4A0-115 Questions – Truly Beneficial For Your Nokia Exam (Updated 40 Questions) [Q12-Q28] – IT Certification Exam Questions & Answers

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4A0-115 Questions – Truly Beneficial For Your Nokia Exam (Updated 40 Questions)

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Nokia 4A0-115 Exam Syllabus Topics:

Topic	Details
Topic 1	Operation of preference-based DF election algorithm Aliasing mechanism used to enable load-balancing
Topic 2	Operation of a single-active EVPN VPWS EVPN route types advertised to support EVPN VPWS
Topic 3	Layer-3 symmetric interface-ful numbered model EVPN route types advertised to support EVPN-IRB
Topic 4	Use of EVPN to support Layer-3 routing EVPN basic operation
Topic 5	Configuring an EVPN VPLS using VXLAN encapsulation Use of EVPN MAC routes to populate the VPLS FDB tables
Topic 6	EVPN route types advertised to support EVPN VPLS Use of EVPN IMET routes to populate the VPLS flooding lists
Topic 7	Configuring an EVPN VPLS using MPLS encapsulation EVPN-VXLAN and EVPN-MPLS interconnect for a VPLS

NEW QUESTION 12
The interface-ful numbered model is used for a Layer-3 EVPN service. Which of the following statements is FALSE?

EVPN routes are advertised with a service label associated with the SBD VPLS.

IP-Prefix routes exchanged between PES include a non-zero gateway IP address as an overlay index.

EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts.

EVPN MAC/IP routes are used to advertise the MAC and IP addresses of SBD IRB interfaces.

NEW QUESTION 13
Which of the following statements about multi-homing for a Layer-2 service is TRUE?

In the single-active mode, the CE requires a LAG to be configured between the CE and all attached PEs.

In the single-active mode, the CE forwards traffic to all attached PES and receives traffic from a single PE.

In the all-active mode, all PES attached to a CE can forward traffic to and from the CE.

The Nokia 7750 SR supports a CE being multi-homed to a maximum of two PEs.

NEW QUESTION 14
In the exhibit, the EVPN-IRB is using the interface-ful unnumbered model and is fully operational. Which of the following statements isFALSE?

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

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

On 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.

On 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 PEA.

NEW QUESTION 15
A Layer-3 EVPN service is configured to use the interface-ful unnumbered forwarding model. Which of the following statements isFALSE?

Each participating PE advertises a MAC/IP route that carries the MAC address of SBD IRB interface.

IP-Prefix routes exchanged between PES include a non-zero MAC address as an overlay index.

The VPRN service is configured to allow the advertisement of IP prefixes.

The SBD IRB interface configured in the VPRN service has no IP address assigned to it.

NEW QUESTION 16
In the exhibit, the interface-less forwarding model is used for the Layer-3 EVPN service. Which of the following statements about traffic forwarding from Host 1 to Host 2 is FALSE?

PEI consults the FDB of RVPLS 1 and forwards the traffic to the local interface of VPRN 11.

PEI encapsulates the packet with two labels: an outer transport label and an inner service label.

PE2 inspects the service label and determines that it is associated with RVPLS 2.

PE2 consults the FDB of RVPLS 2 and forwards the traffic to Host 2.

NEW QUESTION 17
What are EVPN inclusive multicast Ethernet tag (IMET) routes used for?

To advertise the MAC or MAC/IP addresses of locally-learned hosts

To advertise the redundancy mode of a local Ethernet segment

To discover all PES participating in the same VPIS service

To discover all PES attached to the same Ethernet segment

NEW QUESTION 18
Which of the following statements about the EVPN route types used to support multi-homing is TRUE?

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

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

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

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

NEW QUESTION 19
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?

MAC-OI

MAC-03

MAC-04

MAC-11

NEW QUESTION 20
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?

PEI

PE2

PE3

PE4

NEW QUESTION 21
An operator configures an EVPN-IRB that uses the interface-ful unnumbered forwarding model on a Nokia
7750 service router. Which ofthe following statements regarding the configuration performed on each participating PE is FALSE?

A supplementary broadcast domain (SBD) is configured as a routed VPLS.

A VPRN service is configured and has an interface bound to the local VPLS.

The advertisement of IP-Prefix routes is enabled in the SBD VPLS.

An IP address is configured in the VPRN interface that is bound to the SBD VPLS.

NEW QUESTION 22
Which of the following statements about the EVPN Layer 2 Attributes extended community is FALSE?

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

It is applicable to EVPN VPLS services.

It specifies the service maximum transmission unit (MTU).

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

NEW QUESTION 23
Which of the following statements about an EVPN with integrated routing and bridging (EVPN-IRB) service is FALSE?

This service requires the use of EVPN-MPLS for data plane.

In this service, the IRB interface acts as a default gateway for hosts in the corresponding subnet.

This service consists of a VPRN and multiple VPLSs.

This service enables the use of EVPN to provide connectivity between hosts in different subnets.

NEW QUESTION 24
In the exhibit,

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

PEI advertises an A-D per ES route which indicates that ESI 1 is operating in a single-active redundancy mode.

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.

PE3 advertises an A-D per ES route which indicates that ESI I is operating in a single-active redundancy mode.

When PEI learns MAC-01, it advertises a MAC/IP route which indicates that MAC-OI is associated with ESI I.

NEW QUESTION 25
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

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

NEW QUESTION 26
Based on the exhibit below, which of the following statements is TRUE?

PE2 advertises this BGP update for a locally-configured VPWS service.

PEI uses this BGP update to build the flooding list of the associated service.

PEI uses MPLS label 524284 when sending traffic destined to

Neighbor 10.10.10.2 is connected to a multi-homed CE.

NEW QUESTION 27
Which of the following statements about EVPN Layer-3 services that utilize the interface-ful model is TRUE?

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

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

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

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

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