Cisco Certified Network Associate (CCNA) Practice Exam

At which intervals are status and full-status LMIs sent from Frame Relay switches to DTE routers?

1. 5 and 30 seconds

2. 10 and 60 seconds

3. 15 and 45 seconds

4. 20 and 50 seconds

The correct answer is: 10 and 60 seconds

The correct answer is that status and full-status Local Management Interfaces (LMIs) are sent at intervals of 10 and 60 seconds. In Frame Relay networks, these LMIs are crucial for maintaining the status of the link between the Data Terminal Equipment (DTE) and the Data Communications Equipment (DCE). The status LMI provides updates about the state of the logical connections, while the full-status LMI gives a comprehensive view, including all relevant information about those connections. Understanding the timing of these signals is critical for network uptime and responsiveness. If the routers do not receive these LMIs within the specified intervals, it can indicate potential issues with the connection, prompting diagnostic measures to ensure the reliability of the Frame Relay service. The intervals (10 seconds for status LMIs and 60 seconds for full-status LMIs) are designed to balance the need for timely updates with the efficiency of network resource usage.