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4A0-115 Sample Questions Answers

Questions 4

In the exhibit,

MACI moves from PEI to PE2. Which of the following actions related to this MAC address mobility is performed?

Options:

A.

CEI generates an update message to PEI withdrawing its MAC.

B.

PEI generates an update message to remote PES identifying the new location of CEI.

C.

PE2 advertises a MAC/IP route for MACI with a sequence number higher than that received from PEI.

D.

PE3 waits to receive a data packet from CEI to update its FDB entry for MACI.

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Questions 5

Which of the following statements about EVPN Layer-3 services that utilize the interface-ful model is TRUE?

Options:

A.

EVPN MAC/IP routes are used to advertise the IP prefixes of subnets attached to a VPRN.

B.

VPRN instances are interconnected using a supplementary broadcast domain (SBD) VPLS.

C.

Intra-subnet traffic is carried over the tunnels provided by the SBD VPLS.

D.

The MAC/IP routing information is used to populate the VPRN routing table at the remote PEs.

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Questions 6

Examine the exhibit.

Which of the following statements about the operation of EVPN VPWS 4 is FALSE?

Options:

A.

PEI brings the SAP in VPWS 4 operationally down.

B.

PE3 sets the P flag in its advertised A-D per EVI route to I.

C.

PE2 receives a single A-D per EVI route. The route is originated from PE3.

D.

PE2 receives two A-D per ES routes: one from PEI and another from PE3.

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Questions 7

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

Options:

A.

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

B.

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

C.

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

D.

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

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Questions 8

Examine the exhibit.

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

Options:

A.

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

B.

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

C.

PE2 advertises an A-D per EVI route that includes a P flag set to I.

D.

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

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Questions 9

Examine the exhibit.

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

Options:

A.

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

B.

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

C.

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

D.

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

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Questions 10

In the exhibit, the interface-ful numbered model is used for the Layer-3 EVPN service. Which of the following is used as the source MAC address in the packets sent from PEI when forwarding customer traffic to Host 2?

Options:

A.

MAC-OI

B.

MAC-03

C.

MAC-04

D.

MAC-11

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Questions 11

Which of the following statements does NOT describe the operation of the Layer-3 EVPN asymmetric forwarding model?

Options:

A.

All VPLS instances must be configured on all PES regardless of whether they have a local host or not.

B.

EVPN IP-Prefix routes are used to populate the VPRN VRF tables.

C.

The egress PE does not perform any Layer-3 route look up to forward traffic.

D.

The ingress PE performs both Layer-2 and Layer-3 look ups when forwarding traffic between subnets.

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Questions 12

Examine the exhibit.

Which of the following actions is performed by PEI after it receives a BUM packet from CEI?

Options:

A.

PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.

B.

PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.

C.

PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.

D.

PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.

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Exam Code: 4A0-115
Exam Name: Nokia Ethernet Virtual Private Network Services
Last Update: May 5, 2024
Questions: 40
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