Configure, Monitor, or Troubleshoot Layer 2 Protection and Port Security JN0-352 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network administrator is troubleshooting a spanning-tree loop that occurs intermittently. The loop happens when a link between two switches goes down and comes back up, causing BPDUs to stop being received on a redundant path. The administrator wants to prevent the alternate port from transitioning to forwarding when BPDUs are lost. Which feature should be enabled on the appropriate interfaces?

   • AEnable BPDU protection on the alternate and root ports to shut them down if BPDUs are not received.
   • BEnable root protection on the alternate and root ports to prevent them from becoming designated.
   • CConfigure the ports as edge ports to skip the listening and learning states and forward immediately.
   • DEnable loop protection on the alternate and root ports so they transition to a loop-inconsistent state when BPDUs stop.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   What is the purpose of loop protection on an interface?

   • ATo error-disable the port when any BPDU is received
   • BTo prevent alternate or root ports from transitioning to forwarding when BPDUs stop
   • CTo limit the number of MAC addresses learned on the port
   • DTo prevent the port from becoming a root port
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   Which Junos operational command shows whether an interface is error-disabled due to BPDU protection?

   • Ashow interfaces ge-0/0/1 extensive
   • Bshow ethernet-switching interface ge-0/0/1
   • Cshow spanning-tree interface ge-0/0/1
   • Dshow log messages | match BPDU
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A network administrator is monitoring port security on a switch. The administrator wants to see a summary of all interfaces that have port security enabled, including the number of violations on each interface. Which command should the administrator use?

   • Ashow port-security
   • Bshow ethernet-switching table
   • Cshow interfaces terse
   • Dshow configuration interfaces
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the primary purpose of port security on a switch interface?

   • ATo filter traffic based on IP addresses
   • BTo encrypt all traffic traversing the interface
   • CTo prevent unauthorized devices from connecting by restricting MAC addresses
   • DTo prioritize traffic based on VLAN tags
   Reveal Solution Discussion Select an answer first