What is required if devices on different VLANs wish to communicate with each other?

What is required if devices on different VLANs wish to communicate with each other?
A . Devices on different VLANs cannot communicate with each other.
B . Devices on different VLANs can communicate with each other as long as they are connected to the same switch.
C . Devices on different VLANs can communicate with each other as long as the switches they are attached to are connected to each other with an Ethernet connection.
D . Devices on different VLANs can communicate with each other if there is an IP router to connect the VLANs.

View Answer

Answer: D