MGCP is also known as what type of protocol?

MGCP, or Media Gateway Control Protocol, is classified as a Master/Slave protocol. In this type of communication setup, one device (the master) controls the actions of other devices (the slaves). MGCP operates by allowing the media gateway (which acts as a slave) to receive commands from a media gateway controller (which acts as the master). The controller dictates the operations, signaling, and controls the media gateways within a Voice over IP (VoIP) environment. This hierarchical relationship is essential for managing the various functions involved in media handling, such as call setup and teardown.

The other options reflect different communication paradigms. Peer-to-Peer involves direct communication where each device can act as both a client and a server, which isn't the case for MGCP. Client/Server refers to a model where a server provides resources or services and a client accesses them, but this relationship is more cooperative rather than hierarchical. Simplex communication only allows one-way transmission, which does not accurately describe the interactive nature of how MGCP operates, where commands and responses are exchanged.