JUNOS Enterprise Switching

Chapter Review Questions

1. What is the primary purpose of Spanning Tree Protocol?

   1. Load-balance across multiple links

   2. Eliminate loops

   3. Learn neighbor switch information

   4. Create optimized paths throughout the LAN

2. Which bridge is the primary forwarder on a given link?

   1. Designated

   2. Primary

   3. Active

   4. Forwarder

3. By default, how is the root bridge chosen?

   1. Based on the number of total ports

   2. Port identifier

   3. Total port cost

   4. Bridge ID

4. Which two port states are valid STP states:

   1. Blocking

   2. Waiting

   3. Listening

   4. Establishing

5. Which command is issued to view the STP port states on an EX Series switch?

   1. show stp

   2. show stp bridge

   3. show stp interface

   4. show stp ports

6. True or false: STP provides subsecond failover time.

   1. True

   2. False

   3. There are no absolutes in the universe!

7. Which two new port types are introduced in RSTP?

   1. Backup

   2. Root

   3. Blocking

   4. Alternate

   5. Fast

8. Choose two items that RSTP changes from the original STP specification:

   1. More root bridges

   2. Fewer port states

   3. Different link costs

   4. Faster tree algorithm

9. Which command protects the switch from receiving superior BPDUs?

   1. Bpdu-block

   2. inferior

   3. no-root-port

   4. edge port

10. How many regions are allowed when configuring MSTP?

    1. 3

    2. 32

    3. 64

    4. 100

    5. 128

11. What is the maximum number of root bridges that can be configured in MSTP?

    1. 1

    2. 64

    3. 65

    4. 100

12. Which command allows a primary link to revert back after a failover in RTG?

    1. primary

    2. active

    3. revert

    4. master