Cisco Updated 350-401 Exam Questions and Answers by evie-mae

The question pertains to configuring DSW1 as the root bridge for VLAN 10 and 20. In the context of MST (Multiple Spanning Tree), the priority values determine which switch becomes the root bridge, with lower values indicating higher priority. Options A and D are correct because they set the priority for MST instance 1, which can be mapped to VLANs 10 and 20, ensuring DSW1 has a lower priority and thus becomes the root bridge.

The GRE tunnel is disabled due to recursive routing, which occurs when the router learns the destination IP address for the tunnel interface through the tunnel itself. This creates a loop where the tunnel attempts to route traffic to its destination via the tunnel, causing it to collapse. The router then recalculates the routes, re-establishes the tunnel, and the cycle repeats. This is indicated by the system log message “%TUN-5-RECURDOWN Interface Tunnel 0 temporarily disabled due to recursive routing.” References := Study CCNP: GRE Tunnels and Recursive Routing Problems

An AP can discover a wireless LAN controller (WLC) using several methods. Broadcasting on the local subnet allows the AP to send a discovery request to all devices within its local network segment. DHCP Option 43 is used to provide the IP address of the WLC to the AP via the DHCP server. Both methods are commonly used for AP discovery. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) training materials1.

The script is missing an event to trigger the EEM applet. In Cisco EEM (Embedded Event Manager), an event is a specific occurrence on a network device that is detected by EEM. The “event none” statement is used in EEM scripts when the applet is not triggered by any system events but can be manually run. In this case, since the script aims to apply an access list, it doesn’t need to be triggered automatically by any system events but can be invoked as required.

References: Implementing and Operating Cisco Service Provider Network Core Technologies source documents or study guide