Cisco Certified Network Professional Practice Test 2025 – Your All-in-One Guide to Exam Success!

The command to set a VLAN's root priority is formatted correctly in the chosen option. This command allows network administrators to effectively control which switch will become the root bridge in a Spanning Tree Protocol (STP) topology. By adjusting the root priority, you can influence the selection process of the root bridge to ensure that the most suitable switch, typically the one with the best features and capabilities, is selected to manage the VLAN's traffic.

Using this command, administrators can specify either a primary or secondary role for the switch regarding its root priority. The 'primary' option will set a lower value for the bridge priority, effectively elevating the switch above others in the STP calculation. Similarly, the 'secondary' option allows for an alternative, slightly higher priority setting to influence which switch might act as the root if the primary becomes unavailable.

This command's versatility is important for network designs that require redundant paths and robust failover mechanisms, which are crucial for maintaining network reliability. By utilizing this command, you help enforce better control over network traffic paths and reduce potential for loops, which can severely impact network performance.