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Access control in the context of network storage fundamentally pertains to the regulation of user permissions for networked resources. This involves defining which users or user groups can access specific data or resources, what actions they can perform on that data (such as read, write, or execute), and under what circumstances they may gain access.

Effective access control is vital for maintaining data integrity, confidentiality, and availability within a networked environment. It utilizes various techniques and policies, including role-based access control (RBAC), discretionary access control (DAC), and mandatory access control (MAC) to ensure that only authorized individuals can access sensitive information.

Other concepts, while critical for overall data security and management, do not directly fall under the definition of access control. For instance, managing data encryption methods focuses specifically on data protection rather than the permissions surrounding who can access the data. Setting up physical security for data centers pertains to protecting the physical hardware and infrastructure rather than controlling user access to the data stored on it. Finally, creating resilient backup systems is about data recovery strategies rather than managing the permissions and access rights to the data itself.