JN0-683学習資料、JN0-683専門試験

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Juniper JN0-683 認定試験の出題範囲：

トピック	出題範囲
トピック 1	レイヤー 3 ファブリック: このセクションでは、データセンターで IP ベースのネットワークを管理する専門家の知識を測定します。IP ファブリックのアーキテクチャとルーティングをカバーし、候補者がネットワークがスケーラビリティのためにどのように構成されているか、トラフィックが効率的にルーティングされる方法を理解できるようにします。
トピック 2	データセンターの展開と管理: このセクションでは、主要な展開コンセプトに焦点を当てて、アーキテクトやエンジニアなどのデータセンターネットワークプロフェッショナルの専門知識を評価します。トピックには、手動入力なしでデータセンターのデバイスセットアップを自動化するゼロタッチプロビジョニング (ZTP) が含まれます。
トピック 3	VXLAN: この部分では、VXLAN に関する知識、特にデータプレーンがトラフィックフローを処理する一方でコントロールプレーンがデバイス間の通信を管理する方法についての知識が必要です。VXLAN を構成、監視、またはトラブルシューティングする方法に関する知識を示します。

>> JN0-683学習資料 <<

JN0-683専門試験 & JN0-683試験対策書

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Juniper Data Center, Professional (JNCIP-DC) 認定 JN0-683 試験問題 (Q39-Q44):

質問 # 39
You are using E8GP peering in an underlay IP fabric. Which two statements are correct in this scenario?
(Choose two.)

A. EBGP peering does not require an IGP protocol tor adjacency establishment.
B. Every leaf node has a peering session to every other leaf node.
C. EBGP peering requires an IGP protocol tor adjacency establishment.
D. Every leaf node has one peering session to every spine node.

正解：A、D

解説：
* Understanding EBGP in an IP Fabric:
* EBGP (External Border Gateway Protocol) is commonly used in IP fabrics to establish peering between routers, such as leaf and spine nodes, without relying on an Interior Gateway Protocol (IGP) like OSPF or IS-IS.
* IGP Requirement for EBGP:
* Option B:EBGP peering does not require an IGP for adjacency establishment. This is because EBGP peers are typically directly connected, and BGP establishes its own sessions without needing an underlying IGP.
* Leaf-to-Spine Peering:
* Option C:In a typical IP fabric, each leaf node establishes an EBGP session with every spine node. This ensures full connectivity between leaves and spines, facilitating efficient routing and forwarding within the fabric.
Conclusion:
* Option B:Correct-EBGP does not require an IGP for establishing peering sessions.
* Option C:Correct-Each leaf node peers with every spine node, which is a standard practice in IP fabrics to ensure connectivity and redundancy.

質問 # 40
Exhibit.

Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.
Referring to the exhibit, which two configuration changes are required to solve the problem? (Choose two.)

A. Configure the setswitch-options vtep-source-interface100. 0 parameter on Leaf-1.
B. Configure the set switch-options vrf-target target: 65000:55 parameter on Leaf-2.
C. Configure the set switch-options service-id 1 parameter on Leaf-2.
D. Configure the setswitch-options route-distinguisher 192.168.100.51:2 parameter on Leaf-1.

正解：B、C

解説：
* Review of the Exhibit:
* The exhibit shows the switch configuration for Leaf-1 and Leaf-2. The configurations include route distinguishers, VRF targets, and service IDs, all of which are crucial for ensuring proper operation in an EVPN-VXLAN environment.
* Service-ID Consistency:
* The service ID must be consistent across all participating leaf devices in the same EVPN instance to ensure that they are part of the same VXLAN overlay network.
* VRF Target Consistency:
* The vrf-target parameter must also be consistent across devices to ensure that VRFs (Virtual Routing and Forwarding instances) are correctly imported and exported between leaf nodes.
Conclusion:
* Option B:Correct-Setting the same service-id on Leaf-2 ensures that it is part of the same VXLAN overlay as Leaf-1.
* Option D:Correct-The vrf-target on Leaf-2 should match Leaf-1 to ensure consistent routing policies and proper route exchange.

質問 # 41
In your EVPN-VXAN environment, you want to prevent a multihomed server from receiving multiple copies ofBUM traffic in active/active scenarios. Which EVPN route type would satisfy this requirement?

A. Type 4
B. Type 8
C. Type 5
D. Type 7

正解：A

解説：
* Understanding the Scenario:
* In an EVPN-VXLAN environment, when using multi-homing in active/active scenarios, there's a risk that a multihomed server might receive duplicate copies of Broadcast, Unknown unicast, and Multicast (BUM) traffic. This is because multiple VTEPs might forward the same BUM traffic to the server.
* EVPN Route Types:
* Type 4 Route (Ethernet Segment Route):This route type is used to advertise the Ethernet Segment (ES) to which the device is connected. It is specifically used in multi-homing scenarios to signal the ES and its associated Ethernet Tag to all the remote VTEPs. The Type 4 route includes information that helps prevent BUM traffic duplication in active/active multi-homing by using a split-horizon mechanism, which ensures that traffic sent to a multihomed device does not get looped back.
* Explanation:
* The Type 4 route is crucial for ensuring that in a multi-homed setup, particularly in an active
/active configuration, BUM traffic does not result in duplication at the server. The route helps coordinate which VTEP is responsible for forwarding the BUM traffic to the server, thereby preventing duplicate traffic.
Data Center References:
* Type 4 routes are essential for managing multi-homing in EVPN to avoid the issues of BUM traffic duplication, which could otherwise lead to inefficiencies and potential network issues.

質問 # 42
You are deploying an IP fabric using EBGP and notice that your leaf devices areadvertising and receiving all the routes. However, the routes are not installed in the routing table and are marked as hidden.
Which two statements describe how to solve the issue? (Choose two.)

A. You need to configure a next-hop self policy.
B. You need to configure loops 2.
C. You need to configure multipath multiple-as.
D. You need to configure as-override.

正解：A、C

質問 # 43
You are deploying an EVPN-VXLAN overlay. You must ensure that Layer 3 routing happens on the spine devices. In this scenario, which deployment architecture should you use?

A. distributed symmetric routing
B. bridged overlay
C. ERB
D. CRB

正解：D

解説：
* Understanding EVPN-VXLAN Architectures:
* EVPN-VXLAN overlays allow for scalable Layer 2 and Layer 3 services in modern data centers.
* CRB (Centralized Routing and Bridging):In this architecture, the Layer 3 routing is centralized on spine devices, while the leaf devices focus on Layer 2 switching and VXLAN tunneling. This setup is optimal when the goal is to centralize routing for ease of management and to avoid complex routing at the leaf level.
* ERB (Edge Routing and Bridging):This architecture places routing functions on the leaf devices, making it a distributed model where each leaf handles routing for its connected hosts.
* Architecture Choice for Spine Routing:
* Given the requirement to ensure Layer 3 routing happens on the spine devices, theCRB (Centralized Routing and Bridging)architecture is the correct choice. This configuration offloads routing tasks to the spine, centralizing control and potentially simplifying the overall design.
* Explanation:
* With CRB, the spine devices perform all routing between VXLAN segments. Leaf switches handle local switching and VXLAN encapsulation, but routing decisions are centralized at the spine level.
* This model is particularly advantageous in scenarios where centralized management and routing control are desired, reducing the complexity and configuration burden on the leaf switches.
Data Center References:
* The CRB architecture is commonly used in data centers where centralized control and simplified management are key design considerations. It allows the spines to act as the primary routing engines, ensuring that routing is handled in a consistent and scalable manner across the fabric.

質問 # 44
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