单项选择题

A. The two different hosts will need to be in the same VLAN in order for the ping command to be  successful.
B. A Layer 3 device is needed for the ping command to be successful.
C. The ping command will be successful without any further configuration changes.
D. A trunk port will need to be configured on the link between Sw_A and Sw_B for the ping  command to be successful.