Module 4 – Exam 1. What happens when a switch running 802.1D receives an RSP BPDU? The switch responds with an agreement The BPDU is dropped 802.1D and 802.1w are incompatible; the switch will generate an error message The switch responds with a proposal Question 1 of 21 2. Which statements are FALSE in regards to the RSTP BPDU? The BPDU Type fields are now set to a value of 2, instead of the value 0 The Message Age NOT Maximum Age is used to age out information Only two Flags are defined in the IEEE 802.1w standard BPDU Type fields are now set to a value of 0, instead of the value 2 With the 802.1w standard, switches now send a BPDU only if they receive BPDUs from the Root Bridge BPDU are sent every Hello Time (which is 2 seconds by default) Question 2 of 21 3. What happens when an RSTP edge port receives a BPDU? The switch generates a TCN BPDU It is placed into an err-disabled state The port is placed into a blocking state It becomes a normal STP port Edge ports have PortFast enabled and cannot receive BPDUs Question 3 of 21 4. Which of the following statements are TRUE in regards to MST Regions? An MST Region defines a boundary within which multiple instances of Spanning Tree operate An MST Region defines a boundary within which a single instance of Spanning Tree operates An MST Region consists of a two different components, which are edge ports and boundary ports An MST Region consists of a two different components, which are edge ports and shared ports An MST Region consists of a two different components, which are trunk ports and boundary ports Question 4 of 21 5. Click on the Exhibit. Which of the following statements are TRUE in regards to this configuration? All other VLANs not explicity mapped to a particular instance will be disabled All other VLANs not explicity mapped to an MSTI will default to Instance 0 VLAN 100 and VLAN 110 will be mapped to MST Instance 6 VLAN 11 will be mapped to MST00 VLAN 40 will be mapped to MST Instance 2 Question 5 of 21 6. Which of the following statements are FALSE in regards to MSTP and RSTP? RSTP is automatically enabled when MSTP is enabled MSTP and RSTP have completely different BPDU formats Each switch does not need to be capable of processing RSTP BPDUs in order to support MST Each switch must be capable of processing RSTP BPDUs in order to support MST RSTP must be manually enabled when MSTP is enabled MSTP and RSTP share a similar BPDU format Question 6 of 21 7. When running RSTP, what happens when a port connected to another switch does not receive a BPDU in 6 seconds? The switch generates a TCN BPDU The switch sends out a Configuration BPDU of its own The port information is invalidated (aged out) The Max Age timer begins to decrement and the information is aged out when this timer goes to 0 Question 7 of 21 8. What Spanning Tree enhancements are included in RSTP? PortFast Root Guard Loop Guard Backbone Fast Uplink Fast BPDU Guard BPDU Filter Question 8 of 21 9. Which of the following runs a single instance of STP for each individual VLAN? MSTP RSTP CST PVST+ Question 9 of 21 10. When does a switch running RSTP set the proposal bit in a BPDU? When an edge port is in a discarding or learning state When a designated port is in a discarding or learning state When a root port is in a discarding or learning state When an alternate port is in a discarding or learning state When a backup port is in a discarding or learning state Question 10 of 21 11. MST configuration must be same on all switches in the same MST region. This includes the following three user-configured parameters? Region Name VLAN Instance Mapping Catalyst Switch Platform Type The Enable Secret Cisco IOS Software Version Revision Number Question 11 of 21 12. Which of the following statements are TRUE in regards to MSTP Instances? MSTIs are the only Instances that sends and receives BPDUs. All other Spanning Tree Instance information is contained in M-records The MST Region sees the outside world via MSTI interaction MST Instance 0 is mandatory and is always present The MST Region sees the outside world via IST interaction Cisco Catalyst switches support up to 15 MSTIs on a single switch The IST is the only Instance that sends and receives BPDUs. All other Spanning Tree Instance information is contained in M-records Cisco Catalyst switches support up to 16 MSTIs on a single switch MST Instance 1 is mandatory and is always present Question 12 of 21 13. Which of the following statements is TRUE in regards to RSTP topology changes? A topology change is initiated only when any port transitions to the Forwarding state When a switch running RSTP detects a topology change, it immediately sends BPDUs out of all edge ports with the TC bit set and begins the TC While timer A topology change is initiated only when a non-edge port transitions to the Forwarding state A topology change is initiated only when an edge port transitions to the Forwarding state Question 13 of 21 14. Which of the following is TRUE in regards to the configuration of MSTP? When MSTP is enabled, all switches use PVST+ by default Once configured on the VTP server, the configuration is propagated to all other switches When MSTP is enabled, all switches use 802.1Q (CST) by default Once configured on the Root Bridge, the configuration is propagated to all other switches All switches must be manually configured when implementing MSTP Question 14 of 21 15. What port states are used in RSTP Discarding Listening Blocking Learning Forwarding Question 15 of 21 16. Click on the Exhibit. RSTP is enabled on the switch. What can be determined from this output? The port is a trunk port The port is operating in Half-Duplex Mode The port is operating in Full-Duplex mode The port is connected to another switch running RSTP Question 16 of 21 17. Which of the following configuration commands is required to begin the configuration of MSTP on the switch? Switch-2(config-vlan)#spanning-tree mst configuration Switch-2(config-vlan)#spanning-tree mstp configuration Switch-2(config)#spanning-tree mstp configuration Switch-2(config)#spanning-tree mst configuration Switch-2(config-mst)#spanning-tree mst configuration Switch-2(config)#spanning-tree configuration mst Question 17 of 21 18. Which of the following runs a single Spanning Tree instance for all VLANs configured on the switch? RSTP PVST+ MSTP CST Question 18 of 21 19. Which of the following statements about MSTP Regions are FALSE? The MST Region name is NOT case-sensitive The MST Region name is case-sensitive There can only be up to 32 Regions in the network Switches can belong to multiple Regions Switches can belong to only a single Region There is no limit to the number of Regions that can exist Question 19 of 21 20. What MSTP mechanism is used to determine when to trigger a reconfiguration? The Hop Count The M-Record The Message Age The Maximum (Max) Age The IP TTL Question 20 of 21 21. During RSTP Synchronization, what happens when the RTSP-enabled switch receives an 802.1D BPDU? The switch continues sending BPDUs with the proposal flag set until the Forward Delay timer expires The switch immediately replies with its own information in a proposal RSTP sets the port to the Blocking state The switch defaults back to traditional STP operation and starts the Forward Delay timer for the port The switch does sets the proposal flag Question 21 of 21 Loading…
