Alcatel-Lucent 4A0-105 問題集

質問 1：
The operation of a VPLS can be best described by which of the following statements?
A. A frame should be flooded as little as possible.
B. Only (a) and (b) are true.
C. Customer frames should be switched based on the destination MAC address.
D. All of the above.
E. A frame should be sent to the PE that connects to the target site whenever possible.
正解：D

質問 2：
Port 1/1/1 has been configured as an access port with QinQ encapsulation. Which of the following three statements are true for ingress traffic assuming default configuration? (Choose 3)
A. sap 1/1/1:*.0 is a valid sap id.
B. sap 1/1/1:200* will strip the top tag of 200 and the bottom tag will be transparently passed.
C. sap 1/1/1:0* will accept any tagged frames.
D. sap 1/1/1:100* will accept frames with a single tag of 100.
E. sap 1/1/1:0* will accept all untagged frames.
正解：B,D,E

質問 3：
In IEEE 802.1ag,which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)
A. MUP
B. MAP
C. MEP
D. MIP
正解：C,D

質問 4：
After the "disable-learning" command has been executed at the VPLS level, a new client device originates a frame. What is the result?
A. The new source MAC addresses will not be entered in the VPLS service forwarding database.
B. New local source MAC addresses will not be entered in the VPLS service forwarding database, but new remote MAC addresses would continue to be entered.
C. New remote source MAC addresses will not be entered in the VPLS services forwarding database, but new local MAC addresses would continue to be entered.
D. If the MAC address of this new client device does not reach the upper limit of the configured total number of MAC addresses allowed in the VPLS forwarding database, then the new MAC address will be stored.
正解：A

質問 5：
Which physical topology is NOT commonly deployed in today's VPLS networks?
A. Ring topologies.
B. Partial-mesh topologies.
C. Metro-to-metro topologies
D. H-VPLS topologies.
正解：B

質問 6：
Click on the exhibit below.

CE-A is on VLAN 200 and CE-B is on VLAN 300. Which of the following SAP ids can be configured on PE-A and PE-B to allow direct communication between CE-A and CE-B?
A. PE-A will require a SAP id of "sap 1/1/1:200" and PE-B will require a SAP id of "sap 1/1/1:300.
B. PE-A will require a SAP id of "sap 1/1/1:0" and PE-B will require a SAP id of "sap 1/1/1:0".
C. PE-A will require a SAP id of "sap 1/1/1" and PE-B will require a SAP id of "sap 1/1/1".
D. PE-A will require a SAP id of "sap 1/1/1:*" and PE-B will require a SAP id of "sap 1/1/1:*".
正解：A

質問 7：
During the process of troubleshooting a VPLS problem the "oam mac-purge" command with "register" option was used to purge a MAC address from the FDB. Which of the following statements is true?
A. RelearningoftheMAC address that was purged can only be done once customer traffic resumes.
B. Relearningofthe MAC address that was purged can only be done with the "oam macpopulate" command.
C. Relearning of the MAC address that was purged can only be done with the "oam mac-
register" command.
D. Customer traffic destined to the MAC address that was purged will be dropped until the MAC address is relearned with the "oam mac-populate" command.
正解：B

質問 8：
To reduce the amount of flooding between PE devices which of the following steps shouldbetaken?
A. Configure the remote age to be lower.
B. Configure the remote age timer to be larger.
C. Configure the local age timer to be larger.
D. Configure the local age timer to be lower.
正解：B

質問 9：
Which of the following features can be enabled to eliminate MAC instability when using policy-based forwarding to redirect traffic to a Layer 2 DPI device?
A. mac-move
B. disable-learning
C. enable-mac-stability
D. discard-unknown
正解：B