Question

Host A (VLAN 10) wants to send a packet to Host B (VLAN 20) on the same physical switch. What actually happens at Layer 2/3 to deliver this packet?

Q: Answer-Host A (VLAN 10) wants to send a packet to Host B (VLAN 20) on the same physical switch. What actual...

VLANs are separate broadcastLayer-2 domains. ARP requests dont cross VLAN boundaries, so inter-VLAN traffic must be routed by a Layer-3 device router-on-a-stick or L3 switch. Host A ARPs for its gateway, and the gateway performs the actual routing to VLAN 20.

A Host A directly ARPs for Host B's MAC across VLANs since switches broadcast ARP requests to all VLANs by default

B Host A ARPs for the default gateway's MAC (its own subnet), sends the frame to the gateway/router, which routes the packet to VLAN 20, and Host B replies via the same path

C Host A sends the frame using Host B's IP as the destination MAC directly, and the switch translates it

D The switch automatically bridges VLAN 10 and VLAN 20 frames without any routing since they share the same physical hardware

E VLANs cannot communicate under any circumstances, so the packet is dropped

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Host A (VLAN 10) wants to send a packet to Host B (VLAN 20) on the same physical switch. What actually happens at Layer 2/3 to deliver this packet?

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