Which computing model contains the protocols and mechanisms providing the interface between the infrastructure and other layers?

Overstructure is not a recognized layer in the CSA cloud computing logical model.

In the CSA cloud computing logical model, the metastructure layer sits between the infrastructure and upper layers, providing the protocols, APIs, and management mechanisms that allow other layers to interact with underlying infrastructure. It is sometimes called the 'glue' layer because it exposes infrastructure capabilities to higher-level services and management planes. Understanding this layer is critical for cloud security because weaknesses here affect all layers above it.

The infrastructure layer consists of the physical and virtual compute, network, and storage resources, not the interfacing protocols between layers.

The infostructure layer deals with data and information assets, including content management and data governance, not inter-layer protocols.

The applistructure layer covers applications and application services such as code and message queues, not interfacing protocols.