全面的4A0-D03考試資料，最新的考試題庫幫助妳輕松通過4A0-D03考試

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4A0-D03考試資料, 4A0-D03參考資料, 4A0-D03試題, 4A0-D03證照考試, 4A0-D03最新考古題

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Nokia 4A0-D03 Exam Syllabus Topics:

Section Weight Objectives
SR Linux and EVPN Fundamentals 25% - SR Linux architecture and CLI
- EVPN control plane and MP-BGP
- VXLAN encapsulation and underlay
Layer 2 EVPN Services 25% - EVPN Route Types 1–4
- Anycast Gateway and IRB
- Multi-homing and Ethernet Segments
Layer 3 EVPN Services 25% - EVPN Route Type 5
- Symmetric and asymmetric routing
- VRF integration and route targets
Data Center Interconnect (DCI) Solutions 25% - Interoperability with Nokia 7750 SR
- Gateway-less EVPN DCI
- BGP route policies and route reflectors

>> 4A0-D03考試資料 <<

4A0-D03參考資料，4A0-D03試題

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最新的 Nokia Certified Data Center Fabric Professional 4A0-D03 免費考試真題 (Q24-Q29):

問題 #24
Which of the following statements about the configuration of a Layer 3 multi-homing with a centralized router is FALSE?

  • A. The centralized router will advertise the customer prefixes using an EVPN route-type 5 update.
  • B. The centralized router must be a member of the Ethernet segment.
  • C. All routers participating in the Ethernet segment must have the multi-homing mode set to all-active.
  • D. Remote leaf routers can load balance traffic to customer prefixes through the leaf routers connected to the Ethernet segment.

答案：C

解題說明：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
Layer 3 EVPN multi-homing with a centralized router uses an Ethernet Segment to associate multiple leaf routers with a common external L3 attachment. The centralized router is part of that attached segment from the forwarding perspective, and the connected leaf routers advertise third-party or customer prefixes into EVPN so that remote leaves can reach those prefixes through the multi-homed attachment. For L3 EVPN, learned customer prefixes are normally advertised using EVPN route type 5, which carries IP prefix reachability. In an all-active design, remote leaf routers may load balance traffic to the customer prefix through multiple attached leaf routers because the ES next-hop allows the remote PE to understand that the prefix is reachable through a multi-homed Ethernet Segment. The false statement is that every router participating in the Ethernet Segment must be configured with all-active mode. Multi-homing mode is a design and configuration property of the EVPN PEs participating in the ES, and designs may use single-active or all-active behavior depending on redundancy and forwarding requirements. Reference: L3 EVPN multi-homing, centralized router attachment, EVPN RT-5 prefix advertisement.


問題 #25
Consider the exhibit.

Which of the following statements is FALSE?

  • A. The MAC address associated to the vxlan-interface will not age out.
  • B. The remote host's IP address is 100.0.2.3.
  • C. The MAC address 00:00:00:00:00:01 was learned through the data plane.
  • D. The VXLAN network identifier configured for this MAC-VRF is 100.

答案：A

解題說明：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In an SR Linux Layer 2 EVPN MAC-VRF, locally attached MAC addresses are learned through the data plane on local access interfaces, while remote MAC addresses are learned from MP-BGP EVPN control-plane advertisements and installed with a VXLAN next-hop. The exhibit shows one local learned MAC on an Ethernet subinterface and another MAC learned through EVPN with a VXLAN interface and VNI 100. The remote VTEP or next-hop information identifies the remote endpoint, and the VNI maps the received VXLAN traffic to the correct MAC-VRF service. The false statement is C because saying that the MAC address associated with the vxlan-interface "will not age out" is too absolute. A remote EVPN MAC is not aged in the same way as a local data-plane-learned MAC, but it can still be removed when the corresponding EVPN route is withdrawn, invalidated, or no longer present in the control plane. The "N/A" style aging behavior does not mean permanent retention. Reference: SR Linux MAC-VRF verification, local MAC learning, EVPN-learned remote MACs, VXLAN VNI mapping.


問題 #26
Which of the following statements about configuring and using an integrated routing and bridging (IRB) interface is TRUE?

  • A. The IRB sub-interface must be configured as either type bridge or routed.
  • B. When the IRB sub-interface is configured with multiple IP addresses, one of them can be configured as the primary.
  • C. A MAC-VRF can be configured with multiple IRB sub-interfaces to support multi-homing.
  • D. When using an IRB interface to interconnect a MAC-VRF to an IP-VRF, one sub-interface is configured for the MAC-VRF and another one for the IP-VRF.

答案：B

解題說明：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
An IRB interface is the logical connection point between a Layer 2 MAC-VRF and a Layer 3 IP-VRF. It provides the routed gateway function for hosts in the bridge domain while allowing traffic to move into the routed VRF for inter-subnet forwarding. The correct statement is that when an IRB sub-interface has multiple IP addresses, one can be designated as the primary. This is important because the primary address is used for normal gateway or subnet behavior when more than one address is present on the same routed interface context. Option A is inaccurate because the question is about an IRB sub-interface, not a generic subinterface selection between bridge or routed access modes. Option B is not the defining multi-homing model; EVPN multi-homing is implemented through Ethernet Segment association and MAC-VRF attachment behavior, not by adding multiple IRB subinterfaces for multi-homing. Option D is also wrong because the IRB is the shared logical link between the MAC-VRF and IP-VRF; the design does not require separate IRB subinterfaces on each side as independent constructs. Reference: SR Linux IRB configuration, MAC-VRF to IP-VRF interconnection, primary IP addressing.


問題 #27
Which of the following statements about the decoupled gateway-based data center interconnect solution is FALSE?

  • A. VLAN tags are used to identify traffic between the data center border leaf and the WAN PE.
  • B. The separation between the border leaf and the WAN PE provides a clear demarcation for security and QoS.
  • C. The WAN PE maintains a peering session with the data center route-reflector for the exchange of updates.
  • D. The EVPN services in the data center are interconnected to different VPN services in the WAN.

答案：C

解題說明：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In a decoupled gateway-based DCI design, the data center border leaf and the WAN PE are separate devices. Traffic between them can be identified using VLAN tags, allowing different data center EVPN services to be mapped to corresponding WAN VPN services. This architecture provides a clean operational boundary: the border leaf remains aligned with the data center EVPN/VXLAN fabric, while the WAN PE handles WAN VPN transport, QoS, security policy, and service interconnection. The separation gives a strong demarcation point for troubleshooting and administrative control. Option D is false because the WAN PE does not maintain an MP-BGP EVPN peering session with the data center route reflector. In the decoupled model, the route reflector remains part of the data center EVPN control plane, while the WAN PE exchanges routing or service information with the border leaf through the local handoff model. Direct WAN PE-to-data-center-RR peering would blur the separation that defines the decoupled design and would make the WAN PE part of the data center EVPN overlay control plane, which is not the intended architecture. Reference: decoupled gateway DCI, VLAN handoff, WAN VPN mapping, security/QoS demarcation, route-reflector separation.


問題 #28
Consider the exhibit.

All IP-VRFs are configured properly and are operational.
Which of the following statements is FALSE?

  • A. One of the connected leaf routers will be elected DF.
  • B. All connected leaf routers will use an AD per ES update to advertise single-active redundancy.
  • C. Only the elected DF will advertise the customer IP prefix route to the BGP route reflector.
  • D. The elected DF will use the AD per EVI update to identify itself as primary.

答案：D

解題說明：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In a single-active EVPN multi-homing design, the connected PE routers perform Designated Forwarder election to determine which PE is active for the relevant service or Ethernet Segment. The DF is responsible for forwarding toward the attached segment and, in a Layer 3 multi-homing case, only the active/DF PE advertises the customer IP prefix route toward the EVPN control plane. Single-active redundancy is communicated using Ethernet Segment-related EVPN procedures, including Ethernet A-D information, so remote PEs can identify the redundancy behavior and avoid forwarding traffic to an inactive attachment. The false statement is that the elected DF uses an AD per EVI update to identify itself as primary. AD per EVI is primarily used to advertise per-service Ethernet Segment reachability and support aliasing/load-balancing behavior in multi-homed services. DF election itself is driven by Ethernet Segment route procedures, not by the DF declaring itself primary through AD per EVI. Therefore, option B misstates the role of AD per EVI in the single-active L3 multi-homing control plane. Reference: EVPN DF election, single-active multi-homing, Ethernet A-D routes.


問題 #29
......

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4A0-D03參考資料: https://www.testpdf.net/4A0-D03.html

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