4 PCs are connected to a switch and this switch is aware of their MAC addresses (all 4 PCs). Computer A and Computer D have not communicated ever earlier hence they both don't have their ARP table updated with each other's MAC address.
Computer A wants to communicate with Computer D, hence it sends out an ARP request for Computer D's MAC address. This ARP would be a broadcast message (with FF:FF:FF:FF:FF:FF as destination MAC in ARP packet).
I'd want to understand as how switch will take it up as it's already aware of Computer D's MAC but Computer A is not. Will the switch let Computer D respond to the ARP messgage (the broadcast) or drop that ARP request and directly route Computer A's packet to Computer D (since switch is already aware of Computer D's MAC)?