Question

A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame?

A. Devices in VLAN 20 and the management VLAN see the frame.
B. Only devices that are connected to the local switch see the frame.
C. Only devices in VLAN 20 see the frame.
D. All devices in all VLANs see the frame."

Answer 1

A broadcast Ethernet frame sent by a device in VLAN 20 will only be seen by devices within VLAN 20, due to VLANs limiting broadcast domains to enhance network security and efficiency.

Step-by-step explanation:

When a device in VLAN 20 sends a broadcast Ethernet frame, only the devices that are part of VLAN 20 will see the frame. Virtual Local Area Networks (VLANs) are used to segment network traffic logically, and they restrict broadcast traffic to within the same VLAN. This isolation comes from the way VLANs are designed to operate within a network—broadcasts are not forwarded between VLANs without the help of a router or a Layer 3 switch configured to do so.

Therefore, the management VLAN or devices on other VLANs will not see the broadcast unless specifically configured to share VLAN 20's broadcast domain. This behavior serves to reduce unnecessary traffic on the network and increases security by limiting the broadcast domain to a single VLAN.