Nedkopplingshandshake

Nedkopplingshandshake is a term used in Swedish IT to describe a coordinated exchange of signals designed to terminate a communication session gracefully. It refers to a handshake-like protocol executed at or around disconnection to ensure both parties agree the session is closed and resources are released.

In practice, a nedkopplingshandshake may involve a disconnect request from one endpoint, an acknowledgment from the other, optional negotiation about pending data or state, and a final confirmation that the connection can be closed. The exact messages and timing depend on the underlying protocol or application.

The concept is applicable across layers, from application-level protocols to transport-level termination sequences, as well as to distributed systems and messaging platforms. Examples include application-layer disconnect messages in messaging systems, or using standard close sequences in protocols that support graceful termination; in TCP, termination is handled by a FIN/ACK exchange, which serves a similar purpose though not always labeled as such in Swedish terminology.

Benefits include avoiding half-open connections, preventing data loss by flushing buffers, and enabling clean release of resources. Key considerations are reliability, idempotence of the disconnect sequence, authentication of the disconnection, and handling retries after timeouts.

The term nedkopplingshandshake is descriptive rather than a formal standard and appears primarily in Swedish-language technical discussions. If you are looking for a specific protocol, it is helpful to refer to its official termination or close sequence (for example, the TCP FIN/ACK or WebSocket close frame).