多项选择题 Which three statements accurately describe layer 2 Ethernet switches?（）

多项选择题 Refer to the exhibit.What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN?（）

单项选择题 Refer to the graphic.Host A is communicating with the seiver. What will be the source MAC address of the frames received by Host A from the server?（）