This tutorial slide zone is being gradually upgraded to SysML1.7 and latest MagicDraw/Cameo tool feature support examples but most is still applicable.
Before we look at specifics of Ports (such as conjugation), please note this carefully:
Until you have really mastered regular Ports there is no sense in fussing over whether you "should" use ProxyPorts or FullPorts (and the answer is often "it does not matter because the client does not care"). We start with regular Ports!
Also: