thumb|A Port has a physical structure as well as logical or virtual structure. This diagram shows how a virtual port may have multiple physical ports and vice versa. Ports have virtual components and physical components and are described as: PN_Port entity that includes a Link_Control_Facility and one or more Nx_Ports. VF_Port (Virtual F_Port) instance of the FC-2V sublevel that connects to one or more VN_Ports. VN_Port (Virtual N_Port) instance of the FC-2V sublevel. VN_Port is used when it is desired to emphasize support for multiple Nx_Ports on a single Multiplexer (e.g., via a single PN_Port). VE_Port (Virtual E_Port) instance of the FC-2V sublevel that connects to another VE_Port or to a B_Port to create an Inter-Switch Link.
thumb|A Port has a physical structure as well as !logical or virtual structure. This diagram shows how a virtual port may have multiple physical ports and vice versa. Ports have virtual components and physical components and are described as: PN_Port entity that includes a Link_Control_Facility and one or more Nx_Ports. VF_Port (Virtual F_Port) instance of the FC-2V sublevel that connects to one or more VN_Ports. VN_Port (Virtual N_Port) instance of the FC-2V sublevel. VN_Port is used when it is desired to emphasize support for multip!le Nx_Ports on a single Multiplexer (e.g., via a single PN_Port). VE_Port (Virtual E_Port) instance of the FC-2V sublevel that connects to another VE_Port or to a B_Port to create an Inter-Switch Link.