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Nokia 4A0-105 - Questions & Answers

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Question 1
Single choice

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

Question 2
Single choice

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

Question 3
Multiple choice

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.

Question 4
Single choice

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.

Question 5
Single choice

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.

Question 6
Single choice

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.

Question 7
Multiple choice

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.

Question 8
Single choice

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.

Question 9
Single choice

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*".

Question 10
Single choice

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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