Implementing Cisco IP Switched Networks (SWITCH v2-0) (#537)

After reviewing UDLD status on switch ports, an engineer notices that the switch LEDs are green. Which statement describes what this indicates about the status of the port?

The port is fully operational and no known issues are detected.
The bidirectional status of “unknown” indicates that the port will go into the disabled state because it stopped receiving UDLD packets from its neighbor.
UDLD moved into aggressive mode after inconsistent acknowledgements were detected.
The UDLD port is placed in the “unknown” state for 5 seconds until the next UDLD packet is received on the interface.�