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How can the Cisco Packet Tracer show the port's name?
the GNS3 can show its interface name.
You can set the Interface in Cisco Packet Tracer menu Options -> Preferences -> Interface,
then check the Always Show Port Labels in Logical Workspace.
Always Show Port Labels in Logical Workspace
Go to "Options" --> "Preferences" --> "Interfaces" Then Check "Always Shows Ports and Labels"
Required, but never shown