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Free Nokia 4A0-105 Practice Exam with Questions & Answers | Set: 3

Questions 21

Why should you configure send-flush-on failure on your PE routers when using active/standby pseudowires?

Options:
A.

It flushes the local FDB speeding recovery

B.

It discards all packets in the queue and sends icmp-discad messages to the sender. The packets are re-transmitted resulting in no loss of data.

C.

On failure, the PE sends an LDP flush-all-from-me message to all PE devices in the VPLS. This speeds convergence to the new topology.

D.

It is not important to use send-flush-on-failure as Active/Standby signalling automatically converges the FDB in all VPLS instances

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Questions 22

Five VPLS services have been configured between two PE routers. What is the minimum amount of SDPs that must be configured?

Options:
A.

5-one for each service.

B.

2-one in each direction.

C.

10-five in each direction.

D.

None of the above.

Questions 23

You are providing a customer two VPLS services in two different Metro networks. VPLS 500 has been configured in Metro 1 and VPLS 900 has been configured in Metro 2. The customer has requested that they have connectivity between the Metro Networks with their existing VPLS services. Which configuration on the PE routers linking the metro networks will allow for VPLS 500 and VPLS 900 to act as a single VPLS service? Assume default values for all VPLS parameters and SDP 999 exists between the metro networks.

4A0-105 Question 23

Options:
A.

Option A

B.

Option B

C.

Option C

D.

Option D

Questions 24

RSTP blocks a spoke-sdp using a management VPLS. Is traffic affected on an ES using the same transport SDP?

Options:
A.

Yes

B.

No

Questions 25

Which of the following describes the overhead added to a customer frame on an Ethernet link in a VPLS service on the Nokia 7750 SR?

Options:
A.

The overhead consists of 26 bytes. 14 DLC + 2 Ethertype + 8 for mpls labels + 2 for GRE

B.

The overhead consists of 14 bytes for DLC.

C.

The overhead consists of 18 bytes. 14 DLC +4 for mpls labels

D.

The overhead consists of 22 bytes. 14 DLC + 8 for mpls labels

Questions 26

Click on the exhibit below.

4A0-105 Question 26

If the device connected to PE-A in Metro A sends a frame to PE-A that requires replication within the VPLS which devices is PE-A responsible for replicating the frame to?

Options:
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

Questions 27

Click on the exhibit below.

4A0-105 Question 27

Given the following output what is the most likely reason the SDP binding is operationally down? (Choose 2)

Options:
A.

The sdp id is different on the far-end.

B.

LDP is disabled on the far-end.

C.

The vc-id is different on the far-end.

D.

The mesh-sdp is missing on the far-end.

E.

The mesh-sdp is administratively shutdown on PEL

F.

There is an MTU mismatch.

Questions 28

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

Options:
A.

Spanning tree must be enabled within the VPLS.

B.

Spanning tree BPDUs must be untagged.

C.

Spanning tree BPDUs must be tagged.

D.

Spanning tree must be disabled within the VPLS.

Questions 29

Which of the following is a true statement?

Options:
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.

Questions 30

How is MAC learning achieved in traditional Ethernet switches?

Options:
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.

Exam Code: 4A0-105
Certification Provider: Nokia
Exam Name: Nokia Virtual Private LAN Services
Last Update: Mar 28, 2025
Questions: 156

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