Convergence and Reconvergence JN0-364 Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A service provider is planning to migrate from STP to RSTP. The network has a mix of access switches and core switches, with redundant links. The provider's main concern is minimizing downtime during the migration. Which migration strategy minimizes downtime?

   • ADisable spanning tree during the migration and re-enable it after all switches are upgraded.
   • BUpgrade the access switches first, then the core switches.
   • CUpgrade all switches to RSTP simultaneously during a maintenance window.
   • DUpgrade the core switches first, then the access switches.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   When a link fails in an RSTP network, which port type can immediately take over the forwarding role without waiting for timers?

   • ADisabled port
   • BEdge port
   • CBackup port
   • DAlternate port
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   In RSTP, which handshake mechanism allows a designated port to transition to the forwarding state without waiting for the forward delay timer?

   • AThe proposal/agreement handshake
   • BThe root port fast-forwarding flag
   • CThe max age timer expiration
   • DThe TCN BPDU propagation
   Reveal Solution Discussion Select an answer first
5. 14expert · hard

   A service provider is evaluating whether to migrate from STP to RSTP in a network with a mix of access and core switches. The network has redundant links, and the provider requires convergence time of less than 2 seconds for link failures. The provider also has some legacy switches that only support STP. What is the best approach to meet the convergence requirement?

   • AMigrate all switches to RSTP and replace the legacy switches that only support STP.
   • BKeep STP on the legacy switches and enable RSTP on the new switches.
   • CDisable spanning tree on the legacy switches and rely on RSTP on the new switches.
   • DUse STP on all switches and reduce the forwarding delay timer to 5 seconds.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A network engineer is comparing the convergence behavior of STP and RSTP in a lab environment. The engineer disconnects the root port on a switch and observes the time it takes for traffic to resume on the alternate path. Which observation would confirm that RSTP is being used?

   • ATraffic resumes only after the max age timer expires (20 seconds).
   • BTraffic resumes after the forwarding delay timer expires (15 seconds).
   • CTraffic resumes after the switch sends a topology change notification to the root bridge.
   • DTraffic resumes within a few milliseconds because the alternate port transitions immediately.
   Reveal Solution Discussion Select an answer first