Nokia 4A0-105 Exam Practice Test Instant Access

Question 1

Consider a large metro-to-metro VPLS network interconnected with a mesh of mesh-SDPs. Which of the following statements does NOT apply to this situation?

ABandwidth and replication inefficiency can occur on inter-metro links if there is a lot of multicast traffic

BThe number of control sessions grows exponentially in a fully meshed network.

CSpanning-tree is required to prevent loops when using mesh SDPs on the inter-metro links.

DNetwork touches increase with each node added to the mesh.

Answer : C

Question 2

What scaling factors should a network engineer be aware of when designing VPLS networks? (Choose 3)

AControl plane scaling.

BData plane scaling.

CNetwork touches.

DRoute table reduction.

EOAM tools.

Answer : A, B, C

Question 3

Click on the exhibit below.

The SAP on PE-A has been configured with dot1q encapsulation. The SAP on PE-B has been configured with qinq encapsulation. CE-A sends frames with a single tag of 100. The VLAN tag from CE-A must be passed transparently. CE-B is expecting a frame with a top tag of 200 and bottom tag of 100. Which of the following is the correct SAP id for PE-B?

Asap 1/1/1:200.100

Bsap 1/1/1:200*

Csap 1/1/1:*

Dsap 1/1/1:0*

Answer : B

Question 4

What type of SDP cannot be configured in an l-VPLS?

AMesh-sdp

BSpoke-sdp

CMPLS

DGRE

Answer : A

Question 5

What is the SA in the Ethernet frame used for by a layer 2 switch?

AMAC learning

BSA filtering

CRouting table population

DFrame forwarding

Answer : A

Question 6

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

AIt flushes the local FDB speeding recovery

BIt 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.

COn 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.

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

Answer : C

Question 7

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

ATRUE

BFALSE

Answer : B

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