The type of network that can be secured entirely through physical safeguards is a LAN (Local Area Network).
LANs are typically confined to a limited geographic area, such as a home, office, or building, making it feasible to control access through physical means like locked doors, security personnel, and access control systems. In contrast, WLANs, WANs, and VPNs involve wireless connections, broader geographical areas, or tunneling methods, which cannot rely solely on physical safeguards for security.
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