Free Nokia Ethernet Virtual Private Network Services Exam 4A0-115 Exam Practice Test

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

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

• 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.

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?

• 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.

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

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.

Which of the following statements does NOT describe the operation of the Layer-3 EVPN asymmetric forwarding model?

• All VPLS instances must be configured on all PES regardless of whether they have a local host or not.
• EVPN IP-Prefix routes are used to populate the VPRN VRF tables.
• The egress PE does not perform any Layer-3 route look up to forward traffic.
• The ingress PE performs both Layer-2 and Layer-3 look ups when forwarding traffic between subnets.

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.

Which of the following statements about the EVPN data plane is FALSE?

• EVPN allows a service provider to deliver multiple services over a single core network.
• The customer data is encapsulated and then tunneled between the PE routers.
• EVPN-MPLS encapsulated data has a label that uniquely identifies each service.
• EVPN-MPLS provides services over a simple IP network.

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.

• 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.