Latest Success Metrics For Actual 4A0-115 Exam 2024 Realistic Dumps
Updated 4A0-115 Dumps Questions For Nokia Exam
Nokia 4A0-115 Exam Syllabus Topics:
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NEW QUESTION # 16
Based upon the exhibit, which of the following statements is FALSE?
- A. On PE3 and PE4, VPLS 10 must be configured with two different route-target values: one for VXLAN and another for MPLS.
- B. VPLS 10 must be configured with two BGP instances on PE3 and PE4.
- C. 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.
- D. On PE3 and PE4, VPLS 10 must be configured with two different route-distinguisher values: one for VXLAN and another for MPLS.
Answer: B
Explanation:
Explanation
VPLS 10 does not need to be configured with two BGP instances on PE3 and PE4. VPLS 10 can be configured with a single BGP instance that supports both VXLAN and MPLS encapsulations.
NEW QUESTION # 17
Proxy-ARP/ND is operational for a VPLS. Which of the following statements is FALSE?
- A. When the PE learns a local host IP address, it adds an entry into its proxy-ARP table.
- B. The proxy-ARP table is populated by snooping IP packets received from remote PEs.
- C. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.
- D. The PE has proxy-ARP and dynamic-populate enabled for the VPLS.
Answer: A
Explanation:
Explanation
When the PE learns a local host IP address, it does not add an entry into its proxy-ARP table. The proxy-ARP table is populated by snooping IP packets received from remote PEs. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.
NEW QUESTION # 18
Based on the exhibit below, which of the following statements is FALSE?
- A. When forwarding BUM traffic, the local PE uses an MPLS transport tunnel towards the advertising neighbor.
- B. When forwarding BUM traffic, the local PE must replicate the traffic and send it as unicast to the advertising neighbor.
- C. The MPLS label 524284 presented indicates the service label value that the neighbor 10.10.10.2 uses to forward BUM traffic to PEI.
- D. The IMET route is imported by a local VPLS configured with a route-target value of 65100:10.
Answer: B
Explanation:
Explanation
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.
NEW QUESTION # 19
Which of the following statements about multi-homing for a Layer-2 service is TRUE?
- A. In the single-active mode, the CE forwards traffic to all attached PES and receives traffic from a single PE.
- B. In the single-active mode, the CE requires a LAG to be configured between the CE and all attached PEs.
- C. In the all-active mode, all PES attached to a CE can forward traffic to and from the CE.
- D. The Nokia 7750 SR supports a CE being multi-homed to a maximum of two PEs.
Answer: C
Explanation:
Explanation
In the all-active mode, all PEs attached to a CE can forward traffic to and from the CE. This provides load balancing and redundancy for the CE. The CE does not require a LAG to be configured between the CE and all attached PEs1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 20
Which of the following statements about the EVPN route types used to support multi-homing is TRUE?
- A. A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.
- B. Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.
- C. Auto-discovery (A-D) routes are imported by all PES participating in the EVPN service.
- D. ES routes provide the ESI label required to support the split-horizon mechanism.
Answer: B
Explanation:
Explanation
Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment. The redundancy mode can be either single-active or all-active, and it determines how traffic is forwarded to and from a multi-homed CE1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 21
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?
- A. PE3
- B. PE2
- C. PE4
- D. PEI
Answer: B
Explanation:
Explanation
PE2 is elected as DF for VPLS 10. The default algorithm uses the lowest IP address of thePEs attached to the same Ethernet segment as the tie-breaker criterion. PE2 has the lowest IP address among PE1, PE2, and PE3.
NEW QUESTION # 22
The interface-ful numbered model is used for a Layer-3 EVPN service. Which of the following statements is FALSE?
- A. EVPN routes are advertised with a service label associated with the SBD VPLS.
- B. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts.
- C. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of SBD IRB interfaces.
- D. IP-Prefix routes exchanged between PES include a non-zero gateway IP address as an overlay index.
Answer: C
Explanation:
Explanation
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 References: Nokia Ethernet Virtual Private Network Services Course | Nokia
NEW QUESTION # 23
Examine the exhibit.
Which of the following statements about the EVPN routes exchanged for EVPN VPWS 2 is TRUE?
- A. PEI advertises an A-D per EVI route that includes a non-zero Layer-2 MTLJ.
- B. PE2 advertises an A-D per EVI route that includes a P flag set to I.
- C. PEI advertises an A-D per EVI route that includes a tag ID set to 40.
- D. All PES advertise a MAC route that includes a non-zero MPLS label.
Answer: D
Explanation:
Explanation
All PEs do not advertise a MAC route that includes a non-zero MPLS label. Only PE1 advertises a MAC route that includes a non-zero MPLS label, which is used by PE2 to forward traffic to PE1. PE2 and PE3 do not advertise any MAC routes for VPWS 21.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 24
Examine the exhibit.
Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?
- A. The local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.
- B. The remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.
- C. The local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.
- D. The local AC tag ID and the remote AC tag ID configured on PE2 must match.
Answer: C
Explanation:
Explanation
The local AC tag ID configured on PE2 must match the local AC tag ID configured on PE1. This ensures that the tag IDs are consistent across both ends of the VPWS service. The remote AC tag ID configured on PE2 does not need to match the remote AC tag ID configured on PE3, as long as they are unique within each PE1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 25
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?
- A. MAC-03
- B. MAC-OI
- C. MAC-04
- D. MAC-11
Answer: B
Explanation:
Explanation
MAC-01 is used as the source MAC address in the packets sent from PE1 when forwarding customer traffic to Host 2. MAC-01 is the MAC address of the SBD IRB interface configured in VPRN 11 on PE12.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
NEW QUESTION # 26
Which of the following statements about PE-to-PE MAC address advertisement is FALSE?
- A. A PE advertises locally-learned MAC addresses to remote PES using EVPN type-2 routes.
- B. Route targets are used to uniquely identify routes between EVIS in the case of MAC address overlaps.
- C. The service distinguisher (label or VNI) is advertised with the MAC/IP EVPN update.
- D. A PE uses a single MP-BGP session with a remote peer to exchange the routes for all EVIs.
Answer: B
Explanation:
Explanation
Route targets are not used to uniquely identify routes between EVIs in the case of MAC address overlaps.
Route targets are used to control the import and export of routes between different EVIs or VRFs. The service distinguisher (label or VNI) is used to uniquely identify each service1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 27
Which of the following statements about EVPN auto-discovery per Ethernet segment (A-D per ES) routes is TRUE?
- A. The updates include an Ethernet tag ID that is set to zero.
- B. The updates include an Ethernet segment identifier label that is used in loop prevention.
- C. The updates include an MPLS label that is set to a non-zero value.
- D. The updates advertise the Ethernet segment availability in a given EVPN service.
Answer: A
Explanation:
Explanation
EVPN auto-discovery per Ethernet segment (A-D per ES) routes do not include an Ethernet tag ID that is set to zero. The Ethernet tag ID is set to a non-zero value that identifies the EVPN service instance1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 28
Which of the following statements about the EVPN Layer 2 Attributes extended community is FALSE?
- A. It is advertised with the auto-discovery per EVPN instance (A-D per EVI) route.
- B. It specifies a P flag that indicates whether the advertising PE is a primary PE.
- C. It is applicable to EVPN VPLS services.
- D. It specifies the service maximum transmission unit (MTU).
Answer: C
Explanation:
Explanation
The EVPN Layer 2 Attributes extended community is not applicable to EVPN VPLS services. It is applicable to EVPN VPWS services, where it carries information such as the tag ID and the service MTU1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
NEW QUESTION # 29
A Layer-3 EVPN service is configured to use the interface-ful unnumbered forwarding model. Which of the following statements isFALSE?
- A. Each participating PE advertises a MAC/IP route that carries the MAC address of SBD IRB interface.
- B. The VPRN service is configured to allow the advertisement of IP prefixes.
- C. IP-Prefix routes exchanged between PES include a non-zero MAC address as an overlay index.
- D. The SBD IRB interface configured in the VPRN service has no IP address assigned to it.
Answer: D
Explanation:
Explanation
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 References: Nokia Ethernet Virtual Private Network Services Course | Nokia
NEW QUESTION # 30
Which of the following statements about an EVPN with integrated routing and bridging (EVPN-IRB) service is FALSE?
- A. This service enables the use of EVPN to provide connectivity between hosts in different subnets.
- B. In this service, the IRB interface acts as a default gateway for hosts in the corresponding subnet.
- C. This service requires the use of EVPN-MPLS for data plane.
- D. This service consists of a VPRN and multiple VPLSs.
Answer: C
Explanation:
Explanation
EVPN with integrated routing and bridging (EVPN-IRB) service does not require the use of EVPN-MPLS for data plane. EVPN-IRB service can use either EVPN-MPLS or EVPN-VXLAN for data plane.
NEW QUESTION # 31
Which of the following statements about EVPN auto-discovery per EVPN instance (A-D per EVI) routes is FALSE?
- A. A PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.
- B. A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.
- C. The updates include an Ethernet tag ID that is set to zero.
- D. The updates are used to discover all the PES associated with an Ethernet segment.
Answer: A
Explanation:
Explanation
A PE does not advertise an A-D per EVI route for each operational service defined on an Ethernet segment. A PE advertises a single A-D per EVI route for all services defined on an Ethernet segment.
NEW QUESTION # 32
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