Nokia 4A0-115 Exam Actual Questions

Name: Nokia Ethernet Virtual Private Network Services
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SKU: 4A0-115
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The questions for 4A0-115 were last updated on Sep 30, 2024.

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Question No. 1

Examine the exhibit.

Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?

AThe local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.

BThe remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.

CThe local AC tag ID and the remote AC tag ID configured on PE2 must match.

DThe local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.

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Correct Answer: A

The local AC tag ID configured on PE2 must match the local AC tag ID configured on PE1. This ensures that the tag IDs are consistent across both ends of the VPWS service.The remote AC tag ID configured on PE2 does not need to match the remote AC tag ID configured on PE3, as long as they are unique within each PE1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

Question No. 2

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. 3

Examine the exhibit.

Which of the following configuration is NOT required to enable Layer-2 communication between CEI and CE2?

AConfigure an MP-BGP session that allows the exchange of EVPN routes between PEI and PE3.

BConfigure an MP-BGP session that allows the exchange of IPv4 labeled routes between PE3 and PE4.

CConfigure a service distribution point (SDP) on PE3 to reach PE4, and another SDP on PE4 to reach PE3.

DConfigure a local attachment circuit (AC) and a remote AC for VPWS 4 on all PE routers.

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Correct Answer: C

The advertisement of IP-Prefix routes is not required to enable Layer-2 communication between CE1 and CE2. IP-Prefix routes are used to enable Layer-3 communication between different subnets in an EVPN-IRB service.For Layer-2 communication, only MAC/IP routes are required2.

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

Question No. 4

Examine the exhibit.

Which of the following statements about the operation of VPLS 20 is TRUE?

AThe flooding list maintained by PEI for VPLS 20 contains three entries: PE2, PE3, and PE4.

BPE3 advertises an IMET route to PEI when its VPLS 20's mesh-SDP becomes operationally UP.

CPE3 signals a service label to PE4 when its VPLS 20 is enabled and is bound to an operational SDP.

DPEI advertises a MAC route for MAC-OI when its VPLS 2(Ys SAP becomes operationally UP.

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Correct Answer: D

PE1 does not advertise a MAC route for MAC-01 when its VPLS 20's SAP becomes operationally UP.PE1 advertises an EVPN MAC/IP route for MAC-01, which includes the IP address of Host 1 and the ESI of the Ethernet segment1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

Question No. 5

In the exhibit, the EVPN-IRB is configured to use the interface-ful unnumbered model. Which of the following statements regarding the route advertisement is FALSE?

APEI advertises an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE3. The BGP update includes MAC-OI as on overlay index.

BPEI advertises an EVPN MAC route for MAC-OI to PE3. The BGP update includes the route-target value configured for VPRN 15.

CPE3 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE4. The BGP update includes an MPLS service label.

DPE4 advertises an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE2. The BGP update includes MAC-04 as an overlay index.

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Correct Answer: D

PE4 does not advertise an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE2.PE4 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE2, which includes the MPLS service label of VPRN 152.

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

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