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Nokia 4A0-C02 - Nokia SRA Composite Exam

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Total 639 questions

In RSTP, how is the root bridge selected?

A.

The switch with the highest bridge-id is selected as root.

B.

The switch with the lowest bridge-id is selected as root.

C.

The switch with the highest MAC address is selected as root

D.

The switch with the lowest MAC address is selected as root.

MC-LAG is only supported on network ports.

A.

TRUE

B.

FALSE

Which of the following best describes the difference between VPWS and VPLS?

A.

Unlike VPLS. VPWS appears as a multi-hop network to the customers.

B.

Unlike VPLS, VPWS allows CEs that are member of the same service instance to communicate with each other as if they are connected via a bridged LAN.

C.

Unlike VPWS, VPLS allows customers to view the network as a routed network.

D.

Unlike VPWS, VPLS is a service where customer MAC addresses are learned.

In IEEE 802.1ag, which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)

A.

MEP

B.

MAP

C.

MIP

D.

MUP

What is the default remote-age timer of a B-VPLS?

A.

The same timer is used in all VPLS types.

B.

Higher than the default timer of an I-VPLS.

C.

Lower than the default timer of an l-VPLS.

D.

The same timer as an l-VPLS.

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

A.

TRUE

B.

FALSE

What are the benefits of a hierarchical VPLS architecture? (Choose 3)

A.

Increases scalability

B.

Reduces the FDB size within a VPLS instance

C.

Reduces replication and bandwidth utilization from the MDU device to the core network

D.

Easier to manage

E.

Reduces the routing table size

Click on the exhibit below.

In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes down and SAP 1 transitions to the forwarding state? Select the most accurate statement.

A.

A Spanning Tree BPDU will be sent across the mesh flushing the FDB table in all devices participating in the VPLS instance.

B.

Stale information will be used within the VPLS instance to forward traffic until the FDB ages out.

C.

An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with the PE that the failure occurred on will be flushed.

D.

An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB in the VPLS instance will be flushed.

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

A.

It flushes the local FDB speeding recovery

B.

It 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.

C.

On 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.

D.

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

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?

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:*".

Click on the exhibit below.

Management VPLS 100 has been created for redundant spoke-SDP connections. User VPLSs 10 and 20 are using the same spoke-SDPs that are being managed by VPLS 100. Unexpected behavior has been reported. Based on the following output, what is the most likely reason for the unexpected behavior?

A.

VPLS 100 was not actually configured as a management VPLS.

B.

VPLS 10 and VPLS 20 are not actually configured as a user VPLS.

C.

VPLS 10 and VPLS 20 are not using the same spoke-sdps that the management VPLS is using.

D.

Based on the output there is now way of telling if there is a problem with the configuration.

Click on the exhibit below.

Based on the output below which of the following statements is true? (Choose 2)

A.

VPLS1500 is a user VPLS.

B.

VPLS 1500 is management VPLS.

C.

Spanning tree BPDUs for the management VPLS are tagged.

D.

Spanning tree BPDUs for the management VPLS are untagged.

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.

B.

R4 and R3 will remain reachable.

C.

No devices will be reachable.

RSTP blocks a spoke-sdp using a management VPLS. Is traffic affected on an ES using the same transport SDP?

A.

Yes

B.

No

Click on the exhibit below.

Which ports will become root ports? (Choose 3)

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