This indicates the current operational mode of this port.
This value is a logical OR of the current operational mode,
where each technology is given the values below:
other(1) Undefined, or ability not known
Auto-Negotiation(2) Auto-Negotiation
10BASE-T(4) 10BASE-T
100BASE-TX(8) 100BASE-TX
1000BASE(16) 1000BASE
For example, a port that has auto-negotiated to a speed of
100BASE-TX would have a value of 10 (2 + 8).