Which term denotes a network boundary device that controls traffic between SDP and a firewall?

Which term denotes a network boundary device that controls traffic between SDP and a firewall?

• A. Perimeter Router
• B. ECN
• C. ERS
• D. JRSS

Answer: (A)

Think about the role of a device that sits at the edge of a network and controls how traffic moves between two security boundaries. A perimeter router is designed for exactly that: it sits at the network boundary between the SDP-controlled segment and the firewall, routing traffic and enforcing policy so that only legitimate flows reach the firewall for inspection. This makes it the logical junction that channels, filters, and directs traffic from the SDP side toward the firewall, helping to enforce segmentation and access controls at the edge. Explicit Congestion Notification is a mechanism for signaling congestion within IP networks, not a boundary device. ERS, depending on context, isn’t a standard term for a boundary device between SDP and a firewall, and JRSS refers to a broader DoD network architecture rather than a single boundary device.

Think about the role of a device that sits at the edge of a network and controls how traffic moves between two security boundaries. A perimeter router is designed for exactly that: it sits at the network boundary between the SDP-controlled segment and the firewall, routing traffic and enforcing policy so that only legitimate flows reach the firewall for inspection. This makes it the logical junction that channels, filters, and directs traffic from the SDP side toward the firewall, helping to enforce segmentation and access controls at the edge.

Explicit Congestion Notification is a mechanism for signaling congestion within IP networks, not a boundary device. ERS, depending on context, isn’t a standard term for a boundary device between SDP and a firewall, and JRSS refers to a broader DoD network architecture rather than a single boundary device.