DoH client and ...

  9. Top-level domain - Wikipedia

    en.wikipedia.org/wiki/Top-level_domain

    While this does create apex DNS records of type A and MX, they do not qualify as a dotless domain, as the records should not point to real servers. For instance, the A record contains the IP 127.0.53.53, a loopback address (see IPv4 § Addressing), picked as a mnemonic to indicate a DNS-related problem, as DNS uses port 53. Pseudo-domains