为何真实的测试需要的是仿真，而不仅仅是第4至7层的模拟

While seemingly subtle, the difference between emulation and simulation are crucial when it comes to ensuring realistic testing with reliable, repeatable results.

In order to have confidence in your systems, you need to continually test and monitor them with realistic testing scenarios. This requires testing with emulation and not settling for just simulated scenarios that resemble but do not replicate, your real world environment.

This white paper discusses the benefits of emulation over simulation when considering real-world testing scenarios in Layers 4-7.