I am pretty new to ArcGIS Server and am building a map applications using the Javascript API. I can easily load the map layer below by adding it as a ArcGISDynamicMapServiceLayer
http://www.parkcounty.org/ArcGIS/rest/services/Roads_Map/MapServer/
As you can see there are many layers as part of the above url. What if I just want to load the roads layer as a ArcGISDynamicMapServiceLayer? I've tried replacing the above url with the road specific URL below and that does not seem to work
http://www.parkcounty.org/ArcGIS/rest/services/Roads_Map/MapServer//2
Is there something else I can do as the front end developer or is it up to those that are hosting and managing the server to create a unique url for the roads?