An office network's Gigabit Ethernet connection is experiencing slow data transfer speeds. After conducting an initial assessment, the technician observes no link light indicators on the network switch and intermittent blinking on the workstation's NIC. Prior to the slow down, a new patch cable was installed between the wall jack and the workstation. Which of the following is MOST likely causing the transfer speed issue?
Incorrect pinout of the new patch cable
The workstation was accidentally switched to a different VLAN
Wrong transceiver installed on the network switch
Dirty optical cables between the wall jack and workstation