The pool of threads and overlapped operations guarantee a good level of performance to the ISAPI.
They fall into two categories: ISAPI filters and external devices.
這些產品分為兩大類:ISAPI過濾器和外部設備。
IIS可以自行處理請求(如HTML頁面、圖像以及其他靜態內容),或者將請求路由到ISAPI擴展。
Requests can be handled natively by IIS—as are HTML pages, images, and other static content—or IIS can route the request to an ISAPI extension.