CCNP Switch FAQ : Implementing Spanning Tree
Q1. True or False: MST is always preferred if you have more than a single VLAN.
Q2. True or False: Secondary root bridges have a lower bridge priority than primary root bridges.
Q3. Which one of the following is the best bridge priority configuration for a spanning-tree root switch?
a. 0
b. 1
c. 4096
d. 8192
e. 65536
Q4. What command is used to configure a distribution switch as the primary root of a spanning tree?
a. spanning-tree vlan vlan-id primary
b. spanning-tree vlan vlan-id root primary
c. spanning-tree root primary
d. spanning-tree bridge root
e. None of the above
Q5. How many operational states does RSTP have?
a. 1
b. 2
c. 3
d. 4
e. None of the above
Q6. What is a typical convergence time in network topology of just two directly connected RSTPenabled switches?
a. 15 seconds
b. 50 seconds
www.CareerCert.info
c. 20 seconds
d. 2 seconds
e. <1 second
Q7. What is the default message interval for BPDUs in RSTP mode?
a. 1 second
b. 15 seconds
c. 20 seconds
d. 2 seconds
e. <1 second
Q8. True or False: Enabling PortFast is recommended on all ports to improve STP convergence.
9. Upon which one of the following features does the BPDU Guard depend?
a. PortFast
b. BPDU filtering
c. UplinkFast
d. Root Guard
Q10. How does the Root Guard feature recover from the root-inconsistent state?
a. Automatically when the port stops receiving superior BPDUs
b. Automatically when the port stops receiving inferior BPDUs
c. Using an err-disable timeout mechanism
d. Manual shutdown/no shutdown of the port
e. Reload of the switch
Q11. BPDU filtering should be enabled only on ports connected to which of the following devices?
a. Hosts
b. Routers
c. Switches
d. Hubs
Q12. Select an activity that is not a recommended step in troubleshooting STP issues and Layer 2 loops.
a. Identifying the loop
b. Restoring connectivity
c. Rebooting the root switch or secondary root switch
d. Checking for bad hardware
e. Checking for port errors
Q13. Which command is used to collect debugging data regarding STP events on Catalyst switches?
a. logging spanning-tree events
b. logging events spanning-tree
c. debug stp events
d. debug spanning-tree events
e. None of the above