MCS-51 Family

Hi everyone,
I'm a newbie in the field of microcontrollers .
I have several questions referring to the MCS-51 microcontrollers family:

• 
  What is the relationship between ALE, port P0 and port P2 of the 8051 family?
  Referring to the port terminals (P0,P1,P2,P3), Is it possible to directly connect in any of the terminals a buzzer that consumes 120mA, and that is connected to the microcontroller?

I will be thankful if anyone answer me.