I am trying to understand what an Ethernet Switch internally considers a single port.
My current understanding is that when a seller advertises an Ethernet Network Switch, like the one below, has five ports, they actually mean that you may connect to it five standard UTP cables that each hold four unshielded twisted pairs.
Moreover, I understand that Ethernet specification doesn't assume four UTPs (a single common UTP cable) but actually works on a single unshielded twisted pair.
Finally, knowing that switches forward frames to a MAC address accessible via a given port I am wondering if that means that there are actually four ports for each cable in the switching table (i.e. each unshielded twisted pair has a separate port in the table) or that a group of four pairs (a cable) is considered one port in the table.