Nokia 4A0-115 Exam Questions Instant Access

Question 1

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

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

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

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

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

Answer : A

When forwarding BUM traffic, the local PE does not replicate the traffic and send it as unicast to the advertising neighbor. Instead, the local PE uses an MPLS transport tunnel towards the advertising neighbor and sends the traffic with an MPLS label that indicates the service.

Question 2

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?

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

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

CPE2 inspects the service label and determines that it is associated with RVPLS 2.

DPE2 consults the FDB of RVPLS 2 and forwards the traffic to Host 2.

Answer : B

PE1 does not encapsulate the packet with two labels: an outer transport label and an inner service label.PE1 encapsulates the packet with three labels: an outer transport label, a service label associated with VPRN 11, and a service label associated with RVPLS 11.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

Question 3

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

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

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

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

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

Answer : C

The advertisement of IP-Prefix routes is not enabled in the SBD VPLS.The advertisement of IP-Prefix routes is enabled in the VPRN service that is associated with the SBD VPLS2.

Verified Reference:Nokia Ethernet Virtual Private Network Services Course | Nokia

Question 4

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

APE2 advertises this BGP update for a locally-configured VPWS service.

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

CPEI uses MPLS label 524284 when sending traffic destined to

DNeighbor 10.10.10.2 is connected to a multi-homed CE.

Answer : B

PE1 uses this BGP update to build the flooding list of the associated service. The update contains an IMET route that indicates that neighbor 10.10.10.2 is participating in a VPLS service with a network identifier of 10.

Question 5

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

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

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

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

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

Answer : D

EVPN MAC/IP routes are not used to advertise the MAC and IP addresses of SBD IRB interfaces.EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts attached to the SBD VPLS2.

Verified Reference:Nokia Ethernet Virtual Private Network Services Course | Nokia

Question 6

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?

APEI 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.

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

CPE3 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE4. The BGP update includes an MPLS service label.

DPE4 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.

Answer : D

PE4 does not advertise an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE2.PE4 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE2, which includes the MPLS service label of VPRN 152.

Verified Reference:Nokia Ethernet Virtual Private Network Services Course | Nokia

Question 7

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

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

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

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

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

Answer : D

The SBD IRB interface configured in the VPRN service has an IP address assigned to it.The IP address is used as a gateway IP address for hosts in the corresponding subnet2.

Verified Reference:Nokia Ethernet Virtual Private Network Services Course | Nokia

Nokia Ethernet Virtual Private Network Services 4A0-115 Exam Questions