P.S. GoShikenがGoogle Driveで共有している無料かつ新しい300-420ダンプ：https://drive.google.com/open?id=1C23VImXEkA5pXZBvY1fXY-Bo6tnNAnYs
GoShikenにIT業界のエリートのグループがあって、彼達は自分の経験と専門知識を使ってCisco 300-420認証試験に参加する方に対して問題集を研究続けています。
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Designing Cisco Enterprise Networks |
| Exam Number: | 300-420 ENSLD |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 55–65 |
| Available Languages: | Japanese, English |
| Passing Score: | Pass/Fail |
| Exam Price: | USD 400 |
| Exam Format: | Simulations, Scenario-based, Multiple choice, Drag-and-drop |
| Related Certifications: | Cisco Certified Specialist – Enterprise Design Cisco Certified Network Professional (CCNP) Enterprise |
| Recommended Training: | Designing Cisco Enterprise Networks (ENSLD) Official Training |
| Exam Registration: | Pearson VUE Cisco Official Registration |
| Sample Questions: | Cisco 300-420 Sample Questions |
| Exam Way: | Online proctored or in-person at authorized test centers |
| Pre Condition: | Recommended: Implementing and Operating Cisco Enterprise Network Core Technologies (350-401 ENCOR) or equivalent knowledge |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/ensld-300-420.html |
GoShikenのCiscoの300-420試験トレーニング資料はPDF形式とソフトウェアの形式で提供します。それはGoShikenのCiscoの300-420試験の問題と解答を含まれます。そして、その学習教材の内容はカバー率が高くて、正確率も高いです。それはきっと君のCiscoの300-420試験に合格することの良い参考資料です。もし不合格になる場合は、ご心配なく、私たちは資料の費用を全部返金します。
Cisco 300-420試験は、Ciscoテクノロジーを使用してエンタープライズネットワークを設計するITプロフェッショナルの知識とスキルを検証する認定試験です。この試験は、複雑なエンタープライズネットワークを設計および実装する責任があるネットワークデザイナー、アーキテクト、エンジニアを対象としています。
質問 # 387
Refer to the exhibit. An architect is designing an IPv4 plan using the 172.20.0.0/16 network. The design must maximize the number of subnets and minimize the number of wasted IP addresses.
In addition, the plan must allocate a subnet to these customers and links:
- Customer A, which supports 125 hosts
- Customer D, which supports 62 hosts
- Links B, C, and E
Which two configuration sets meet these requirements? (Choose two.)
正解：D、E
解説：
172.20.0.128/25 for Customer A supports 128 IPs (126 usable), which fits 125 hosts.
172.20.1.0/26 for Customer D supports 64 IPs (62 usable), which fits 62 hosts.
/30 subnets (172.20.1.68/30, 172.20.1.72/30, 172.20.1.76/30) provide 4 IPs each (2 usable), ideal for point-to-point links, maximizing subnet usage and minimizing waste.
質問 # 388
A customer plans to deploy WoL in the enterprise with these high-level design requirements:
DHCP services must be available.
Clients BIOS settings must be set for WoL.
Clients get IP addresses once online.
Spanning-tree PortFast is enabled on the Layer 2 switches.
Which two solutions must the customer select to have a successful deployment? (Choose two.)
正解：B、C
解説：
Wake-on-LAN across routed boundaries requires directed broadcast handling toward the client subnet and helper behavior to forward the magic packet correctly. A sleeping host normally does not maintain a normal IP session, so the WoL magic packet is commonly sent as a directed broadcast to the destination subnet. Cisco designs therefore enable IP directed broadcast on the routed interface or SVI for the client subnet where the sleeping endpoints reside, while controlling the feature carefully to avoid abuse. The ip forward-protocol behavior is also relevant because routers must forward the required UDP broadcast traffic rather than dropping it at the Layer 3 boundary. In addition, an IP helper address toward the WoL server or relay path may be needed on client-facing interfaces so the magic packet can be delivered from the management or server subnet to the client subnet. PortFast helps endpoints become reachable quickly at Layer 2, but it does not replace routed broadcast forwarding. Reference topics: Wake-on-LAN, directed broadcast, ip helper- address, UDP forwarding, PortFast, campus services.
質問 # 389
An architect must design a topology for a WAN network that satisfies these requirements:
* Devices must be able to make informed decisions.
* Suboptimal paths are allowed only In case of a failure.
* Backup paths must always be available.
Which topology must the architect select?
正解：A
解説：
A full-mesh topology best satisfies the requirement that devices make informed forwarding decisions, backup paths always exist, and suboptimal paths are used only after a failure. In a full mesh, each site or WAN node has direct connectivity to every other relevant node. This gives the routing protocol complete path visibility and allows traffic to use direct optimal paths under normal conditions. If a direct link fails, alternate paths remain available through other nodes, so the network can reroute without depending on a single hub. A hub- and-spoke design is simpler and less expensive, but spoke-to-spoke traffic must traverse the hub, which is suboptimal even during normal operation. A partial mesh can reduce cost but may still force some traffic over indirect paths when no direct connection exists. Clos is a data center fabric topology concept and is not the typical WAN topology answer here. The full mesh is the most resource-intensive design, but it best matches the stated forwarding and backup requirements. Reference topics: WAN topology, full mesh, path optimality, backup paths, routing convergence.
質問 # 390
A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?
正解：D
解説：
LFA FRR is the correct improvement because it gives OSPF a precomputed repair path instead of waiting for normal SPF reconvergence after a component failure. Cisco describes OSPF LFA Fast Reroute as using a precomputed alternate next hop to reduce failure reaction time when the primary next hop fails. The forwarding plane can move traffic to the alternate path while the control plane reconverges, which directly addresses the short outage described in the question. Incremental SPF reduces CPU impact by recomputing only the affected part of the SPF tree, but it still relies on the post-failure SPF process. BFD detects a failure quickly, but by itself it does not install a loop-free repair path. Aggressive timers also improve detection but increase control-plane sensitivity and do not provide local repair. In an enterprise OSPF design where the complaint is outage during recomputation, LFA FRR is the stronger availability mechanism. Reference topics:
OSPF Loop-Free Alternate, IP Fast Reroute, SPF convergence, local repair paths, routed resiliency.
質問 # 391
An engineer is tasked with designing a dual BGP peering solution with a service provider. The design must meet these conditions:
* The routers will not learn any prefix with a subnet mask greater than /24.
* The routers will determine the routes to include in the routing table based on the length of the mask alone.
* The routers will make this selection regardless of the service provider configuration.
Which solution should the engineer include in the design?
正解：B
解説：
An inbound IP prefix list is the correct tool because the routers must decide which prefixes to accept from the service provider based only on prefix length. Prefix lists are designed to match network prefixes and mask- length ranges using operators such as le and ge. Applying the prefix list inbound to the BGP neighbors prevents routes with masks longer than /24 from entering the local BGP table, regardless of what the service provider advertises. This conserves memory and ensures the customer routing policy is enforced locally. An access list is a poor fit because it does not natively express prefix-length logic as cleanly as a prefix list.
Applying the policy outbound would filter routes the customer sends to the provider, which is the wrong direction; the requirement is about routes the customer learns. A route map could reference a prefix list, but the simplest and most exact answer is to use an IP prefix list inbound. Therefore, the design should apply an inbound prefix list to both BGP peers to block prefixes greater than /24. Reference topics: BGP route filtering, prefix lists, inbound policy, maximum accepted prefix length.
質問 # 392
......
300-420基礎訓練: https://www.goshiken.com/Cisco/300-420-mondaishu.html
さらに、GoShiken 300-420ダンプの一部が現在無料で提供されています：https://drive.google.com/open?id=1C23VImXEkA5pXZBvY1fXY-Bo6tnNAnYs