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Total 193 questions
What is the DA address used for in the Ethernet Header?
- A. MAC learning
- B. SA filtering
- C. Routing table population
- D. Frame forwarding
Answer : D
How is MAC learning achieved in traditional Ethernet switches?
- A. As frames leave the switch, the DA is populated into the FDB.
- B. As frames enter the switch, the DA is populated into the FDB.
- C. As frames leave the switch, the SA is populated into the FDB.
- D. As frames enter the switch, the SA is populated into the FDB.
Answer : D
What is the maximum number of VLANs supported on a traditional Layer 2 switch?
- A. 4094
- B. 8190
- C. 32768
- D. 131071
Answer : A
How is it possible for multiple services to be carried over the same MPLS LSPs?
- A. Multiple SDPs must be configured and bound to the LSPs for this to be possible.
- B. It is not possible to carry multiple services over the same MPLS LSPs.
- C. A vc-label is signaled per service.
- D. The vc-id is part of the data plane and maps the traffic to the appropriate service.
Answer : A
Click on the exhibit below.
Based on the following output what will the vc-id be of any mesh-sdp bound to this service?
- A. 9000
- B. 1514
- C. 1000
- D. 100
Answer : C
Which of the following functions must a PE router support when participating in a VPLS service? (Choose 3)
- A. MAC learning
- B. Frame replication
- C. Frame fragmentation
- D. Frame forwarding
- E. Must discard frames with an unknown destination MAC
- F. MSTP
Answer : ABD
Five VPLS services have been configured between two PE routers. What is the minimum amount of SDPs that must be configured?
- A. 5-one for each service.
- B. 2-one in each direction.
- C. 10-five in each direction.
- D. None of the above.
Answer : B
Multiple VPLS services can be offered over the same set of LSP tunnels?
- A. TRUE
- B. FALSE
Answer : A
Which service component in the data plane uniquely identifies a VPLS to the far end PE node?
- A. SDP id
- B. Service ID
- C. VC Label
- D. Tunnel Label
- E. Customer id
Answer : C
Click on the exhibit below.
The service MTU on PE-A is 1514 bytes and the service MTU on PE-C is 1518 bytes. What is the status of the mesh-sdp between PE-A and PE-C?
- A. The mesh-sdp will be up.
- B. The mesh-sdp will be down.
- C. The mesh-sdp will only be up on PE-A.
- D. The mesh-sdp will only be up on PE-C.
Answer : B
To reduce the amount of flooding between PE devices which of the following steps should be taken?
- A. Configure the local age timer to be larger.
- B. Configure the local age timer to be lower.
- C. Configure the remote age timer to be larger.
- D. Configure the remote age to be lower.
Answer : C
Which of the following is a true statement?
- A. In a dynamic environment where MAC addresses are changing rapidly, the lower the age-time, the larger the fdb-table-size should be.
- B. In a dynamic environment where MAC addresses are changing rapidly, the higher the age-time, the larger the fdb-table-size should be.
- C. In a dynamic environment where MAC addresses are changing rapidly, the higher the age-time, the smaller the fdb-table-size should be.
- D. There is no relationship between the age-time and the fdb-table-size.
Answer : B
Which of the following OAM tools can be used as a VPLS topology discovery mechanism (Choose 2)?
- A. oam mac-ping
- B. oam mac-populate
- C. oamsvc-ping
- D. oam mac-trace
Answer : AD
Click on the exhibit below.
In the following diagram, traffic ingressing on SAP 1/2/3:1 will be passed to the layer-2 DPI device for inspection based on a filter policy applied to the ingress of the SAP. What feature should be enabled on SAP 1/2/1:100 and SAP 1/2/2:100 to ensure that incorrect information is not populated in the FDB of VPLS 1?
- A. Learning should be disabled on both SAPs connected to the DPI device to prevent FDB instability
- B. A MAC filter should be applied to both SAPs connected to the DPI to limit MAC learning on the port
- C. An IP filter should be applied to both SAPs connected to the DPI to prevent FDB instability
- D. The SAPs connected to the DPI should be configured with the "discard-unknown" feature to limit MAC learning on the port
Answer : A
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