Is the holder of an F2 visa allowed to travel abroad (out of America)?

I am planning to pursue graduate studies (MS or direct PhD) in America with my wife. I have a few questions about F2 visa.

1 - Is the F2 visa single or multiple entry like the F1 visa?

2 - Is my wife (with an F2 visa) allowed to travel back to our country (Iran) during my study? (She has to travel to Iran once or twice a year to visit her family)

Normally F2 visa is also a multiple entry visa.

During the validity of visa she can travel to home country and return