SCNA (an abbreviation of Sun Certified Network Administrator) is a certification for system administrators and covers LANs and Solaris. SCNA (an abbreviation of Sun Certified Network Administrator) is a certification for system administrators and covers LANs and Solaris. Candidates must pass a certification exam. The examination includes multiple-choice, scenario-based questions, drag-and-drop questions, and tests the candidate on Solaris network administration topics including how to configure and manage the network interface layer, the network (Internet and Transport Layers), network applications, and the Solaris IP Filter.