These technologies use laser-based interrogation units that convert conventional, telecommunication grade fiber-optic cables into super-dense, massive sensing arrays by measuring distributed and continuous changes in strain along the cable. This review summarizes recent progress and emerging trends in multiparameter optical fiber sensing, emphasizing techniques that enable the simultaneous measurement of temperature, strain, acoustic waves, pressure, and other environmental quantities within a single sensing network. Such capabilities. Protect critical infrastructure from external threats and monitor pipelines for leaks with the most versatile acoustic sensing solution on the market. Utilizing fiber optic cables.