Cisco Certified Network Professional Practice Test 2026 – Your All-in-One Guide to Exam Success!

The "No Traffic" state in an 802.1X setup typically occurs when the switch is configured for 802.1X authentication, but the endpoint device, such as a PC, is not capable of or does not have 802.1X enabled. In this scenario, the switch cannot authenticate the device, resulting in no network traffic being allowed from that endpoint since the switch is configured to expect authentication through 802.1X.

When the switch is engaged in 802.1X, it will not forward frames from any device that has not successfully authenticated. If the PC lacks 802.1X capabilities, it remains unauthenticated, and consequently, it cannot communicate over the network—hence the designation of "No Traffic".

The other options imply different configurations that do not create a "No Traffic" state. For instance, if both the switch and the PC support 802.1X, the authentication process can occur, and traffic may begin to flow once the device authenticates successfully. If the switch does not support 802.1X at all, it would operate normally, allowing traffic regardless of the PC's capabilities. Additionally, the situation where the PC supports 802.1X while the switch