Question: ComputerA and ComputerB are located on the same subnet in an organizations TCP/IP local area network (LAN). ComputerA needs to send a message to ComputerB.

ComputerA and ComputerB are located on the same subnet in an organizations TCP/IP local area network (LAN). ComputerA needs to send a message to ComputerB. ComputerA knows ComputerBs IP address, but does not know ComputerBs MAC address.

From the following statements, select all that correctly describe the given scenario.

ComputerA can send a message directly to ComputerB without knowing ComputerB's MAC address.

1. Before sending a message to ComputerB, ComputerA must first issue an ARP broadcast to obtain ComputerBs MAC address.

2. ARP packets used in this scenario are sent at the application layer.

3. Before sending a message to ComputerB, ComputerA sends an ARP request only to a router, and the router responds with ComputerB's MAC address.

4. After ComputerA learns ComputerBs MAC address, the MAC address is stored in ComputerAs address table for future use.

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