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Free 4A0-105 Exam Braindumps
4A0-105 Virtual Private LAN Services Questions 81–85 (page: 18)

Updated On: 9-Feb-2026
Page 18 of 40
PDF with 193 Questions

In RSTP, which state do all ports initialize in?

  1. Designated
  2. Discarding
  3. Listening
  4. Root
  5. Forwarding

Answer(s): B



Click on the exhibit below.


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 unexpected behavior?

  1. VPLS 100 was not actually configured as a management VPLS.
  2. VPLS 10 and VPLS 20 are not actually configured as a user VPLS.
  3. VPLS 10 and VPLS 20 are not using the same spoke-sdps that the management VPLS is using.
  4. Based on the output there is now way of telling if there is a problem with the configuration.

Answer(s): A



Click on the exhibit below.


You have been requested to add load balancing across the redundant spoke-SDPs in the network shown. What further configuration is required? (Choose 2)

  1. An additional management VPLS.
  2. Another set of LSPs between PE1 and PE3 and between PE2 and PE4.
  3. Another set of SDPs between PE1 and PE3 and between PE2 and PE4.
  4. Load balancing has to be enabled within the management VPLS.

Answer(s): A,C



The command "send flush-on-failure" has been enabled within a VPLS instance. What does the PE do upon detection of a SAP failure within the VPLS?

  1. The PE sends an LDP control message that flushes all FDB entries in the VPLS instance.
  2. The PE sends an LDP control message that flushes all FDB entries in the VPLS instance that are associated with the PE that detected the failure.
  3. The PE flushes it's local FDB only.
  4. The PE sends an oam service message that flushes all FDB entries in the VPLS instance.

Answer(s): B



What configuration is required on the CE device when using MC-LAG?

  1. The CE must be configured with an MC-LAG to both PE devices.
  2. The CE must be configured with LACP in active mode.
  3. There is no configuration required on the CE.
  4. The CE must be an Alcatel-Lucent 7750 SR.

Answer(s): B



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