ExamGecko
Search Search Login
Home Home / Nokia / 4A0-115

Nokia 4A0-115 Practice Test - Questions Answers, Page 3

Question list
Search
Search
Open VPLUS File
Convert VPLUS to PDF

Related questions

In the exhibit, the EVPN-IRB is using the interface-ful unnumbered model and is fully operational. Which of the following statements is FALSE?
Examine the exhibit. Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?
Which of the following statements about EVPN Layer-3 services that utilize the interface-ful model is TRUE?
Which of the following statements about multi-homing for a Layer-2 service is TRUE?
Based upon the exhibit, how many MAC-VRFs are there?
Which of the following statements about the EVPN data plane is FALSE?
In the exhibit, VPWS 4 enables communications between CEI and CE2. Which of the following statements regarding the operation of VPWS 4 is FALSE?
In the exhibit, PE2 is receiving an EVPN auto-discovery (A-D) route from PEI. Based on the output, which of the following statements is FALSE?
Examine the exhibit. Which of the following actions is performed by PEI after it receives a BUM packet from CEI?
In the exhibit, an EVI range is configured and the preference-based algorithm is used to elect the designated forwarder (DF) on ESI 1. Which PE is elected as DF for VPLS 10?

Question 21

Report
Export
Collapse

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

A.
Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.
A.
Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.
Answers
B.
ES routes provide the ESI label required to support the split-horizon mechanism.
B.
ES routes provide the ESI label required to support the split-horizon mechanism.
Answers
C.
Auto-discovery (A-D) routes are imported by all PES participating in the EVPN service.
C.
Auto-discovery (A-D) routes are imported by all PES participating in the EVPN service.
Answers
D.
A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.
D.
A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.
Answers
Suggested answer: A

Explanation:

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)

Question 22

Report
Export
Collapse

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

A.
The updates include an Ethernet segment identifier label that is used in loop prevention.
A.
The updates include an Ethernet segment identifier label that is used in loop prevention.
Answers
B.
The updates advertise the Ethernet segment availability in a given EVPN service.
B.
The updates advertise the Ethernet segment availability in a given EVPN service.
Answers
C.
The updates include an MPLS label that is set to a non-zero value.
C.
The updates include an MPLS label that is set to a non-zero value.
Answers
D.
The updates include an Ethernet tag ID that is set to zero.
D.
The updates include an Ethernet tag ID that is set to zero.
Answers
Suggested answer: D

Explanation:

EVPN auto-discovery per Ethernet segment (A-D per ES) routes do not include an Ethernet tag ID that is set to zero.The Ethernet tag ID is set to a non-zero value that identifies the EVPN service instance1.

Verified

Reference:Ethernet Virtual Private Networks (EVPNs)

Question 23

Report
Export
Collapse

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

A.
A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.
A.
A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.
Answers
B.
A PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.
B.
A PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.
Answers
C.
The updates include an Ethernet tag ID that is set to zero.
C.
The updates include an Ethernet tag ID that is set to zero.
Answers
D.
The updates are used to discover all the PES associated with an Ethernet segment.
D.
The updates are used to discover all the PES associated with an Ethernet segment.
Answers
Suggested answer: B

Explanation:

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 24

Report
Export
Collapse

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

A.
Blocks Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
A.
Blocks Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
Answers
B.
Allows Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
B.
Allows Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
Answers
C.
Blocks Tx unicast, blocks Rx unicast, blocks Tx BUM, blocks Rx BUM
C.
Blocks Tx unicast, blocks Rx unicast, blocks Tx BUM, blocks Rx BUM
Answers
D.
Allows Tx unicast, blocks Rx unicast, allows Tx BUM, blocks Rx BUM
D.
Allows Tx unicast, blocks Rx unicast, allows Tx BUM, blocks Rx BUM
Answers
Suggested answer: A

Explanation:

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.

Question 25

Report
Export
Collapse

In the exhibit, the default algorithm is used to elect the designated forwarder (DF) on ESI 1. Which PE is elected as DF for VPLS 10?

A.
PEI
A.
PEI
Answers
B.
PE2
B.
PE2
Answers
C.
PE3
C.
PE3
Answers
D.
PE4
D.
PE4
Answers
Suggested answer: B

Explanation:

PE2 is elected as DF for VPLS 10. The default algorithm uses the lowest IP address of the PEs attached to the same Ethernet segment as the tie-breaker criterion. PE2 has the lowest IP address among PE1, PE2, and PE3.

Question 26

Report
Export
Collapse

In the exhibit, an EVI range is configured and the preference-based algorithm is used to elect the designated forwarder (DF) on ESI 1. Which PE is elected as DF for VPLS 10?

A.
PEI
A.
PEI
Answers
B.
PE2
B.
PE2
Answers
C.
PE3
C.
PE3
Answers
D.
PE4
D.
PE4
Answers
Suggested answer: C

Explanation:

PE3 is elected as DF for VPLS 10. The preference-based algorithm uses the highest preference value of the PEs attached to the same Ethernet segment as the tie-breaker criterion. PE3 has the highest preference value among PE1, PE2, and PE3.

Question 27

Report
Export
Collapse

Examine the exhibit.

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

A.
PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
A.
PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
Answers
B.
PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
B.
PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
Answers
C.
PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
C.
PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
Answers
D.
PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.
D.
PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.
Answers
Suggested answer: C

Explanation:

PE1 sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2. The ESI label is used to implement the split-horizon mechanism and prevent traffic duplication. The packet sent to PE3 does not need an ESI label because PE3 is connected to the same Ethernet segment as PE1.

Question 28

Report
Export
Collapse

In the exhibit,

VPLS 20 is associated with a single-active Ethernet segment on routers PEI and PE3. Which of the following statements is FALSE?

A.
PEI advertises an A-D per ES route which indicates that ESI 1 is operating in a single-active redundancy mode.
A.
PEI advertises an A-D per ES route which indicates that ESI 1 is operating in a single-active redundancy mode.
Answers
B.
PEI advertises an A-D per EVI route which includes a P flag set to I to indicate that PEI is the DF for EVI 20.
B.
PEI advertises an A-D per EVI route which includes a P flag set to I to indicate that PEI is the DF for EVI 20.
Answers
C.
PE3 advertises an A-D per ES route which indicates that ESI I is operating in a single-active redundancy mode.
C.
PE3 advertises an A-D per ES route which indicates that ESI I is operating in a single-active redundancy mode.
Answers
D.
When PEI learns MAC-01, it advertises a MAC/IP route which indicates that MAC-OI is associated with ESI I.
D.
When PEI learns MAC-01, it advertises a MAC/IP route which indicates that MAC-OI is associated with ESI I.
Answers
Suggested answer: D

Explanation:

When PE1 learns MAC-01, it advertises a MAC/IP route which indicates that MAC-01 is associated with ESI 1. This route is used by remote PEs to populate their FDBs with MAC-01 and its corresponding ESI.

Question 29

Report
Export
Collapse

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

A.
Auto-discovery per EVPN instance (A-D per EVI) routes and Auto-discovery per Ethernet segment (A-D per ES) routes only
A.
Auto-discovery per EVPN instance (A-D per EVI) routes and Auto-discovery per Ethernet segment (A-D per ES) routes only
Answers
B.
MAC/IP routes, A-D per EVI routes, and A-D per ES routes
B.
MAC/IP routes, A-D per EVI routes, and A-D per ES routes
Answers
C.
A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes
C.
A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes
Answers
D.
A-D per EVI routes and ES routes only
D.
A-D per EVI routes and ES routes only
Answers
Suggested answer: C

Explanation:

A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes are exchanged to support the operation of a multi-homed EVPN VPWS. These routes are used to discover all PEs associated with an Ethernet segment, indicate the redundancy mode of the Ethernet segment, and elect the designated forwarder for each service.

Question 30

Report
Export
Collapse

In the exhibit, PE2 is receiving an EVPN auto-discovery (A-D) route from PEI. Based on the output, which of the following statements is FALSE?

A.
This route is an A-D per EVPN instance (A-D per EVI) route advertised by PEI for a VPWS.
A.
This route is an A-D per EVPN instance (A-D per EVI) route advertised by PEI for a VPWS.
Answers
B.
This route indicates that the EVPN service configured on PEI is multi-homed.
B.
This route indicates that the EVPN service configured on PEI is multi-homed.
Answers
C.
This route indicates that the EVPN service is configured on PEI with an EVPN instance (EVI) of 113.
C.
This route indicates that the EVPN service is configured on PEI with an EVPN instance (EVI) of 113.
Answers
D.
This route indicates that the EVPN service is configured on PEI with a service MTU of 1514.
D.
This route indicates that the EVPN service is configured on PEI with a service MTU of 1514.
Answers
Suggested answer: D

Explanation:

This route indicates that the EVPN service is configured on PE1 with a service MTU of 1500, not 1514. The service MTU is indicated by the MPLS label value in hexadecimal format. The MPLS label value of 0x05DC corresponds to a decimal value of 1500.

Total 40 questions
Go to page: of 4
ExamGecko

Copyright @2023 ExamGecko | All right reserved

Mail us: [email protected]
About us
Contact us
Twitter X
Facebook
Medium
Convert VPLUS to PDF
Open VPLUS files Easily and Quickly
Privacy Policy
Disclaimer
Terms