Most Recent Nokia 4A0-115 Exam Questions & Answers

Prepare for the Nokia Ethernet Virtual Private Network Services exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

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The questions for 4A0-115 were last updated on Nov 22, 2024.

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Question No. 1

In the exhibit, VPWS 4 enables communications between CEI and CE2. Which of the following statements regarding the operation of VPWS 4 is FALSE?

APEI advertises an auto-discovery per EVPN instance (A-D per EVI) route to PE3 as soon as the SAP becomes operationally

BPE3 advertises an IMET route to PEI as soon as VPWS 4 is administratively enabled.

CPEI and PE3 exchange their service labels using A-D per EVI routes.

DPE3 and PE4 exchange their service labels over an established targeted LDP session.

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Correct Answer: C

PE1 and PE3 do not exchange their service labels using A-D per EVI routes.PE1 and PE3 exchange their service labels using MAC routes, which are advertised when their local ACs become operationally UP1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

Question No. 2

A. Proxy-ARP/ND is operational for a VPLS. Which of the following statements is FALSE?

BThe PE has proxy-ARP and dynamic-populate enabled for the VPLS.

CThe proxy-ARP table is populated by snooping IP packets received from remote PEs.

DWhen the PE learns a local host IP address, it adds an entry into its proxy-ARP table.

EThe PE advertises a MAC/IP route that includes the MAC and IP address of a local host.

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Correct Answer: C

When the PE learns a local host IP address, it does not add an entry into its proxy-ARP table. The proxy-ARP table is populated by snooping IP packets received from remote PEs. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.

Question No. 3

In the exhibit, the EVPN-IRB is using the interface-ful unnumbered model and is fully operational. Which of the following statements is FALSE?

AAn MP-BGP session that supports the advertisement of VPN-IPv4 routes is established between PE3 and PE4.

BAn MP-BGP session that supports the advertisement of EVPN routes is established between PEI and PE2.

COn PE3, the routing table for VPRN 15 contains an entry for 10.10.1.0/24. This entry is resolved to MAC-OI as an overlay index.

DOn PE3, the routing table for VPRN 15 contains an entry for 10.10.4.0/24. This entry is resolved using a transport tunnel towards PE

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Correct Answer: C

On PE3, the routing table for VPRN 15 does not contain an entry for 10.10.1.0/24.This entry is not needed because Host 1 is in the same subnet as the SBD IRB interface on PE3, and PE3 can reach Host 1 using its MAC address2.

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

Question No. 4

Which of the following statements about EVPN auto-discovery per EVPN instance (A-D per EVI) routes is FALSE?

AA PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.

BA PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.

CThe updates include an Ethernet tag ID that is set to zero.

DThe updates are used to discover all the PES associated with an Ethernet segment.

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Correct Answer: B

A PE does not advertise an A-D per EVI route for each operational service defined on an Ethernet segment. A PE advertises a single A-D per EVI route for all services defined on an Ethernet segment.

Question No. 5

Which of the following statements about the EVPN route types used to support multi-homing is TRUE?

AEthernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.

BES routes provide the ESI label required to support the split-horizon mechanism.

CAuto-discovery (A-D) routes are imported by all PES participating in the EVPN service.

DA-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.

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Correct Answer: A

Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.The redundancy mode can be either single-active or all-active, and it determines how traffic is forwarded to and from a multi-homed CE1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

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