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Nokia Virtual Private LAN Services Questions and Answers

Question 1

Click on the exhibit below.

Based on the service-mtu of this B-VPLS, what is the maximum service-mtu of any connecting I-VPLS attached to this B-VPLS?

Options:

A.

9100 bytes

B.

9104 bytes

C.

9108 bytes

D.

9118 bytes

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Question 2

Which of the following are required for an operational mesh-sdp binding for bidirectional traffic when signaling is enabled within the SDP? (Choose 3)

Options:

A.

LDP must be enabled.

B.

RSVP must be enabled.

C.

An SDP must be configured on the far-end.

D.

Service MTU must match.

E.

SDP ID must match.

Question 3

Which of the following is a true statement?

Options:

A.

The lower the age-time, the greater the amount of flooding

B.

The higher the age-time, the greater the amount of flooding.

C.

The lower the age-time, the lower the amount of flooding.

D.

There is no relationship between the age-time and the amount of flooding.

Question 4

Which of the following needs to be considered when designing Ethernet networks with redundancy?

Options:

A.

Processing the TTL takes extra time.

B.

MAC learning rate is doubled.

C.

FDB size is doubled.

D.

Requires a protocol to remove loops.

Question 5

Which of the following must be true in order to add a port to a LAG? (Choose 2)

Options:

A.

ports must be on the same MDA

B.

ports must have the same speed and duplex settings

C.

auto negotiation must be on

D.

auto negotiation must be off or limited

E.

port must be in access mode only

Question 6

What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?

Options:

A.

The frame will be flooded.

B.

The frame will be discarded.

C.

The frame will be fragmented.

Question 7

What is PBB also known as?

Options:

A.

H-VPLS

B.

IEEE 802.lag

C.

MAC aggregation

D.

MAC-in-MAC

Question 8

An MC-LAG is configured with default parameters. When a failed interface recovers, the active link reverts to the restored interface.

Options:

A.

TRUE

B.

FALSE

Question 9

Click on the exhibit below.

Study the diagram shown. What consideration should be given to the transport tunnel of SDP 300?

Options:

A.

The SDP must be configured to use GRE encapsulation.

B.

The SDP must follow the same path as the user's SDP.

C.

The SDP should be configured to use an RSVP signaled transport with fast reroute.

D.

The SDP must be the same as the user's SDP.

Question 10

What are the advantages of running a physical ring topology with a mesh of mesh-SDPs? (Choose 2)

Options:

A.

STP can be used to break the loop.

B.

STP is not required to break the loop because of split-horizon rules.

C.

If the traffic is primarily multicast, a full mesh of SDPs is a simple and efficient design.

D.

If the traffic is primarily Unicast, a full mesh of SDPs is a simple and efficient design.

Question 11

Which PDU type is sent periodically over a link in the IEEE 802.3ah EFM as a method of keepalive?

Options:

A.

Event notification.

B.

Loopback control.

C.

Information.

D.

Variable request.

E.

Variable response.

Question 12

Click on the exhibit below.

Assume the port on CE-A is sending two tags, a top tag of 100 and a bottom tag of 500. PE-A is configured with a SAP id of 1/1/1:100.*. How should PE-B be configured if CE-B is expecting a top tag of 200 and a bottom tag of 500?

Options:

A.

PE-B will require a SAP id of "sap 1/1/1:500*".

B.

PE-B will require a SAP id of "sap 1/1/1:100*".

C.

PE-B will require a SAP id of "sap 1/1/1:500.200".

D.

PE-B will require a SAP id of "sap 1/1/1:200*".

Question 13

In Rapid Spanning Tree Protocol, a Backup Port is on the same switch as a Designated Port?

Options:

A.

TRUE

B.

FALSE

Question 14

Click on the exhibit below.

How many LSPs are required in total between Metro A and Metro B if 100 hierarchical VPLS services are deployed across the two metro networks?

Options:

A.

100

B.

200

C.

1

D.

2

Question 15

If the command "disable-learning" has been added at the VPLS level, then MAC entries which have already been learned will not be aged.

Options:

A.

TRUE

B.

FALSE

Question 16

Which of the following statements about Spanning Tree Protocol is true?

Options:

A.

For the switches that are non-root or designated switches, the port with the highest combined cost to the root is the root port.

B.

In the case where two switches have the same priority, the switch with the lowest MAC address becomes the root.

C.

The switch port that is the greatest distance from the LAN to the root is the designated port.

D.

All of the above.

Question 17

Which physical topology is NOT commonly deployed in today's VPLS networks?

Options:

A.

Ring topologies.

B.

Metro-to-metro topologies

C.

H-VPLS topologies.

D.

Partial-mesh topologies.

Question 18

H-VPLS solves the data-plane and control-plane problems with the exception of one issue. What is the concern that H-VPLS does not solve?

Options:

A.

Increased LSP count.

B.

Number of TLDP sessions.

C.

The amount of network touches.

D.

FDB consumption.

E.

Increased bandwidth and replication.

Question 19

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.

Question 20

Which service component in the data plane uniquely identifies a VPLS to the far end PE node?

Options:

A.

SDP id

B.

Service ID

C.

VC Label

D.

Tunnel Label

E.

Customer id

Question 21

Which of the following OAM tools can be used as a VPLS topology discovery mechanism (Choose 2)?

Options:

A.

oam mac-ping

B.

oam mac-populate

C.

oamsvc-ping

D.

oam mac-trace

Question 22

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)

Options:

A.

An additional management VPLS.

B.

Another set of LSPs between PE1 and PE3 and between PE2 and PE4.

C.

Another set of SDPs between PE1 and PE3 and between PE2 and PE4.

D.

Load balancing has to be enabled within the management VPLS.

Question 23

Click on the exhibit below.

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.

Exam Detail
Vendor: Nokia
Certification: SRC Certification
Exam Code: 4A0-105
Exam Name: Nokia Virtual Private LAN Services
Last Update: Dec 25, 2024
4A0-105 Question Answers
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Total 156 questions
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