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  2. List of TCP and UDP port numbers - Wikipedia

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

    This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for bidirectional traffic. TCP usually uses port numbers that match the services of the corresponding UDP implementations, if they exist, and vice versa.

  3. 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.Such an application may be used by administrators to verify security policies of their networks and by attackers to identify network services running on a host and exploit vulnerabilities.

  4. netcat - Wikipedia

    en.wikipedia.org/wiki/Netcat

    netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP.The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts.

  5. X Window System protocols and architecture - Wikipedia

    en.wikipedia.org/wiki/X_Window_System_protocols...

    The X server acts as a go-between for the user and the client programs, accepting requests on TCP port 6000 plus the display number [1] for graphical output (windows) from the client programs and displaying them to the user (display), and receiving user input (keyboard, mouse) and transmitting it to the client programs.

  6. Open port - Wikipedia

    en.wikipedia.org/wiki/Open_port

    Listing open TCP ports that are listening on the local machine. In security parlance, the term open port is used to mean a TCP or UDP port number that is configured to accept packets. In contrast, a port which rejects connections or ignores all packets directed at it is called a closed port. [1]

  7. NetBIOS over TCP/IP - Wikipedia

    en.wikipedia.org/wiki/NetBIOS_over_TCP/IP

    In relation to post-MS Windows 2000 / NT, client-server based networks, NetBIOS is effectively becoming a legacy protocol. NetBIOS was also developed for non-routable LANs. In most post year 2000 networks operating Windows 2000 or later, NetBIOS effectively offers backwards compatibility for network devices that predate compatibility with DNS ...

  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. Microsoft Message Queuing - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Message_Queuing

    The following ports are used for Microsoft Message Queuing operations: TCP: 1801; RPC: 135, 2101*, 2103*, 2105* UDP: 3527, 1801 * These port numbers may be incremented by 11 if the initial choice of RPC port is being used when Message Queuing initializes. Port 135 is queried to discover the 2xxx ports. [3]