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Juniper JN0-683日本語解説集 & JN0-683科目対策

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素敵なJN0-683日本語解説集試験-試験の準備方法-100％合格率のJN0-683科目対策

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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

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。

トピック 3

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 4

EVPN-VXLAN シグナリング: このセクションでは、ルートタイプ、マルチキャスト処理、マルチプロトコル BGP (MBGP) などのイーサネット VPN (EVPN) の概念に関する理解を評価します。また、CRB や ERB、MAC 学習、対称ルーティングなどの EVPN アーキテクチャについても説明します。

Juniper Data Center, Professional (JNCIP-DC) 認定 JN0-683 試験問題 (Q61-Q66):

質問 # 61
Which two statements are true about EVPN routes for Data Center Interconnect? (Choose two.)

A. Type 2 EVPN routes require a VXLAN tunnel to the protocol next hop.
B. Type 2 EVPN routes do not require a VXLAN tunnel to the protocol next hop.
C. Type 5 EVPN routes do not require a VXLAN tunnel to the protocol next hop.
D. Type 5 EVPN routes require a VXLAN tunnel to the protocol next hop.

正解：B、C

解説：
* Type 2 EVPN Routes:
* Type 2 routesadvertise MAC addresses within an EVPN instance and are used primarily for Layer 2 bridging. These routes do not require a VXLAN tunnel to the protocol next hop because they operate within the same Layer 2 domain.
* Type 5 EVPN Routes:
* Type 5 routesare used to advertise IP prefixes (Layer 3 routes) within EVPN. Similar to Type 2 routes, they do not require a VXLAN tunnel to the protocol next hop because they represent L3 routes, which are managed at the routing layer without the need for VXLAN encapsulation.
Conclusion:
* Option B:Correct-Type 2 routes do not need a VXLAN tunnel to the next hop, as they are used for Layer 2.
* Option D:Correct-Type 5 routes also do not need a VXLAN tunnel because they operate at Layer 3, handling IP prefixes.

質問 # 62
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 multipath multiple-as.
B. You need to configure loops 2.
C. You need to configure as-override.
D. You need to configure a next-hop self policy.

正解：A、D

解説：
* Issue Overview:
* The leaf devices in an IP fabric using eBGP are advertising and receiving all routes, but the routes are not being installed in the routing table and are marked as hidden. Thistypically indicates an issue with the BGP configuration, particularly with next-hop handling or AS path concerns.
* Corrective Actions:
* B. You need to configure a next-hop self policy:This action ensures that the leaf devices modify the next-hop attribute to their own IP address before advertising routes to their peers. This is particularly important in eBGP setups where the next-hop may not be directly reachable by other peers.
* D. You need to configure multipath multiple-as:This setting allows the router to accept multiple paths from different autonomous systems (ASes) and use them for load balancing.
Without this, the BGP process might consider only one path and mark others as hidden.
* Incorrect Statements:
* A. You need to configure as-override:AS-override is used to replace the AS number in the AS- path attribute to prevent loop detection issues in MPLS VPNs, not in a typical eBGP IP fabric setup.
* C. You need to configure loops 2:There is no specific BGP command loops 2 relevant to resolving hidden routes in this context. It might be confused with allowas-in, which is used to allow AS path loops under certain conditions.
Data Center References:
* Proper BGP configuration is crucial in IP fabrics to ensure route propagation and to prevent routes from being marked as hidden. Configuration parameters like next-hop self and multipath multiple-as are common solutions to ensure optimal route installation and load balancing in a multi-vendor environment.

質問 # 63
You are implementing VXLAN broadcast domains in your data center environment. Which two statements are correct in this scenario? (Choose two.)

A. A VXLAN packet does not contain a VLAN ID.
B. Layer 2 frames are encapsulated by the source VTEP.
C. The VNI is a 16-bit value and can range from 0 through 16.777.215.
D. The VNI must match the VLAN tag to ensure that the remote VTEP can decapsulate VXLAN packets.

正解：A、B

解説：
* VXLAN Overview:
* VXLAN (Virtual Extensible LAN) is a network virtualization technology that encapsulates Layer
2 Ethernet frames into Layer 3 UDP packets for transmission over an IP network. It allows the creation of Layer 2 overlay networks across a Layer 3 infrastructure.
* Understanding VXLAN Components:
* VTEP (VXLAN Tunnel Endpoint):A VTEP is responsible for encapsulating and decapsulating Ethernet frames into and from VXLAN packets.
* VNI (VXLAN Network Identifier):A 24-bit identifier used to distinguish different VXLAN segments, allowing for up to 16 million unique segments.
* Correct Statements:
* C. Layer 2 frames are encapsulated by the source VTEP:This is correct. In a VXLAN deployment, the source VTEP encapsulates the original Layer 2 Ethernet frame into a VXLAN packet before transmitting it over the IP network to the destination VTEP, which then decapsulates it.
* A. A VXLAN packet does not contain a VLAN ID:This is correct. The VXLAN header does not carry the original VLAN ID; instead, it uses the VNI to identify the network segment. The VLAN ID is local to the switch and does not traverse the VXLAN tunnel.
* Incorrect Statements:
* B. The VNI must match the VLAN tag to ensure that the remote VTEP can decapsulate VXLAN packets:This is incorrect. The VNI is independent of the VLAN tag, and the VLAN ID does not need to match the VNI. The VNI is what the remote VTEP uses to identify the correct VXLAN segment.
* D. The VNI is a 16-bit value and can range from 0 through 16,777,215:This is incorrect because the VNI is a 24-bit value, allowing for a range of 0 to 16,777,215.
Data Center References:
* VXLAN technology is critical for modern data centers as it enables scalability and efficient segmentation without the constraints of traditional VLAN limits.

質問 # 64
Exhibit.

Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.

A. Configure the setswitch-options vtep-source-interface irb.0parameter on Leaf-1.
B. Configure the setswitch-options route-distinguisher i92.168.100.50:i parameter on Leaf-1.
C. Configure the set switch-options vrf-target target:65000:l parameteron Leaf-2.
D. Referring to the exhibit, which two configuration changes are required to solve the problem? (Choose two.)
E. Configure the setswitch-options service-id 1 parameter on Leaf-2.

正解：C、E

解説：
* Issue Analysis:
* The problem in the exhibit suggests a mismatch in configuration parameters between Leaf-1 and Leaf-2, leading to communication issues between hosts connected to these leaf devices.
* Configuration Mismatches:
* Service-ID:Leaf-1 has service-id 1 configured, while Leaf-2 does not have this parameter. For consistency and proper operation, the service-id should be the same across both leaf devices.
* VRF Target:Leaf-1 is configured with vrf-target target:65000:1, while Leaf-2 is configured with vrf-target target:65000:2. To allow proper VRF import/export between the two leafs, these should match.
* Corrective Actions:
* C. Configure the set switch-options vrf-target target:65000:1 parameter on Leaf-2:This aligns the VRF targets between the two leaf devices, ensuring they can correctly import and export routes.
* E. Configure the set switch-options service-id 1 parameter on Leaf-2:This ensures that both Leaf-1 and Leaf-2 use the same service ID, which is necessary for consistency in the EVPN- VXLAN setup.
Data Center References:
* Correct configuration of VRF targets and service IDs is critical in EVPN-VXLAN setups to ensure that routes and services are correctly shared and recognized between different devices in the network fabric.

質問 # 65
You are preparing an sFlow monitoring system configuration.
In this scenario, what Information will be included in the datagram sent to the sFlow collector? (Choose two.)

A. the interlace through which the packets entered the agent
B. the source and destination VLAN for sampled packets
C. the CRC from the sampled packet
D. the sending device's serial number

正解：A、B

解説：
* Understanding sFlow Monitoring:
* sFlow is a packet sampling technology used to monitor traffic in a network. It sends sampled packet data and interface counters to an sFlow collector, which analyzes the traffic patterns.
* Information Included in sFlow Datagram:
* Option A:The datagram sent to the sFlow collector includes information about the interface through which the packets entered the agent (the switch or router). This is crucial for understanding where in the network the traffic was captured.
* Option D:sFlow datagrams also include the source and destination VLAN for the sampled packets. This allows for detailed analysis of the traffic flow within different VLANs.
Conclusion:
* Option A:Correct-The ingress interface is included in the sFlow datagram.
* Option D:Correct-The source and destination VLANs are also included, providing context for the sampled traffic.

質問 # 66
......

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