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  2. Travelling salesman problem - Wikipedia

    en.wikipedia.org/wiki/Travelling_salesman_problem

    In the metric TSP, also known as delta-TSP or Δ-TSP, the intercity distances satisfy the triangle inequality. A very natural restriction of the TSP is to require that the distances between cities form a metric to satisfy the triangle inequality; that is, the direct connection from A to B is never farther than the route via intermediate C:

  3. Tunnel Setup Protocol - Wikipedia

    en.wikipedia.org/wiki/Tunnel_Setup_Protocol

    A TSP session is initiated by the TSP client in the goal of establishing an end-to-end tunnel with the TSP server (tunnel broker). The session consists of a basic exchange of XML-encoded data using TCP or UDP. After the negotiation of tunnel setup parameters, the session is terminated and the client undertakes the task of configuring its local ...

  4. TCP reset attack - Wikipedia

    en.wikipedia.org/wiki/TCP_reset_attack

    However, lacking the original context and unable to process them appropriately, Computer A typically issues a TCP reset signal to Computer B. This reset informs Computer B of the failure in the connection, prompting the user at Computer B to either attempt reestablishing the connection or take alternative actions as necessary.

  5. Packet loss - Wikipedia

    en.wikipedia.org/wiki/Packet_loss

    In cases where quality of service is rate limiting a connection, e.g., using a leaky bucket algorithm, packets may be intentionally dropped in order to slow down specific services to ensure available bandwidth for other services marked with higher importance. For this reason, packet loss is not necessarily an indication of poor connection ...

  6. Explicit Congestion Notification - Wikipedia

    en.wikipedia.org/wiki/Explicit_Congestion...

    Explicit Congestion Notification (ECN) is an extension to the Internet Protocol and to the Transmission Control Protocol and is defined in RFC 3168 (2001). ECN allows end-to-end notification of network congestion without dropping packets.

  7. Keepalive - Wikipedia

    en.wikipedia.org/wiki/Keepalive

    Typically, TCP Keepalives are sent every 45 or 60 seconds on an idle TCP connection, and the connection is dropped after 3 sequential ACKs are missed. This varies by host, e.g. by default, Windows PCs send the first TCP Keepalive packet after 7200000ms (2 hours), then send 5 Keepalives at 1000ms intervals, dropping the connection if there is no ...

  8. Internet outage - Wikipedia

    en.wikipedia.org/wiki/Internet_outage

    Electronic information stand without an internet connection, at Schiphol Airport, Netherlands. An Internet outage or Internet blackout or Internet shutdown is the complete or partial failure of the internet services. It can occur due to censorship, cyberattacks, disasters, [1] police or security services actions [2] or errors.

  9. Transmission Control Protocol - Wikipedia

    en.wikipedia.org/wiki/Transmission_Control_Protocol

    Connection termination Detailed TCP close() sequence diagram. The connection termination phase uses a four-way handshake, with each side of the connection terminating independently. When an endpoint wishes to stop its half of the connection, it transmits a FIN packet, which the other end acknowledges with an ACK.