Which three statements accurately describe duplex and speed settings on cisco 2960 switches?
a. An autonegotiation failure can result in connectivity issues.
b. When the speed is set to 1000 Mb/s, the switch ports will operate in full-duplex mode.
c. The duplex and speed settings of each switch port can be manually configured.
d. Enabling autonegotiation on a hub will prevent mismatched port speeds when connecting the hub to the switch.
e. By default, the speed is set to 100 Mb/s and the duplex mode is set to autonegotiation.
f. By default, the autonegotiation feature is disabled.