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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. Amazon Route 53 - Wikipedia

    en.wikipedia.org/wiki/Amazon_Route_53

    The name is a possible reference to U.S. Routes, and "53" is a reference to the TCP/UDP port 53, where DNS server requests are addressed. [3] In addition to being able to route users to various AWS services, including EC2 instances, Route 53 also enables AWS customers to route users to non-AWS infrastructure and to monitor the health of their ...

  5. 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 .

  6. DNS zone transfer - Wikipedia

    en.wikipedia.org/wiki/DNS_zone_transfer

    DNS zone transfer, also sometimes known by the inducing DNS query type AXFR, is a type of DNS transaction. It is one of the many mechanisms available for administrators to replicate DNS databases across a set of DNS servers .

  7. Google Public DNS - Wikipedia

    en.wikipedia.org/wiki/Google_Public_DNS

    Google Public DNS is a Domain Name System (DNS) service offered to Internet users worldwide by Google. It functions as a recursive name server . Google Public DNS was announced on December 3, 2009, [1] in an effort described as "making the web faster and more secure."

  8. Port (computer networking) - Wikipedia

    en.wikipedia.org/wiki/Port_(computer_networking)

    In computer networking, a port or port number is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system , a port is a logical construct that identifies a specific process or a type of network service .

  9. Multicast DNS - Wikipedia

    en.wikipedia.org/wiki/Multicast_DNS

    In computer networking, the multicast DNS (mDNS) protocol resolves hostnames to IP addresses within small networks that do not include a local name server.It is a zero-configuration service, using essentially the same programming interfaces, packet formats and operating semantics as unicast Domain Name System (DNS).