Convergence and Reconvergence JN0-352 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the purpose of a Topology Change Notification (TCN) BPDU in classic STP?

   • ATo block a port that is causing a loop
   • BTo elect a new root bridge
   • CTo inform the root bridge that a topology change has occurred
   • DTo request a new spanning tree calculation
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Which event will trigger spanning tree reconvergence?

   • AA MAC address table entry aging out
   • BA link failure on a switch port
   • CA switch receiving a unicast frame for an unknown destination
   • DA new host connecting to an edge port
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   In classic Spanning Tree Protocol (STP), which sequence of port states occurs during convergence after a port transitions from blocking?

   • ABlocking, forwarding, learning
   • BListening, learning, forwarding
   • CForwarding, listening, learning
   • DLearning, listening, forwarding
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A network engineer is deploying a new access switch that connects to two distribution switches in a redundant triangle topology. The access switch has 24 ports connecting to end-user workstations and two uplinks to the distribution layer. The engineer wants the end-user ports to transition to the forwarding state immediately when a workstation is plugged in, while keeping the uplinks protected against loops. Which configuration should the engineer apply on the access switch?

   • AConfigure all 24 access ports as edge ports and leave the two uplinks as normal spanning-tree ports.
   • BDisable spanning tree entirely on the access switch and rely on the distribution switches for loop prevention.
   • CConfigure the two uplinks as edge ports and leave the 24 access ports as normal spanning-tree ports.
   • DConfigure all 26 ports as edge ports to ensure the fastest possible convergence for both access and uplink traffic.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A network administrator is troubleshooting a spanning tree issue in a legacy network that runs classic STP (802.1D). A new switch is connected to the network, and the administrator notices that it takes approximately 50 seconds for the new switch's ports to start forwarding traffic. The administrator wants to reduce this delay. What is the most effective way to speed up convergence in this legacy STP network?

   • AConfigure all ports on the new switch as edge ports to bypass the listening and learning states.
   • BIncrease the max age timer from 20 seconds to 30 seconds on all switches.
   • CEnable RSTP on the new switch only, keeping the rest of the network on classic STP.
   • DReduce the forward delay timer from 15 seconds to 10 seconds on all switches.
   Reveal Solution Discussion Select an answer first