This read-only integer reports an estimate of the interface's current bandwidth in bits per second, falling back to the nominal rated bandwidth for interfaces whose speed doesn't vary or can't be accurately measured. An admin uses this to confirm the negotiated link speed of a NIC, such as after a cabling or switch-port change. For example, cpqOsNetworkCurrentBandWidth unexpectedly reporting a lower value than the NIC's rated speed could indicate the link auto-negotiated to a slower speed than intended.