Quiz Entry - updated: 2026.07.14
In SPEED mode on a Cisco switch, what do the different port LED colors mean?
Off = 10 Mbps, green = 100 Mbps, blinking green = 1000 Mbps (Gigabit).
| LED State | Speed |
|---|---|
| Off | 10 Mbps |
| Green | 100 Mbps |
| Blinking Green | 1000 Mbps |
In DUPLEX mode:
| LED State | Duplex |
|---|---|
| Off | Half-duplex |
| Green | Full-duplex |
Press the Mode button to cycle to SPEED or DUPLEX mode, then read each port's LED.