Figure 6.1-1 presents the general communication model of DICOM which spans network and storage media interchange communications. The DICOM Application Entities may rely on either one of the following boundaries:
a. the OSI Upper Layer Service, which provides independence from specific physical networking communication support
b. the DICOM File Service, which provides access to Storage Media independently from specific physical media storage formats and file structures.
Figure 6.1-1 General DICOM Communication Model