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Here are sample Nokia Ethernet Virtual Private Network Services (4A0-115) Exam questions from real exam. You can get more Nokia Service Routing Architect (4A0-115) Exam premium practice questions at TestInsights.

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Question 1

A Layer-3 EVPN service is configured to use the interface-ful unnumbered forwarding model. Which of the following statements is FALSE?

AEach participating PE advertises a MAC/IP route that carries the MAC address of SBD IRB interface.

BIP-Prefix routes exchanged between PES include a non-zero MAC address as an overlay index.

CThe VPRN service is configured to allow the advertisement of IP prefixes.

DThe SBD IRB interface configured in the VPRN service has no IP address assigned to it.

Correct : D

The SBD IRB interface configured in the VPRN service has an IP address assigned to it.The IP address is used as a gateway IP address for hosts in the corresponding subnet2.

Verified Reference:Nokia Ethernet Virtual Private Network Services Course | Nokia

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AEach participating PE advertises a MAC/IP route that carries the MAC address of SBD IRB interface.

BIP-Prefix routes exchanged between PES include a non-zero MAC address as an overlay index.

CThe VPRN service is configured to allow the advertisement of IP prefixes.

DThe SBD IRB interface configured in the VPRN service has no IP address assigned to it.

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Question 2

Which of the following best describes the operation of a non-designated forwarder (non-DF) in a single-active Ethernet segment?

ABlocks Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM

BAllows Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM

CBlocks Tx unicast, blocks Rx unicast, blocks Tx BUM, blocks Rx BUM

DAllows Tx unicast, blocks Rx unicast, allows Tx BUM, blocks Rx BUM

Correct : A

A non-designated forwarder (non-DF) in a single-active Ethernet segment blocks Tx unicast, allows Rx unicast, blocks Tx BUM, and allows Rx BUM. This prevents traffic duplication and ensures that only the DF forwards traffic to and from the CE.

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ABlocks Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM

BAllows Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM

CBlocks Tx unicast, blocks Rx unicast, blocks Tx BUM, blocks Rx BUM

DAllows Tx unicast, blocks Rx unicast, allows Tx BUM, blocks Rx BUM

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Question 3

Which of the following statements about the EVPN Layer 2 Attributes extended community is FALSE?

AIt is advertised with the auto-discovery per EVPN instance (A-D per EVI) route.

BIt is applicable to EVPN VPLS services.

CIt specifies the service maximum transmission unit (MTU).

DIt specifies a P flag that indicates whether the advertising PE is a primary PE.

Correct : B

The EVPN Layer 2 Attributes extended community is not applicable to EVPN VPLS services.It is applicable to EVPN VPWS services, where it carries information such as the tag ID and the service MTU1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

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AIt is advertised with the auto-discovery per EVPN instance (A-D per EVI) route.

BIt is applicable to EVPN VPLS services.

CIt specifies the service maximum transmission unit (MTU).

DIt specifies a P flag that indicates whether the advertising PE is a primary PE.

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Question 4

Which of the following statements about the operation of a single-homed EVPN VPWS is TRUE?

AThe same tag ID must be configured for the local attachment circuit (AC) at each PE.

BEach PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.

CThe advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.

DEach PE verifies that the received tag ID matches its configured local AC tag ID.

Correct : C

The advertised A-D per EVI route includes a non-zero tag ID and a zero MPLS label.The tag ID is used to identify the VPWS service, while the MPLS label is not used for single-homed VPWS services1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

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AThe same tag ID must be configured for the local attachment circuit (AC) at each PE.

BEach PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.

CThe advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.

DEach PE verifies that the received tag ID matches its configured local AC tag ID.

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Question 5

Examine the exhibit.

Which of the following statements about the EVPN routes exchanged for EVPN VPWS 2 is TRUE?

APEI advertises an A-D per EVI route that includes a tag ID set to 40.

BPEI advertises an A-D per EVI route that includes a non-zero Layer-2 MTLJ.

CPE2 advertises an A-D per EVI route that includes a P flag set to I.

DAll PES advertise a MAC route that includes a non-zero MPLS label.

Correct : D

All PEs do not advertise a MAC route that includes a non-zero MPLS label. Only PE1 advertises a MAC route that includes a non-zero MPLS label, which is used by PE2 to forward traffic to PE1.PE2 and PE3 do not advertise any MAC routes for VPWS 21.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

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APEI advertises an A-D per EVI route that includes a tag ID set to 40.

BPEI advertises an A-D per EVI route that includes a non-zero Layer-2 MTLJ.

CPE2 advertises an A-D per EVI route that includes a P flag set to I.

DAll PES advertise a MAC route that includes a non-zero MPLS label.

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