about CAM table overflow attack?

Hello, all.

I have read some documents about CAM table overflow(or mac flooding, switch jam) attack.
I have some questions about this.

If some attacker executes macof for sometime, so CAM tables would be overflowed.

1. then attacker can see other traffic only which in a same VLAN?

2. or attacker can see all traffic(over vlan) which switch services, like dummy hub?

Thanks in advance.

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