Pass Exam Questions Efficiently With 4A0-115 Questions (2023) [Q17-Q37]

Q17. Based upon the exhibit,

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

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

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

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

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

Q18. 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

Q19. Which of the following statements about EVPN auto-discovery per Ethernet segment (A-D per ES) routes is TRUE?

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

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

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

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

Q20. 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.

Q21. 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.

Q22. 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.

Q23. 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.

Q24. 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.

Q25. Proxy-ARP/ND is operational for a VPLS. Which of the following statements is FALSE?

The PE has proxy-ARP and dynamic-populate enabled for the VPLS.

The proxy-ARP table is populated by snooping IP packets received from remote PEs.

When the PE learns a local host IP address, it adds an entry into its proxy-ARP table.

The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.

Q26. Based upon the exhibit, which of the following statements is FALSE?

VPLS 10 must be configured with two BGP instances on PE3 and PE4.

On PE3 and PE4, VPLS 10 must be configured with two different route-distinguisher values: one for VXLAN and another for MPLS.

On PE3 and PE4, VPLS 10 must be configured with two different route-target values: one for VXLAN and another for MPLS.

A BGP export policy is required on PE3 and PE4 to ensure that IMET routes originated with VXLAN encapsulation are not advertised to the peer across the core network.

Q27. 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.

Q28. In the exhibit, VPWS 4 enables communications between CEI and CE2. Which of the following statements regarding the operation of VPWS 4 is FALSE?

PEI advertises an auto-discovery per EVPN instance (A-D per EVI) route to PE3 as soon as the SAP becomes operationally

PE3 advertises an IMET route to PEI as soon as VPWS 4 is administratively enabled.

PEI and PE3 exchange their service labels using A-D per EVI routes.

PE3 and PE4 exchange their service labels over an established targeted LDP session.

Q29. 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.

Q30. 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.

Q31. 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

Q32. 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.

Pass Exam Questions Efficiently With 4A0-115 Questions (2023) [Q17-Q37]

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