nokia 4a0-105 practice test

Nokia Virtual Private LAN Services

Last exam update: Dec 03 ,2025
Page 1 out of 11. Viewing questions 1-15 out of 156

Question 1

Which of the following technologies allows for two explicit VLAN tags to be received from a customer
device?

  • A. RSVP-TE
  • B. SP-VLAN
  • C. QinQ
  • D. Dot1Q
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Answer:

C


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Question 2

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

  • A. MAC learning
  • B. SA filtering
  • C. Routing table population
  • D. Frame forwarding
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Answer:

A


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Question 3

What are the limitations of a traditional layer 2 switch? (Choose 3}

  • A. Isolates collision domains.
  • B. Requires layer 2 loop prevention.
  • C. Slow response to topology changes.
  • D. Limited to 4094 vlans per switch.
  • E. Increased flooding.
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Answer:

B, C, D


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Question 4

Which of the following statements about the VC-ID is false?

  • A. The vc-id is signaled in the control plane.
  • B. The vc-id is part of the data plane encapsulation.
  • C. There is a vc-id to vc-label mapping.
  • D. The vc-id has point to point significance.
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Answer:

B


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Question 5

Assuming TLDP and RSVP are both being used in an MPLS network core which of the following
statements is true?

  • A. TLDP is used to create the inner label, RSVP is used to create the outer label.
  • B. TLDP is used to create the outer label, RSVP is used to create the inner label.
  • C. TLDP and RSVP cannot be used in the same network since they both provide the same label.
  • D. When RSVP is used, TLDP must be disabled and static vc labels should be used.
  • E. TLDP and RSVP can be used to create either labels based on how they are configured.
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Answer:

A


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Question 6

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.

  • 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.
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Answer:

B


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Question 7

Port 1/1/1 has been configured as an access port with QinQ encapsulation. Which of the following
three statements are true for ingress traffic assuming default configuration? (Choose 3)

  • A. sap 1/1/1:*.0 is a valid sap id.
  • B. sap 1/1/1:100* will accept frames with a single tag of 100.
  • C. sap 1/1/1:200* will strip the top tag of 200 and the bottom tag will be transparently passed.
  • D. sap 1/1/1:0* will accept all untagged frames.
  • E. sap 1/1/1:0* will accept any tagged frames.
Mark Question:
Answer:

B, C, D


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Question 8

Which of the following statements relating to VPLS is false?

  • A. A VPLS is a multipoint Layer 2 service.
  • B. A VPLS allows multiple customer sites to be connected in a single bridged domain.
  • C. A VPLS on a single node requires a SDP.
  • D. With an IP/MPLS infrastructure, service providers can provide multiple VPLS services over a common IP/MPLS infrastructure.
  • E. The VPLS switches traffic based on MAC address associated to the appropriate SAP.
Mark Question:
Answer:

C


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Question 9

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?

  • 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*".
Mark Question:
Answer:

D


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Question 10

Which of the following statements is false?

  • A. VPLS is a bridged LAN service.
  • B. VPLS provides L2 VPN services to CEs.
  • C. VPLS is a point-to-point service where CEs are presented with point-to-point virtual circuits.
  • D. CEs that are members of the same VPLS service instance communicate with each other as if they are connected via a bridged LAN.
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Answer:

C


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Question 11

Click on the exhibit below.

The following VPLS services and SAPs have been configured. Which of the following statements is
true?

  • A. All untagged frames will be dropped.
  • B. The source MAC address of a frame with a top tag of 200 and bottom tag of 300 will be populated in VPLS 3.
  • C. All frames with more than one tag will be dropped.
  • D. The source MAC address of a frame with a single tag of 500 will be populated in VPLS 1.
  • E. The source MAC address of a frame with a top tag of 100 will be populated in VPLS 2.
Mark Question:
Answer:

E


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Question 12

Click on the exhibit below.

If the SDP between R2 and R1 goes down, what devices will be reachable from R2 through the VPLS?

  • A. Only R4 will be reachable through the VPLS. B All devices will be reachable through the VPLS.
  • C. R4 and R3 will remain reachable.
  • D. No devices will be reachable.
Mark Question:
Answer:

A


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Question 13

What is the default service-mtu for a VPLS service?

  • A. 1500
  • B. 1514
  • C. 1518
  • D. It depends on the access port MTU.
  • E. It depends on the network port MTU.
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Answer:

B


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Question 14

Click on the exhibit below.

The VPLS service MTU on R2 is 1514 bytes. What must the service MTU be on all other routers
participating in the VPLS?

  • A. The service MTU must be equal to or smaller than 1514 bytes.
  • B. The service MTU must be 1514 bytes.
  • C. The service MTU must be equal to or greater than 1514 bytes.
  • D. The service MTU can be any value.
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Answer:

B


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Question 15

What is the default fdb size for a VPLS service?

  • A. 100
  • B. 1
  • C. 25
  • D. 250
Mark Question:
Answer:

D


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