What are the IDs assigned to ports like USB, Ethernet, and video ports called?

 What are the IDs assigned to ports like USB, Ethernet, and video ports called?

• MAC addresses
• I/O addresses
• Subnets
• Nodes         

EXPLANATION

Each I/O device connected to your computer is mapped to a unique I/O (Input/Output) address. These addresses are assigned to every I/O port on your computer, including USB, Firewire, Ethernet, VGA, and DVI ports, as well as any other ports your computer might have.

SOURCE

https://techterms.com/definition/ioaddress