How to find out arcgis rest service source type

Question

Step 1

 

 

https://maps2.eulesstx.gov:6443/arcgis/rest/services/BaseMap/MapServer/18

 

 

 

 

 

 

Step 2

 

 

 

 

 

 

 

 

 

Step 3

 

 

 

Step 4

 

Done.