Typically with Layer 4 switching, a Common Gateway Interface request looks no different than a Web-enabled SAP application or streaming audio request, even though all of these requests have very different quality of service (QoS) requirements.

• 一般来说，利用第4层交换时，一个公共网关接口请求看上去与Web允许的SAP应用程序或流式音频请求没有区别，即使所有这些请求具有差别极大的服务质量（QoS）要求。