The exhibit shows a Fibre Channel (FC) switch connected to another FC switch. The port "X" is used for inter-switch link (ISL) connectivity, which is characteristic of anE_port (Expansion Port).
F_port (Fabric port):Connects an N_port (host or storage device) to a switch.
N_port (Node port):End device port in FC networks (like HBA in hosts or storage).
NL_port (Node Loop port):Used for Arbitrated Loop topologies.
E_port:Connects two FC switches together for ISL, which is exactly what's shown in the exhibit.
[Reference:Dell Information Storage and Management Foundations 2023 Study Guide, Section: FC SAN Components and Topologies., ]
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