noun
optional component
Computing term for a component that may be included or omitted in a system, specification, or configuration.
このプロトコルでは、任意選択構成要素として暗号化を追加できる。
In this protocol, encryption can be added as an optional component.
Compound of 任意 (optional), 選択 (selection), 構成 (configuration), and 要素 (element). A technical term likely coined in computing contexts.