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Nokia 4A0-105 Nokia Virtual Private LAN Services Exam Practice Test

Demo: 23 questions
Total 156 questions

Nokia Virtual Private LAN Services Questions and Answers

Question 1

The operation of a VPLS can be best described by which of the following statements?

Options:

A.

A frame should be sent to the PE that connects to the target site whenever possible.

B.

A frame should be flooded as little as possible.

C.

Customer frames should be switched based on the destination MAC address.

D.

All of the above.

E.

Only (a) and (b) are true.

Question 2

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?

Options:

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

C.

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".

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:*".

Question 3

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 4

Click on the exhibit below.

Which port will become the alternate port?

Options:

A.

Bridge B 1/1/3

B.

Bridge B 1/1/2

C.

Bridge C 1/1/2

D.

Bridge C 2/1/1

E.

Bridge D 1/1/1

F.

Bridge D 1/1/3

G.

Bridge E 1/1/1

Question 5

What action will be taken when an Ethernet switch receives a frame with a known DA and an outer Ethertype value of 0x0800 on a dot1q encapsulated port?

Options:

A.

The frame will be forwarded out the port associated with the DA.

B.

The frame will be discarded.

C.

The frame will be flooded to all ports.

D.

The frame will be fragmented and forwarded out the port associated with the DA.

Question 6

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

Question 7

What function in IEEE 802.1 ah helps to limit the amount of MAC addresses learned in the core?

Options:

A.

I-VPLS is configured in the core of the network with an l-MAC address. This l-MAC address is the only MAC learned in the core

B.

The B-VPLS and l-VPLS are configured in the edge. The B-VPLS is configured with a Backbone MAC and is the only MAC learned in the core

C.

Each SDP is configured with a Backbone MAC to hide customer MAC addresses in the core

D.

Each SAP is associated with a common l-MAC to hide customer MAC addresses in the core

Question 8

The service mtu of a VPLS is set to 9100. What is the recommended MTU value that can be set for the access port assuming dot1q encapsulation?

Options:

A.

9100

B.

9104

C.

9108

D.

9122

E.

9126

Question 9

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 10

Click on the exhibit below.

Assume a CE router is connected to the SAP of each PE. The arp cache of all CE routers is empty and the FDB for VPLS 300 is empty. The CE router connected to PE-A initiates a ping towards the CE router connected to PE-C. The ping is successful. Which of the following statements are true? (Choose 2)

Options:

A.

The FDB on PE-A will contain entries for all CE routers.

B.

The FDB on PE-B will contain an entry for the CE router connected to PE-A.

C.

The FDB on PE-B will contain an entry for all CE routers.

D.

The FDB on PE-C will contain entries for the CE router connected to PE-A and the CE router connected to PE-C.

Question 11

What is the maximum number of VLANs supported on a traditional Layer 2 switch?

Options:

A.

4094

B.

8190

C.

32768

D.

131071

Question 12

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?

Options:

A.

The PE sends an LDP control message that flushes all FDB entries in the VPLS instance.

B.

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.

C.

The PE flushes it's local FDB only.

D.

The PE sends an oam service message that flushes all FDB entries in the VPLS instance.

Question 13

When deploying Active/Standby pseudowires, the CE does not require any special configuration

Options:

A.

TRUE

B.

FALSE

Question 14

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 15

Which of the following is a function of the data plane that must be considered when provisioning a VPLS service?

Options:

A.

Number of LSPs.

B.

Number of TLDP sessions.

C.

Number of SDPs.

D.

MAC address consumption in the FDB.

E.

Bandwidth and replication requirements.

Question 16

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

Question 17

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

Options:

A.

The l-TAG in the l-SID is inspected to determine where the frame should be delivered.

B.

When the B-MAC header is stripped the customer MAC address is then looked up in the FDB

C.

The l-SID in the l-TAG 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.

Question 18

Why are provisioning requirements a factor that influence VPLS design? (Choose 2)

Options:

A.

Adding or removing a node may require several network touches.

B.

Adding or removing a SAP may require several network touches.

C.

Adding or removing a service may require several network touches.

D.

Adding or removing an Epipe may require several network touches.

E.

Provisioning is a factor for all Ethernet services.

Question 19

If the max remote-age timer of a B-VPLS is reached, what happens to the remotely learned MAC addresses in the l-VPLS service?

Options:

A.

There is no effect. The MAC addresses for the l-VPLS age out independently of the aging of B-VPLS addresses.

B.

The MAC addresses for the l-VPLS will age out immediately following the remote-age out of the backbone-macs of the B-VPLS.

C.

By default, the remote-age timer of the B-VPLS is configured to 0 and addresses do not age out. The l-VPLS uses its own timer.

D.

The same timer is used for B-VPLS and l-VPLS addresses on the node.

Question 20

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 21

Two management VPLSs have been created. mVPLS 1 and mVPLS 2. Two user VPLS services exist. uVPLS 10 and uVPLS 20. What command can be used to determine which management VPLS is managing uVPLS 10?

Options:

A.

show stp 10

B.

show service vpls 1 stp

C, show service id 10 stp

C.

show service id 1 stp or show service id 2 stp

Question 22

Fill in the blank for this next sentence. Flooded traffic received on any ____________ in the service is replicated to other spoke SDPs and SAPs and not transmitted on any mesh SDPs.

Options:

A.

Spoke SDP

B.

Mesh SDP

C.

Either (a) or (b) will make this sentence true.

D.

Neither (a) nor (b) will make this sentence true.

Question 23

Click on the exhibit below.

Based on the output below which of the following statements is true?

Options:

A.

This Bridge is furthest from the Root Bridge within the VPLS mesh.

B.

This Bridge is the Root Bridge.

C.

SAP 1/1/1 is an Edge Port.

D.

This Bridge is closest to the Root Bridge within the VPLS mesh.

Demo: 23 questions
Total 156 questions