Ultimate Guide to Prepare 4A0-115 Certification Exam for Nokia Service Routing Architect in 2024 [Q15-Q35]

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Ultimate Guide to Prepare 4A0-115 Certification Exam for Nokia Service Routing Architect in 2024

Use Real 4A0-115 Dumps – Nokia Correct Answers updated on 2024

Nokia 4A0-115 Exam Syllabus Topics:

Topic	Details
Topic 1	Operation of a single-active EVPN VPWS EVPN route types advertised to support EVPN VPWS
Topic 2	Use of EVPN to support Layer-3 routing EVPN basic operation
Topic 3	EVPN route types advertised to support EVPN VPLS Use of EVPN IMET routes to populate the VPLS flooding lists
Topic 4	Operation of preference-based DF election algorithm Aliasing mechanism used to enable load-balancing
Topic 5	Layer-3 symmetric interface-ful numbered model EVPN route types advertised to support EVPN-IRB

QUESTION 15
Examine the exhibit.

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

PEI brings the SAP in VPWS 4 operationally down.

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

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

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

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.

QUESTION 17
Which of the following statements about PE-to-PE MAC address advertisement is FALSE?

The service distinguisher (label or VNI) is advertised with the MAC/IP EVPN update.

Route targets are used to uniquely identify routes between EVIS in the case of MAC address overlaps.

A PE uses a single MP-BGP session with a remote peer to exchange the routes for all EVIs.

A PE advertises locally-learned MAC addresses to remote PES using EVPN type-2 routes.

QUESTION 18
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?

This route is an A-D per EVPN instance (A-D per EVI) route advertised by PEI for a VPWS.

This route indicates that the EVPN service configured on PEI is multi-homed.

This route indicates that the EVPN service is configured on PEI with an EVPN instance (EVI) of 113.

This route indicates that the EVPN service is configured on PEI with a service MTU of 1514.

QUESTION 19
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.

QUESTION 20
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

QUESTION 21
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?

PEI 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.

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

PE3 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE4. The BGP update includes an MPLS service label.

PE4 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.

QUESTION 22
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.

QUESTION 23
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.

QUESTION 24
Which of the following EVPN routes are exchanged to support the operation of a multi-homed EVPN VPWS?

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

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

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

A-D per EVI routes and ES routes only

QUESTION 25
Which of the following statements about EVPN auto-discovery per EVPN instance (A-D per EVI) routes is FALSE?

A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.

A PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.

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

The updates are used to discover all the PES associated with an Ethernet segment.

QUESTION 26
Examine the exhibit.

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

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

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

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

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

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.

QUESTION 28
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

QUESTION 29
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

QUESTION 30
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.

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Ultimate Guide to Prepare 4A0-115 Certification Exam for Nokia Service Routing Architect in 2024 [Q15-Q35]

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