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  2. UDP hole punching - Wikipedia

    en.wikipedia.org/wiki/UDP_hole_punching

    UDP hole punching is a method for establishing bidirectional UDP connections between Internet hosts in private networks using network address translators. The technique is not applicable in all scenarios or with all types of NATs, as NAT operating characteristics are not standardized.

  3. Hole punching (networking) - Wikipedia

    en.wikipedia.org/wiki/Hole_punching_(networking)

    To punch a hole, each client connects to an unrestricted third-party server that temporarily stores external and internal address and port information for each client. The server then relays each client's information to the other, and using that information each client tries to establish direct connection; as a result of the connections using ...

  4. WireGuard - Wikipedia

    en.wikipedia.org/wiki/WireGuard

    WireGuard is a communication protocol and free and open-source software that implements encrypted virtual private networks (VPNs). [5] It aims to be lighter and better performing than IPsec and OpenVPN , two common tunneling protocols . [ 6 ]

  5. Plugboard - Wikipedia

    en.wikipedia.org/wiki/Plugboard

    A reproducing punch might have an additional read station after the punch station for verification. Punch magnets Machines that could punch cards, such as a reproducing punch, had hub entries for each card column. An impulse to one of those entries triggered the electromagnet that initiated the punching of a hole at that column position.

  6. Punch down tool - Wikipedia

    en.wikipedia.org/wiki/Punch_down_tool

    A punch down tool, punchdown tool, IDC tool, or a Krone tool (named after the Krone LSA-PLUS connector), is a small hand tool used by telecommunication and network technicians. It is used for inserting wire into insulation-displacement connectors on punch down blocks , patch panels , keystone modules , and surface mount boxes (also known as ...

  7. Firewall pinhole - Wikipedia

    en.wikipedia.org/wiki/Firewall_pinhole

    In computer networking, a firewall pinhole is a port that is not protected by a firewall to allow a particular application to gain access to a service on a host in the network protected by the firewall.

  8. Keypunch - Wikipedia

    en.wikipedia.org/wiki/Keypunch

    The IBM 056 verifier used most of the same mechanical and electrical components as the 024/026 keypunches with the exception of the punch unit and print head. The punch unit had sensing pins in place of the punches. The holes sensed or not sensed would trip a contact bail when the configuration was other than that entered by the verifier operator.

  9. Punched card input/output - Wikipedia

    en.wikipedia.org/wiki/Punched_card_input/output

    An IBM 80-column punched card of the type most widely used in the 20th century IBM 1442 card reader/punch for 80 column cards. A computer punched card reader or just computer card reader is a computer input device used to read computer programs in either source or executable form and data from punched cards.