Below are some examples to explain services usage by using HTTP/GET and KVP encoding.
Basic WFS Requests | GetCapabilities DescribeFeatureType GetFeature

Request | Description
--- | ---
GetCapabilities Retrieve capabilities information | ^ up
WFS 1.1.0 GetCapabilities | Retrieve capabilities information by using the following parameters. HTTP KVP Request: .../services? request=GetCapabilities version=1.1.1 service=WFS
DescribeFeatureType Retrieve schema description of a FeatureType | ^ up
WFS 1.1.0 DescribeFeatureType | A DescribeFeatureType request, which results the WFS FeatureTypes. HTTP KVP Request: .../services? service=WFS version=1.1.0 request=DescribeFeatureType
GetFeature Retrieve feature instances by featuretype name. Optional constraints may be added. | ^ up
WFS 1.1.0 GetFeature StateBoundary | A GetFeature request, which retrieves all features of a type (example: StateBoundary) HTTP KVP Request: ...services? service=WFS version=1.1.0 request=GetFeature typename=app:StateBoundary namespace=xmlns(app=http://www.deegree.org/app)