vocabulary:
  name: VNC Vocabulary
  description: >-
    Domain vocabulary for RealVNC's Virtual Network Computing technology,
    covering remote desktop protocols, cloud connectivity, and SDK concepts.
  version: '2026-05-03'
  terms:
    - term: VNC
      definition: >-
        Virtual Network Computing — a graphical desktop-sharing system
        using the Remote Frame Buffer (RFB) protocol to remotely control
        another computer's display and input devices over a network.
      tags:
        - Protocol
        - Remote Desktop

    - term: Cloud Address
      definition: >-
        A stable alphanumeric identifier assigned to a device participating
        in VNC Cloud. Used as a rendezvous point for connection brokering
        without requiring direct network access between endpoints.
      tags:
        - VNC Cloud
        - Connectivity

    - term: VNC Cloud
      definition: >-
        RealVNC's managed cloud relay and brokering service that enables
        devices to establish remote connections without direct network
        reachability, using cloud addresses as identifiers.
      tags:
        - Cloud
        - Brokering

    - term: Viewer
      definition: >-
        The client component of a VNC session that displays the remote
        screen and sends input events (keyboard, mouse, touch) to the server.
      tags:
        - SDK
        - Client

    - term: Server
      definition: >-
        The host component of a VNC session that captures the local display
        and accepts input events from connected viewers.
      tags:
        - SDK
        - Host

    - term: RFB Protocol
      definition: >-
        Remote Frame Buffer protocol — the underlying network protocol
        used by VNC for transmitting screen updates and input events.
        Operates at the framebuffer level making it application-independent.
      tags:
        - Protocol

    - term: Access Control
      definition: >-
        Configuration specifying which groups or specific cloud addresses
        are permitted to initiate connections to a given cloud address.
      tags:
        - Security
        - Configuration

    - term: Group
      definition: >-
        A logical label applied to one or more cloud addresses for
        organizational or access-control purposes.
      tags:
        - Organization
        - Access Control

    - term: AllowedActions
      definition: >-
        A cloud address property indicating whether the device acts as
        a connection initiator (connect) or a connection acceptor (listen).
      tags:
        - Configuration

    - term: ETag
      definition: >-
        An HTTP header value used for optimistic concurrency control
        when updating cloud address resources to prevent conflicting writes.
      tags:
        - HTTP
        - Concurrency

    - term: Gang Scheduling
      definition: >-
        Not applicable to VNC — see Volcano vocabulary for this term.
      tags:
        - Out Of Scope

    - term: Direct TCP Connection
      definition: >-
        A VNC connection mode where Viewer and Server communicate directly
        over a TCP socket without cloud brokering, requiring network reachability.
      tags:
        - Connectivity
        - Protocol

    - term: Direct UDP Connection
      definition: >-
        A VNC connection mode using UDP for lower-latency transmission
        where network conditions permit.
      tags:
        - Connectivity
        - Protocol

    - term: SDK
      definition: >-
        The VNC Developer SDK providing C, Java, Python, .NET, and JavaScript
        language bindings for embedding Viewer and Server functionality into apps.
      tags:
        - Developer
        - SDK