Cisco Certified Network Associate (CCNA) Practice Exam

Which LMI type is the default for Frame Relay networks?

1. Autosense

2. Cisco

3. ITU

4. ANSI

The correct answer is: Autosense

The default LMI (Local Management Interface) type for Frame Relay networks is commonly Cisco. Using Cisco LMI allows devices to communicate and maintain the status of virtual circuit connections in the Frame Relay network more effectively. Cisco LMI defines a mechanism to manage the virtual interfaces and provides information about the status of the data link connection, such as the number of active virtual circuits and their statuses. It enables better performance and reliability in Frame Relay communications. Autosense does not refer to a specific LMI type; instead, it suggests that the device can automatically detect the LMI type configured on the network. This isn't a standardized LMI type but rather an approach to help routers negotiate and select the appropriate LMI type based on what is being used in the network. Understanding the commonly used LMI types, including Cisco, ANSI (American National Standards Institute), and ITU (International Telecommunication Union), helps in configuring devices correctly within a Frame Relay environment, ensuring optimal network operation.