Cisco Certified Network Professional 2026 – 400 Free Practice Questions to Pass the Exam

A status of "up/up" indicates that both the physical and data link layers of the trunk link are operational. This means that there is an active connection between the switches or network devices, and they are successfully able to send and receive data over the trunk. Specifically, "up" at the physical layer signifies that the link is physically connected, while "up" at the data link layer confirms that the link is functional and able to transfer traffic.

In practical terms, achieving a status of "up/up" is essential for trunk links because these links are used to carry traffic for multiple VLANs between network devices. When the trunk link is operationally functional, it ensures that various VLANs can communicate effectively across the network without issues, which is crucial for maintaining network segmentation and performance. Thus, a status of "up/up" confirms that the trunk link is not only established but also ready for data transmission.