ネットワーク環境で4A0-D03試験トレーニングガイドを使用すると、次回使用するときにインターネットに接続する必要がなくなり、4A0-D03試験トレーニングを自分で選択することができます。当社の4A0-D03試験トレーニングは機器を制限せず、ネットワークについて心配する必要はありません。これにより、4A0-D03テストガイドを使用したい限り、学習状態に入ることができます。そして、4A0-D03トレーニング資料は、4A0-D03試験に合格するための最良の試験資料であることがわかります。
| 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 3 EVPN Services | 25% | - VRF integration and route targets - EVPN Route Type 5 - Symmetric and asymmetric routing |
| Layer 2 EVPN Services | 25% | - EVPN Route Types 1–4 - Anycast Gateway and IRB - Multi-homing and Ethernet Segments |
| Data Center Interconnect (DCI) Solutions | 25% | - Interoperability with Nokia 7750 SR - BGP route policies and route reflectors - Gateway-less EVPN DCI |
3つのバージョンを含む4A0-D03試験問題の登場により、試験受験者の98％以上が証明書を正常に取得できました。それらは、PDFバージョン、ソフトウェアバージョン、およびAPPオンラインバージョンであり、顧客の要件と相互に関連しています。 4A0-D03試験資料のすべての内容は、実際の試験に基づいて特別に作成されています。また、4A0-D03シミュレーション問題は、高効率かつ高品質で慎重に配置されています。また、4A0-D03ガイドの準備は、思いやりのあるアフターサービスによって提供されます。
質問 # 17
Which of the following statements about the configuration of a Layer 3 multi-homing with a centralized router is FALSE?
正解：A
解説：
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.
質問 # 18
Which of the following statements does NOT describe the functionality or operation of the integrated gateway-based data center interconnect solution?
正解：A
解説：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In an integrated gateway-based DCI solution, the data center gateway and WAN PE functions reside on the same router. This device acts as the interworking point between the data center EVPN/VXLAN environment and the WAN transport service. It may need to translate or interwork between VXLAN encapsulation in the data center and MPLS or another WAN tunneling protocol in the WAN. For Layer 3 services, the integrated gateway may also re-advertise EVPN routes learned from the data center fabric into VPN-IPv4 or VPN-IPv6 routes for transport across the WAN. Option B does not describe the integrated gateway model. A border leaf using eBGP or static routes to interconnect with a gateway is a decoupled gateway-based design, where the data center border leaf and WAN PE/gateway are separate devices with a routing handoff between them. In the integrated model, that border-leaf-to-separate-gateway handoff is not the defining architecture because the gateway and WAN PE roles are combined on one router. Reference: integrated gateway DCI, VXLAN-to-WAN interworking, EVPN to VPN-IPv4/VPN-IPv6 re-advertisement, decoupled gateway distinction.
質問 # 19
A host is connected to multiple PEs through multi-homing.
Which of the following is NOT a function of the EVPN route-type 4 route?
正解：A
質問 # 20
Leaf routers are configured to support Layer 2 multi-homing all-active mode.
Which of the following statements is FALSE?
正解：C
解説：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
For Layer 2 all-active EVPN multi-homing on SR Linux, the Ethernet Segment configuration is the control-plane anchor that binds the redundant access attachment to EVPN. The relevant LAG subinterfaces must be associated with the Ethernet Segment so that the PE can advertise the segment correctly and apply split-horizon and aliasing behavior. The Ethernet Segment must also be administratively enabled; otherwise, the PE will not participate properly in ES discovery and DF procedures. The multi-homing mode must be set to all-active to permit forwarding through multiple attached leaf routers and support host-side LAG operation. The false statement is option B. The Ethernet Segment Identifier has a defined structure, and the blanket statement that the 2nd through 7th octets "must not be all zeros" is not a valid requirement as stated. What matters operationally is that the ESI uniquely identifies the same multi-homed Ethernet Segment across participating PEs and is consistently configured where required. The ESI must be non-zero as a meaningful segment identifier, but the specific octet restriction in the option is not the SR Linux all-active configuration rule. Reference: SR Linux L2 EVPN all-active multi-homing, Ethernet Segment configuration, LAG association.
質問 # 21
e-BGP is used as the routing protocol in the data center underlay.
When configuring the EVPN MP-BGP route reflector sessions, which of the following statements is FALSE?
正解：B
解説：
Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:
In many SR Linux data center fabrics, eBGP is used in the underlay because it gives simple hop-by-hop routing, fast convergence, and clean autonomous-system separation between leaf and spine nodes. The EVPN overlay, however, is a separate MP-BGP control plane used to distribute EVPN NLRI. The overlay route-reflector session does not have to reuse the leaf's underlay autonomous system number. In practice, an overlay BGP group may use a distinct local AS or configuration model separate from the underlay AS design. Therefore, option B is false. The route reflector's cluster ID is configured on the route reflector itself to prevent reflection loops and identify the RR cluster. Redundant route reflectors can be deployed for resiliency, and clients may receive duplicate paths or duplicate updates from multiple RRs; the BGP decision process and route reflection rules handle this. The key design distinction is that underlay eBGP provides IP reachability between loopbacks, while overlay MP-BGP EVPN carries tenant service reachability. Mixing these roles leads to incorrect AS planning. Reference: SR Linux EVPN MP-BGP route reflectors, eBGP underlay, overlay BGP sessions.
質問 # 22
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