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

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

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.

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

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

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.

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

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

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.

Based upon the exhibit, which of the following statements about the forwarding of BUM traffic is FALSE?

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

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.

In the exhibit, MACI moves from PEI to PE2. Which of the following actions related to this MAC address mobility is performed?

PE2 advertises a MAC/IP route for MACI with a sequence number higher than that received from PEI.

CEI generates an update message to PEI withdrawing its MAC.

PEI generates an update message to remote PES identifying the new location of CEI.

PE2 advertises a MAC/IP route for MACI with a sequence number higher than that received from PEI.

PE3 waits to receive a data packet from CEI to update its FDB entry for MACI.

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

To discover all PES participating in the same VPIS service

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

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.

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

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

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

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

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

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.

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

PEI uses VXLAN tunnels to reach neighbors 10.10.10.2 and 10.10.10.3.

PEI populates this information into the local VPLS FDB.

Neighbors 10.10.10.2 and 10.10.10.3 have proxy-ARP enabled for the VPLS.

Neighbors 10.10.10.2 and 10.10.10.3 have a service that uses a network identifier of 10.

PEI uses VXLAN tunnels to reach neighbors 10.10.10.2 and 10.10.10.3.

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

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

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.

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.

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.

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.

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

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.

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

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

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.

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

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

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?

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

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 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 about EVPN auto-discovery per Ethernet segment (A-D per ES) routes is TRUE?

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

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.

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

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

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.

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

Examine the exhibit.Which of the following actions is performed by PEI after it receives a BUM packet from CEI?

PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.

PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.

PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.

PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.

PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.

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

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

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.

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

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

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

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

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.

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

It is applicable to EVPN VPLS services.

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.

Which of the following statements about the operation of a single-homed EVPN VPWS is TRUE?

The advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.

The same tag ID must be configured for the local attachment circuit (AC) at each PE.

Each PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.

The advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.

Each PE verifies that the received tag ID matches its configured local AC tag ID.

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

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

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.

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

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

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.

Examine the exhibit. Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?

The local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.

The remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.

The local AC tag ID and the remote AC tag ID configured on PE2 must match.

The local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.

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

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.

Examine the exhibit. Which of the following configuration is NOT required to enable Layer-2 communication between CEI and CE2?

Configure a service distribution point (SDP) on PE3 to reach PE4, and another SDP on PE4 to reach PE3.

Configure an MP-BGP session that allows the exchange of EVPN routes between PEI and PE3.

Configure an MP-BGP session that allows the exchange of IPv4 labeled routes between PE3 and PE4.

Configure a service distribution point (SDP) on PE3 to reach PE4, and another SDP on PE4 to reach PE3.

Configure a local attachment circuit (AC) and a remote AC for VPWS 4 on all PE routers.

Examine the exhibit. Which of the following statements about the operation of VPLS 20 is TRUE?

PEI advertises a MAC route for MAC-OI when its VPLS 2(Ys SAP becomes operationally UP.

The flooding list maintained by PEI for VPLS 20 contains three entries: PE2, PE3, and PE4.

PE3 advertises an IMET route to PEI when its VPLS 20's mesh-SDP becomes operationally UP.

PE3 signals a service label to PE4 when its VPLS 20 is enabled and is bound to an operational SDP.

PEI advertises a MAC route for MAC-OI when its VPLS 2(Ys SAP becomes operationally UP.

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?

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.

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.

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

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.

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 PE

Nokia 4A0-115 Practice Test 1 - Free Online Exam Prep & Questions

Question 1 / 40

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.

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