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Juniper JN0-683関連試験 & JN0-683認証試験

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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

データセンターのマルチテナントとセキュリティ: このセクションでは、シングルテナントおよびマルチテナントデータセンターの設定に関する知識がテストされます。データセンタープロフェッショナルなどの候補者は、共有インフラストラクチャ環境におけるレイヤー 2 レベルとレイヤー 3 レベルの両方でテナントトラフィックの分離を確実に行えるかどうかが評価されます。

トピック 2

データセンター相互接続: データセンターエンジニア向けのこのパートでは、データセンターの相互接続、レイヤー 2 およびレイヤー 3 のストレッチ、ファブリックのステッチ、EVPN シグナル VXLAN を使用したデータセンター間のシームレスな通信について説明します。

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。

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Juniper Data Center, Professional (JNCIP-DC) 認定 JN0-683 試験問題 (Q22-Q27):

質問 # 22
You are selling up an EVPN-VXLAN architecture (or your new data center. thisinitial deployment will be less than 50 switches: however, it could scale up to 250 switches over time supporting 1024 VLANs. You are still deciding whether to use symmetric or asymmetric routing.
In this scenario, which two statements are correct? (Choose two.)

A. Symmetric routing supports higher scaling numbers.
B. Asymmetric routing is easier lo monitor because of the transit VNI.
C. Asymmetric routing routes traffic on the egress switch.
D. Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance.

正解：A、C

解説：
* Symmetric vs. Asymmetric Routing in EVPN-VXLAN:
* Symmetric Routing:Traffic enters and exits the VXLAN network through the same VTEP, regardless of the source or destination. This approach simplifies routing decisions, especially in large networks, and is generally more scalable.
* Asymmetric Routing:The routing occurs on the egress VTEP. This method can be simpler to deploy in smaller environments but becomes complex as the network scales, particularly with larger numbers of VNIs and VLANs.
* Correct Statements:
* C. Symmetric routing supports higher scaling numbers:Symmetric routing is preferred in larger EVPN-VXLAN deployments because it centralizes routing decisions, which can be more easily managed and scaled.
* D. Asymmetric routing routes traffic on the egress switch:This is accurate, as asymmetric routing means the routing decision is made at the final hop, i.e., the egress VTEP before the traffic reaches its destination.
* Incorrect Statements:
* A. Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance:This is not accurate. Symmetric routing does not require an extra VLAN per VRF; rather, it uses the same VLAN/VNI across the network, simplifying routing and VLAN management.
* B. Asymmetric routing is easier to monitor because of the transit VNI:Asymmetric routing is not necessarily easier to monitor; in fact, it can add complexity due to the split routing logic between ingress and egress points.
Data Center References:
* The choice between symmetric and asymmetric routing in an EVPN-VXLAN environment depends on network size, complexity, and specific operational requirements. Symmetric routing is generally more scalable and easier to manage in large-scale deployments.

質問 # 23
You want to convert an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway for VNI 100. You have already configured an IRB interface. In this scenario, which command would you use to accomplish this task?

A. set protocols ospf area 0.0.0.0 interface irb.100 passive
B. set protocols isis interface irb.100 passive
C. set vlans VLAN-100 13-interface irb.100
D. set bridge-domains VLAN-100 routing-interface irb.100

正解：D

解説：
* Scenario Overview:
* Converting an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway involves transitioning the router's functionality from simply bridging traffic within a VXLAN segment to routing traffic between different segments.
* Key Configuration Requirement:
* IRB (Integrated Routing and Bridging) Interface:An IRB interface allows for both Layer 2 switching and Layer 3 routing. To enable routing for a specific VNI (VXLAN Network Identifier), the IRB interface must be associated with the routing function in the corresponding bridge domain.
* Correct Command:
* C. set bridge-domains VLAN-100 routing-interface irb.100:This command correctly binds the IRB interface to the bridge domain, enabling Layer 3 routing functionality within the VXLAN for VNI 100. This effectively transitions the device from operating solely as a Layer 2 gateway to a Layer 3 gateway.
Data Center References:
* This configuration step is essential when converting a Layer 2 VXLAN gateway to a Layer 3 gateway, enabling the MX Series router to route between VXLAN segments.

質問 # 24
Exhibit.

Referring to the exhibit, Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) in a data center that uses an ERB architecture. What do you determine from the output?

A. The traffic is entering the VXLAN tunnel.
B. The traffic is failing because load balancing is not configured correctly.
C. Host1 and Host2 are directly connected to leaf1.
D. The irb.20 interface is not configured on leaf1.

正解：A

解説：
Understanding the Problem:
* Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) within an EVPN-VXLAN environment using ERB architecture.
Analysis of the Exhibit:
* The provided output includes information from the show route forwarding-table matching command for IP 10.1.2.1. The next hop is shown as vtep.32769, which indicates that the traffic destined for 10.1.2.1 is being forwarded into the VXLAN tunnel with the correct VTEP (VXLAN Tunnel Endpoint).
Conclusion:
* Option B:Correct-The traffic from Host1 is entering the VXLAN tunnel, as evidenced by the next hop pointing to a VTEP. However, the issue could lie elsewhere, possibly with the remote VTEP, routing configurations, or the receiving leaf/spine devices.

質問 # 25
Exhibit.

You have a sample configuration for connecting two sites through EVPN-VXLAN by exchanging IP prefix routes.
Referring to the exhibit, which two statements regarding the configuration are true? {Choose two.)

A. The advertise direct-nexthop option enables the receiver to resolve the next-hop route using only information carried in the Type 2 route.
B. The advertise direct-nexthop option enables the receiver to resolve the next-hop route using only information carried in the Type 5 route.
C. The VNI must match on all devices for the same customer.
D. The VNI should be unique on all devices for each customer site.

正解：B、C

解説：
EVPN-VXLAN Configuration:
* The configuration provided in the exhibit shows an EVPN-VXLAN setup where IP prefix routes are exchanged between two sites. The advertise direct-nexthop option and the VNI (Virtual Network Identifier) settings are crucial in this context.
Advertise Direct-Nexthop:
* Option A:The advertise direct-nexthop option ensures that the next-hop route is resolved using only the information carried in the EVPN Type 5 route. Type 5 routes are used for IP prefix advertisement in EVPN, which is key to enabling Layer 3 interconnectivity between different VXLAN segments.
VNI Consistency:
* Option C:For the same customer across different devices, the VNI must be consistent. This consistency ensures that all devices can correctly map traffic to the appropriate VXLAN segment, maintaining seamless Layer 2 and Layer 3 connectivity.

質問 # 26
Which parameter is used to associate a received route with a local VPN route table?

A. route-distinguisher
B. route-target community
C. VNI
D. VLAN ID

正解：B

解説：
* Understanding VPN Route Table Association:
* In MPLS/VPN and EVPN networks, theroute-target communityis a BGP extended community attribute used to control the import and export of VPN routes. It associates received routes with the appropriate VPN route tables on the PE (Provider Edge) routers.
* Function of Route-Target Community:
* The route-target community tag ensures that routes are imported into the correct VRF (Virtual Routing and Forwarding) instance, allowing them to be correctly routed within the VPN.
Conclusion:
* Option A:Correct-The route-target community is used to associate received routes with a local VPN route table.

質問 # 27
......

我々はJN0-683試験を準備しているあなたに便利をもたらすために、PDF版、ソフト版、オンライン版の3つの異なるバーションを提供しています。PDF版のJN0-683問題集を利用したら、紙でプリントすることができて読みやすいです。ソフト版であなたは試験の環境でJN0-683模擬試験をすることができて複数のパソコンで使用することができます。また、オンライン版を通して、どの電子製品でも使うことができて、オンライン版の機能はソフト版のと大体同じです。

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BONUS！！！ ShikenPASS JN0-683ダンプの一部を無料でダウンロード：https://drive.google.com/open?id=1K9lWDppPGmO5wOUyQyiuxmb9dTT5M8sd

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