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4A0-115 Nokia Ethernet Virtual Private Network Services Questions and Answers

Questions 4

Which of the following statements about EVPN auto-discovery per Ethernet segment (A-D per ES) routes is TRUE?

Options:

A.

The updates include an Ethernet segment identifier label that is used in loop prevention.

B.

The updates advertise the Ethernet segment availability in a given EVPN service.

C.

The updates include an MPLS label that is set to a non-zero value.

D.

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

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Questions 5

Based on the exhibit below, which of the following statements is FALSE?

4A0-115 Question 5

Options:

A.

When forwarding BUM traffic, the local PE must replicate the traffic and send it as unicast to the advertising neighbor.

B.

The MPLS label 524284 presented indicates the service label value that the neighbor 10.10.10.2 uses to forward BUM traffic to PEI.

C.

When forwarding BUM traffic, the local PE uses an MPLS transport tunnel towards the advertising neighbor.

D.

The IMET route is imported by a local VPLS configured with a route-target value of 65100:10.

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Questions 6

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

  • Blocks Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
  • Allows Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
  • Blocks Tx unicast, blocks Rx unicast, blocks Tx BUM, blocks Rx BUM

Options:

A.

Allows Tx unicast, blocks Rx unicast, allows Tx BUM, blocks Rx BUM

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Questions 7

Examine the exhibit.

4A0-115 Question 7

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 8

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

Options:

A.

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

B.

It is applicable to EVPN VPLS services.

C.

It specifies the service maximum transmission unit (MTU).

D.

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

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Questions 9

In the exhibit,

4A0-115 Question 9

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 10

Examine the exhibit.

4A0-115 Question 10

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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Questions 11

Which of the following EVPN routes are exchanged to support the operation of a multi-homed EVPN VPWS?

Options:

A.

Auto-discovery per EVPN instance (A-D per EVI) routes and Auto-discovery per Ethernet segment (A-D per ES) routes only

B.

MAC/IP routes, A-D per EVI routes, and A-D per ES routes

C.

A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes

D.

A-D per EVI routes and ES routes only

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Questions 12

Based upon the exhibit,

4A0-115 Question 12

which of the following statements about the forwarding of BUM traffic is FALSE?

Options:

A.

PE3 replicates the traffic and sends it to all PES in its VPLS I flooding list.

B.

PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.

C.

PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.

D.

PE2 decapsulates the packets received from PE3 and forwards the frames to CE2.

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Exam Code: 4A0-115
Exam Name: Nokia Ethernet Virtual Private Network Services
Last Update: Dec 2, 2024
Questions: 40

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