Quiz Entry - updated: 2026.10.16
Besides the address problem, what are the other points in the overall assessment of perimeter security, and when is it "quite OK"?
It is inflexible (static rules don't support remote or mobile work), it works in both directions with a suitable rule set, and the growing use of cloud, outsourcing and B2B pushes for more and more holes. It is quite OK as long as everything stays at its intended place in the network and modern enhancements are added; it is in any case better than no security.
| Point | Meaning |
|---|---|
| Clean system boundary | The model draws a well-defined boundary, which is its main strength |
| Inflexible | Movement in the network (remote working, mobile working, home office) is not supported by static network rules in the basic form |
| Works both ways | With a suitable rule set it protects against break-in and against break-out (e.g. malware sending data out) |
| Growing demand for permeability | Services that are no longer on-premises (cloud, outsourced hosting, B2B cooperation) all need openings in the perimeter |
The last point is why the plain model is being eroded: every business need for an exception adds a hole, and the boundary becomes less meaningful with each one.