A network engineer is troubleshooting a performance issue between two hosts connected to a Cisco Catalyst 3850 switch. The engineer wants to capture all traffic sent and received by Host A (Gi1/0/1) and send it to a monitoring station connected to Gi1/0/24. The engineer configures 'monitor session 1 source interface Gi1/0/1 both' and 'monitor session 1 destination interface Gi1/0/24'. However, the monitoring station receives only traffic sent by Host A, not traffic received. What is the most likely cause?

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