A user reports intermittent loss of connectivity to network resources on the local LAN throughout the workday. After questioning the user, you discover that the connectivity issues align with the times when large file transfers are initiated from their workstation. The workstation is connected to the network via an Ethernet cable. Based on these symptoms, what could be the most likely cause of the intermittent loss of connectivity?
Faulty Ethernet cable
Incorrect VLAN assignment
Network congestion due to high traffic volumes
Mismatched duplex settings