I am very confused with some equipment at work (video encoders). They have 6 Ethernet ports: 2 for management and 4 for data. But the data ports are labelled like 2 for data input and 2 for data output. I wonder why they should be different, if an Ethernet port trasmit and receive at the same time.
This is un except from the manual:
The unit has four Ethernet ports - two for data input, and two for data output and will respond to ARPs, pings and other low-level Ethernet traffic. The ports are accessible via RJ-45 connectors on the rear panel of the chassis. These are labeled Ge 1, Ge 2, Ge 3 and Ge 4. Ge 1 and Ge 2 are used for data input, while Ge 3 and Ge 4 are data output.
Thanks for your help in advance.