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2021 Aug 4A0-105 test preparation
Q11. Which SDP on R3 will MAC addresses be associated with for devices behind R2?
B. The devices cannot communicate based on the configuration in the diagram so there will be nomac address association
C. Devices behind R2 will be associated with thesdp between R3 and R1
D. Devices behind R2 will be associated with thesdp between R3 and R4
Answer: C
Q12. What is the main difference between Multiple Spanning-Tree Instances (MSTIs) and Common Internal Spanning Tree (CIST)?
A. MSTIs are extended outside of the region. CIST has no interaction outside of the region
B. A different BPDU is used for MSTI and CIST
C. CIST is extended outside of the region. MSTIs have no interaction outside of the region
D. CIST can only be mapped to VLAN 0 and MSTI can be mapped to VLAN 1-4094
Answer: C
Q13. If the device connected to PE-A sends a frame to PE-A that requires replication within the VPLS which devises is PE-A responsible for replicating the frame to?
A. PE-A must replicate the frame to all devices participating in the VPLS
B. PE-A must replicate the frame to all PEs within Metro A
C. PE-A must replicate the frame to all devices in the Metro A
D. All of the above
Answer: B
Q14. By default, what MAC address is used by an IES interface bound to a spoke-sdp?
A. The chassis base MAC address
B. The MAC address of the network port the SDP egresses on
C. There is no default MAC address for an IES service bound to a spoke-sdp. It must be configured
D. The MAC address is derived from the IP address assigned to IES interface
Answer: A
Q15. The FIB has learned 2 MAC addresses. The first from a device accessible via a locally defined SAP, the second from a device accessible via locally defined SDP. Both MAC addresses were learned at the exact same time. Assuming these MAC addresses were only heard from once, which will time out first based on default settings?
A. MAC learned via SAP
B. MAC learned via SDP
C. There is not enough information to determine
D. Both will timeout at the same time
Answer: A
Improved 4A0-105 rapidshare:
Q16. Management VPLS 100 has been created for redundant spoke-SDP connections. User VPLSs 10 and 20 are using the same spoke-SDPs that are being managed by VPLS 100. Unexpected behavior has been reported. Based on the following output, what is the most likely reason for the
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unexpected behavior?
A. VPLS 100 was not actually configured as a management VPLS
B. VPLS 10 and VPLS 20 was not actually configured as a user VPLS
C. VPLS 10 and VPLS 20 are not using the same spoke-sdps that the management VPLS is using
D. Based on the output there is now way of telling if there is a problem with the configuration
Answer: A
Q17. Some of the drawbacks of Ethernet Layer 2 redundancy is (choose all that apply):
B. False
Answer: B
Q18. Which of the following functions must a PE router support when participating in a VPLS network? Choose all that apply.
A. MAC learning
B. Packet replication
C. Proxy ARP D. Packet forwarding
E. Flood all frames with an unknown destination MAC address to all PE routers associated with that VPLS
Answer: A,B,D,E
Q19. Assume the interface on CE-A is null and the SAP on PE-A is dot1q. Which of the following statements is true?
A. The SAP on PE-B must be configured with dot1q encapsulation
B. The SAP id on PE-A can be sap1/1/1:0 or ap 1/1/1:*
C. If CE-B is expecting untagged frames the SAP on PE-B cannot be configured with dot1q encapsulation
D. If CE-B sends tagged frames and PE-B transparently passes the tagged frames communication between CE-B and CE-A will be successful
Answer: B
Q20. A customer has requested a VPLS service. The customer is using dot1q encapsulation and they have requested that the vlan tags be transparently passed. Which two SAP IDs will accept VLAN tags and pass them transparently? (Choose two correct answers)
A. sap1/1/1
B. sap 1/1/1:0.*
C. sap1/1/1:0
D. sap1/1/1:*
Answer: A,D