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  2. List of TCP and UDP port numbers - Wikipedia

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

    The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...

  3. nslookup - Wikipedia

    en.wikipedia.org/wiki/Nslookup

    nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).

  4. 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.

  5. 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.

  6. netstat - Wikipedia

    en.wikipedia.org/wiki/Netstat

    If the port is not yet established, the port number is shown as an asterisk. Foreign Address – The IP address and port number of the remote computer to which the socket is connected. The names that corresponds to the IP address and the port are shown unless the -n parameter is specified. If the port is not yet established, the port number is ...

  7. Web Proxy Auto-Discovery Protocol - Wikipedia

    en.wikipedia.org/wiki/Web_Proxy_Auto-Discovery...

    If the DNS method is used, a file named wpad.dat must be located in the WPAD Web site's root directory. The PAC files are discussed in the Proxy auto-config article. Use caution when configuring a WPAD server in a virtual hosting environment. When automatic proxy detection is used, WinHTTP and WinINET in Internet Explorer 6 and earlier send a ...

  8. List of Java bytecode instructions - Wikipedia

    en.wikipedia.org/wiki/List_of_Java_bytecode...

    This is a list of the instructions that make up the Java bytecode, an abstract machine language that is ultimately executed by the Java virtual machine. [1] The Java bytecode is generated from languages running on the Java Platform, most notably the Java programming language.

  9. WHOIS - Wikipedia

    en.wikipedia.org/wiki/WHOIS

    Substitution or wild-card formats also exist, e.g., appending a full-stop (period) to the query name returns all entries beginning with the query name. On the modern Internet, WHOIS services are typically communicated using the Transmission Control Protocol (TCP). Servers listen to requests on the well-known port number 43. Clients are simple ...