Multiple interfaces are located on the same adapter, and each one of them is set with similar names and unique attributes, such as - IRQ numbers.
Physical interfaces naming convention description:
Physical interfaces are automatically assigned names based on the slot where the network adapter is installed.
They are identified by ''eth'' name, the slot number of the adapter and port number on the adapter (if multi-port adapter).
Common physical configuration, when the slot has one port. Interface name: eth<slot_number> Rare physical configuration, when slot has multiple ports. Interface name: eth<slot_number>-<port_number>