A bit string that identifies the ports that this station has generated traffic to or from. The bits correspond to ports, with bits and ports numbered from right to left so that bit 0 represents the CPU, bit 1 represents port 1, and so forth. For example, the returned string 01 4D can be expanded to: 00000001 01001101 binary representation of object string xxxxxxx8 7654321C ports corresponding to bits This indicates ports 8, 6, 3, 2 and the CPU. The size of this string is adjusted to include all ports with traffic.