If Spanning Tree Protocol (STP) is disabled on the network consisting of switches, a Layer 2 loop will definitely occur.

A Layer 2 loop occurs only when there are redundant physical paths in a network topology. The Spanning Tree Protocol (STP) is designed to prevent loops in such redundant topologies by logically blocking some paths. However, if the physical network topology is inherently loop-free (e.g., a linear chain or a simple star topology), a Layer 2 loop cannot form, regardless of whether STP is enabled or disabled. The statement's use of the word "definitely" makes it incorrect, as the occurrence of a loop is conditional on the physical topology.

This is a True/False question. The statement is false because the formation of a Layer 2 loop is contingent upon a physical topology with redundant links, not merely the absence of STP.

Huawei HCIA-Datacom V1.0 Training Material. In the "STP Fundamentals" section, it is explained that STP's primary function is to "eliminate loops on a Layer 2 network" by blocking redundant links. This implies that loops are a feature of networks with redundant links.

Radia Perlman, "Interconnections: Bridges, Routers, Switches, and Internetworking Protocols", 2nd Edition, Addison-Wesley Professional. Chapter 3, "The Spanning Tree Algorithm," describes the problem of loops arising from redundant topologies and the algorithm's role in resolving them. It does not state that disabling the algorithm creates a loop in any topology.