CSU - Channel Service Unit
A Channel Service Unit (CSU) is a networking device that operates at the physical layer (Layer 1) of the OSI model. It is typically used in digital communication networks to provide functions related to the interface between data terminal equipment (DTE) and a digital communication link, such as a T1 or T3 line.
Security+ may cover basic networking concepts and devices. While CSUs are not the primary focus of security-related topics, understanding their role in physical layer connectivity and their association with digital communication lines may provide a foundational understanding of networking infrastructure.
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