Which is a type of network isolation that physically separates a network from all other networks?

• A. Data Zone
• B. Region-Based Segmentation
• C. Air Gap
• D. Jump Box

Answer: (C)

The main concept here is physical network isolation. An air gap means the network is physically disconnected from every other network—no cables, no wireless links, and no indirect paths. Because there is no network connectivity at all, there’s effectively no remote channel for attackers to exploit, and data transfer must be done manually and under strict controls, which greatly reduces the risk of malware or exfiltration slipping in or out.

Other terms describe different approaches to sharing or controlling access. A data zone isn’t a standard way to describe complete physical disconnection; it implies a security boundary within a network rather than an absolute separation. Region-based segmentation divides networks by geographic or logical regions but still relies on gateways or routers to move data between regions. A jump box is simply a controlled entry point used to reach devices in another network, not a physical gap—the networks remain connected, just accessed through a secured intermediary.