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  2. List of TCP and UDP port numbers - Wikipedia

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

    Xerox Network Systems (XNS) Mail. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP. [36] 61: Reserved: Historically assigned to the NIFTP-Based Mail protocol, [38] but was never documented in the related IEN. [39] The port number entry was removed from IANA's registry on 2017 ...

  3. Registered port - Wikipedia

    en.wikipedia.org/wiki/Registered_port

    A registered port is a network port designated for use with a certain protocol or application.. Registered port numbers are currently assigned by the Internet Assigned Numbers Authority (IANA) and were assigned by Internet Corporation for Assigned Names and Numbers (ICANN) before March 21, 2001, [1] and were assigned by the Information Sciences Institute (USC/ISI) before 1998.

  4. Link-Local Multicast Name Resolution - Wikipedia

    en.wikipedia.org/wiki/Link-Local_Multicast_Name...

    The Link-Local Multicast Name Resolution (LLMNR) is a protocol based on the Domain Name System (DNS) packet format that allows both IPv4 and IPv6 hosts to perform name resolution for hosts on the same local link.

  5. 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 .

  6. Ephemeral port - Wikipedia

    en.wikipedia.org/wiki/Ephemeral_port

    An ephemeral port is a communications endpoint of a transport layer protocol of the Internet protocol suite that is used for only a short period of time for the duration of a communication session. Such short-lived ports are allocated automatically within a predefined range of port numbers by the IP stack software of a computer operating system.

  7. Multicast DNS - Wikipedia

    en.wikipedia.org/wiki/Multicast_DNS

    Multicast DNS (mDNS) is a computer networking protocol that 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).

  8. Port scanner - Wikipedia

    en.wikipedia.org/wiki/Port_scanner

    A port scanner is an application designed to probe a server or host for open ports. ... a host address and a port number. There are 65535 distinct and usable port ...

  9. List of DNS record types - Wikipedia

    en.wikipedia.org/wiki/List_of_DNS_record_types

    Specifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone. SRV: 33 RFC 2782 Service locator