Which device sits at the edge of a network to regulate traffic and enforce rules?

• A. Shadow IT
• B. Gateway Device
• C. Baseline
• D. Stakeholder

Answer: (B)

At the network edge, the device that regulates traffic and enforces rules acts as the boundary controller between internal networks and the outside world. This gateway device handles policy enforcement, traffic filtering, access control, and often functions like NAT, VPN termination, and sometimes intrusion prevention. It sits at the edge to ensure that only permitted traffic crosses the boundary and that security policies are applied consistently as data enters or leaves the network. That’s why the gateway device is the correct concept.

Shadow IT refers to unsanctioned technology use, which is about people and systems, not a boundary device. A baseline is a standard configuration or security setting, not an active device that regulates traffic. A stakeholder is a person or group with an interest in the system, not a network device.