The KS8995 contains five 10/100 physical layer

transceivers, five MAC (Media Access Control) units

with an integrated layer 2 switch. The device runs in

two modes. The first mode is a five port integrated

switch and the second is as a five port switch with the

fifth port decoupled from the physical port. In this

mode access to the fifth MAC is provided using a

MII (Media Independent Interface).