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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  3. netstat - Wikipedia

    en.wikipedia.org/wiki/Netstat

    netstat. In computing, netstat ( network statistics) is a command-line network utility that displays network connections for Transmission Control Protocol (both incoming and outgoing), routing tables, and a number of network interface ( network interface controller or software-defined network interface) and network protocol statistics.

  4. ping (networking utility) - Wikipedia

    en.wikipedia.org/wiki/Ping_(networking_utility)

    ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It is available for virtually all operating systems that have networking capability, including most embedded network administration software. Ping measures the round-trip time for messages sent from the ...

  5. List of TCP and UDP port numbers - Wikipedia

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

    Peer Distributed Transfer Protocol (PDTP), FTP like file server in a P2P network 6100 Unofficial: Vizrt System Unofficial: Ventrilo authentication for version 3 6101: Unofficial: Backup Exec Agent Browser [citation needed] 6110: Yes: softcm, HP Softbench CM 6111: Yes: spc, HP Softbench Sub-Process Control 6112 Yes: dtspcd, execute commands and ...

  6. Transmission Control Protocol - Wikipedia

    en.wikipedia.org/wiki/Transmission_Control_Protocol

    RFC (s) RFC 9293. The Transmission Control Protocol ( TCP) is one of the main protocols of the Internet protocol suite. It originated in the initial network implementation in which it complemented the Internet Protocol (IP). Therefore, the entire suite is commonly referred to as TCP/IP. TCP provides reliable, ordered, and error-checked delivery ...

  7. Internet Control Message Protocol - Wikipedia

    en.wikipedia.org/wiki/Internet_Control_Message...

    If a host tries to send data through a router (R1) and R1 sends the data on another router (R2) and a direct path from the host to R2 is available (that is, the host and R2 are on the same subnetwork), then R1 will send a redirect message to inform the host that the best route for the destination is via R2. The host should then change its route ...

  8. Timeout (computing) - Wikipedia

    en.wikipedia.org/wiki/Timeout_(computing)

    In the Microsoft Windows and ReactOS command-line interfaces, the timeout command pauses the command processor for the specified number of seconds. In POP connections, the server will usually close a client connection after a certain period of inactivity (the timeout period). This ensures that connections do not persist forever, if the client ...

  9. Secure Shell - Wikipedia

    en.wikipedia.org/wiki/Secure_Shell

    The Secure Shell Protocol ( SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. [ 1] Its most notable applications are remote login and command-line execution. SSH was designed for Unix-like operating systems as a replacement for Telnet and unsecured remote Unix shell protocols, such as ...