Send and Receive String Explanation in a Http Monitor

Subrun,

1. A blank receive string means that the HTTP monitor will mark its resource as UP if any response is received. A receive string is mainly used to parse the response and check that the proper resource is responding.

    

2. Changing the '/index.html' will change what resource that the request is looking for. A request with '/index.html' will attempt to return the contents of the 'index.html' file on the server the request was send to. If a GET request specified '/example.html' instead of '/index.html', it would attempt to return the contents of the 'example.html' file.

    

Here and here is some more documentation about HTTP monitors.