4A0-105 무료 덤프문제 온라인 액세스

What needs to be configured in a VPLS in order to forward customer STP BPDUs transparently?

• A.Spanning tree BPDUs must be untagged.
• B.Spanning tree must be enabled within the VPLS.
• C.Spanning tree must be disabled within the VPLS.
• D.Spanning tree BPDUs must be tagged.

In IEEE 802.1ag,which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)

• A.MIP
• B.MEP
• C.MAP
• D.MUP

In Active/Standby pseudowires a failed pseudowire has recovered. Under what circumstances will the active pseudowire revert to the previously failed link?

• A.It will never revert to the previously failed link.
• B.It will always revert to the previously failed link.
• C.It will revert if the precedence of the previously failed link is lower than the currently active link
• D.It will revert if the precedence of the previously failed link is set to 0 or "primary".

When a PE node receives a PBB encapsulated frame on a B-VPLS, how does the PE determine which l-VPLS it belongs to?

• A.When the B-MAC header is stripped the customer MAC address is then looked up in the FDB
• B.The l-SID in the l-TAG is inspected to determine where the frame should be delivered.
• C.The l-TAG in the l-SID is inspected to determine where the frame should be delivered.
• D.The PE inspects the service label in the MPLS header before stripping the B-MAC
  header.

Which of the following describes the setting of the l-SID on the Alcatel-Lucent 7750 SR?

• A.There is no default value. The I-SID must always be explicitly configured
• B.TheI-SID is always set to the service-id by default.
• C.TheI-SID is set to 0 by default and is only used for interop purposes. The receiving PE uses the service label to determine the I-VPLS.
• D.The I-SID is set to the service-id, unless the service-id is larger than a 24 bit value. In this case the I-SID must be explicitly configured.