ベストCisco 300-420学習ガイドと問題集は2026年更新
トップクラスCisco 300-420試験最先端学習ガイド！練習問題バージョン
Cisco 300-420試験は、幅広い準備が必要な難しい試験です。候補者は、ネットワーク設計のコンセプトを理解し、Ciscoの技術や製品に精通している必要があります。試験に備えるために、候補者はCiscoのトレーニングおよび認定プログラムを活用することができます。これには、教室でのトレーニング、オンラインコース、自己学習リソースが含まれます。
質問 # 61 
Refer to the exhibit. Which two points in the network must an engineer configure the ports for explicit trust when using a DiffServ model?
- A. A and D
- B. C and D
- C. F and G
- D. B and E
正解：D
質問 # 62 
Refer to the exhibit. A network engineer with an employee ID: 4384:99:754 must design a BGP solution based on these conditions:
* Traffic sessions occur between the branches and the data center.
* Branch B has limited resources to process routing updates.
* HQ must filter out all prefixes from branch A to R4.
Which outbound route filtering (ORF) solution must the engineer choose?
- A. Use a prefix list with the 10.10.10.0/24 subnet for ORF on R5.
- B. Use a prefix list with the 192.168.10.0/24 subnet for ORF on R4.
- C. Use a prefix list with the 10.10.10.0/24 subnet for ORF on R2
- D. Use a prefix list with the 192.168.10.0/24 subnet for ORF on R2.
正解：C
質問 # 63
Refer to the exhibit.
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
- A. Make area 1 a standard OSPF area.
- B. Make area 1 a stub.
- C. Make area 1 a NSSA.
- D. Make the area 1 routers part of area 0.
正解：C
解説：
質問 # 64
An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from sources in another AS. Which feature must the design include?
- A. Bidirectional PIM
- B. SSM
- C. MSDP
- D. Anycast RP
正解：D
解説：
Explanation
https://learningnetwork.cisco.com/s/question/0D53i00000KsrGrCAJ/rendezvous-point-high-availability-mechan
質問 # 65
Which two steps can be taken to improve convergence in an OSPF network? (Choose two.)
- A. Span the same IP network across multiple areas.
- B. Tune OSPF parameters
- C. Make all non-backbone areas stub areas
- D. Merge all the areas into one backbone area
- E. Use Bidirectional Forwarding Detection
正解：B、E
質問 # 66
Drag and Drop Question
Drag and drop the characteristics from the left onto the Yang model they describe on the right.
正解：
解説：
質問 # 67
Drag and drop the properties from the left onto the Cisco SD-WAN components that perform them on the right.
正解：
解説：
Explanation
Graphical user interface, application Description automatically generated
質問 # 68
Drag and drop the properties from the left onto the protocols they describe on the right.
正解：
解説：
質問 # 69
An engineer must use YANG with an XML representation to configure a Cisco IOS XE switch with these specifications:
IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0 connectivity from a directly connected host 10.10.10.1/27 Which YANG data model set must the engineer choose?
A)
B)
C)
D)
- A. Option D
- B. Option A
- C. Option B
- D. Option C
正解：A
質問 # 70
What are two valid scaling techniques when an EIGRP network is designed that consists of more than 1000 routers? (Choose two.)
- A. Use structured hierarchical topology with route summarization
- B. Implement multiple EIGRP autonomous systems
- C. Used sub-second timers
- D. Modify delay parameters on the links
- E. Use the distribute-list command to filter routes
正解：A、B
解説：
Section: Advanced Addressing and Routing Solutions
質問 # 71
What is the purpose of a control plane node in a Cisco SD-Access network fabric?
- A. to maintain the endpoint database and mapping between endpoints and edge nodes
- B. to identify and authenticate endpoints within the network fabric
- C. to act as the network gateway between the network fabric and outside networks
- D. to detect endpoints in the fabric and inform the host tracking database of EID-to-fabric-edge node bindings
正解：D
質問 # 72
Refer to the exhibit.
EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?
- A. R1 load-balances across the paths through R3 and R4 to reach R2
- B. R1 forwards the traffic to R3, but R3 drops the traffic
- C. R1 forwards the traffic to R3 in order to reach R2
- D. R1 has no route to R2 and drops the traffic
正解：D
解説：
The EIGRP stub routing feature will prevent the remote device from advertising core routes back to the distribution devices. Routes learned by the remote device from Distribution 1 will not be advertised to Distribution 2. Therefore, Distribution 2 will not use the remote device as a transit for traffic destined to the network core https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-eigrp-stub-rtg.html
質問 # 73
Refer to the exhibit. An architect must design a solution to connect the two ASs. To optimize bandwidth, the design will implement load sharing between router R6 and router R4. Which solution should the design include?
- A. Use update-source to specify the Loopback interface.
- B. Use maximum-paths to install multiple paths in the routing table.
- C. Configure the eBGP TTL to support eBGP multihop.
- D. Use next-hop-serf attributes only for routes that are learned from eBGP peers.
正解：B
質問 # 74
An engineer must design a multicast network for a financial application.
Most of the multicast sources also receive multicast traffic (many-to-many deployment model).
To better scale routing tables, the design must not use source trees.
Which multicast protocol satisfies these requirements?
- A. MSDP
- B. PIM-SSM
- C. PIM-SM
- D. BIDIR-PIM
正解：D
解説：
BIDIR-PIM is designed to be used for many-to-many applications within individual PIM domains.
Multicast groups in bidirectional PIM mode can scale to an arbitrary number of sources without incurring overhead due to the number of sources.
https://www.cisco.com/c/dam/en/us/products/collateral/ios-nx-os-software/multicast- enterprise/prod_white_paper0900aecd80310db2.pdf
質問 # 75
Refer to the exhibit. A network engineer is designing an OSPF solution to connect a company's remote to a newly provisioned MPLS VPN backbone. Some of the branches have a direct dark fiber connection between each other. The engineer wants to ensure that the dark fibers are used only when the MPLS core is unavailable. Which solution must the engineer choose?
- A. Sham link
- B. Virtual link
- C. Stub area
- D. NSSA
正解：A
解説：
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe-16/iro-xe-16-book/iro-sham-link.html
質問 # 76
Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
* conserve bandwidth, memory, and CPU processing
* prevent suboptimal routing
* avoid any unnecessary queries
Which two solutions must the architect select? (Choose two.)
- A. Stub routing
- B. Route summarization
- C. Distribute lists
- D. Prefix lists
正解：A
質問 # 77
What is the purpose of the fabric control plane in a Cisco SD-Access architecture?
- A. extend multiple subnets to one RLOC
- B. create, propagate, and enforce G6AC policies in the fabric
- C. create and resolve endpoint-to-location mapping
- D. create a transit node with BGP route reflector functionality
正解：C
質問 # 78
An engineer is designing a network for a customer running a wireless network with a common VLAN for all APs. The customer is experiencing unicast flooding in the Layer 2 network between the aggregation and access layers. The customer wants to reduce the flooding and improve convergence time. Which solution meets these requirements?
- A. Align HSRP primary and STP root bridges and reduce ARP timers to match CAM timers on the aggregation layer switches.
- B. Migrate all APs to a common Layer 2 access layer switch and run Layer 3 from the aggregation layer to all remaining access layer switches.
- C. Align HSRP primary and STP root bridges if the APs cannot run on separate VLANs.
- D. Migrate to a Layer 3 access campus design if the APs can run on separate VLANs.
正解：C
質問 # 79
An architect must design an IPv6 migration solution for a corporation with remote offices to support:
* The customer has IPv4 peering with their service provider.
* IPv6 users need access to IPv4 and IPv6 resources.
* Existing content providers will migrate to IPv6 in the next two years.
* Users will be migrated in a phase-by-phase approach.
Which migration solution must the architect choose?
- A. NAT46
- B. dual-stack
- C. tunneling
- D. NAT64
正解：B
質問 # 80
An engineer must peer with an ISP for internet connectivity using BGP, initially, the engineer wants to receive only specific prefixes from the ISP and a default route. However, the solution must provide the flexibility to add prefixes in the future at short notice. The ISP has a two-week change process in place. Which route filtering solution must the engineer employ?
- A. Configure outbound route filtering on the enterprise and ISP so that the enterprise tell the ISP which prefixes are required
- B. Request a limited internet routing table and a default route from the ISP and configure the BGP max-limit to 1 with an access list that permits only the specific internet prefixes and blocked networks
- C. Request only the required prefixes and default route be advertised from the ISO with whitelisted networks
- D. Request a full internet routing table and a default route from the ISP and configure inbound route filtering with a prefix list that permits the default route and required prefixes
正解：D
解説：
Any change on the prefix list, engineer only need to update the prefix list and restart the BGP peer to the ISP. soft-reconfiguration inbound could be used to reduce down time of reset BGP peer, but it require lots of memory and in this case, connection to ISP and tons of route learnt will not be appropriated.
質問 # 81
A company wants to switch from static routing to a dynamic routing protocol to ease the administrative and operational overhead. The network topology is hub and spoke, and the branches use DMVPN back to the hub using two 100 Mbps internet connections. Both links must be used due to spikes in traffic, and routing must take traffic utilization of the links into account.
Also, the branch routers have limited memory and CPU resources.
Which routing protocol and design solution must the company choose?
- A. EIGRP with branch routers as stub routers using ECMP
- B. OSPF deployed in area 0 with branch routers connecting from area 1
- C. ISIS with the hub and spoke routers configured in two different areas
- D. iBGP with the hub routers set up as route reflectors and branches set up as clients
正解：A
質問 # 82 
Refer to the exhibit A network administrator plans to announce the site subnets to the WAN using route summarization instead of announcing every subnet. What is the smallest summary route that should be used to encompass all subnets at the site?
- A. 2001 DB8 ABCD /64
- B. 2001:DB8::732
- C. 2001:DB8:ABCD::760
- D. 2001:DB8:ABCD:0003::/60
正解：C
質問 # 83
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Ciscoの300-420試験、またはDesigning Cisco Enterprise Networks（ENSLD）は、企業レベルのネットワークソリューションを設計するスキルと知識を検証するプロフェッショナルレベルの認定試験です。この試験は、複雑な企業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エンジニア、アーキテクト、およびデザイナーを対象としています。
Cisco 300-420試験は、ネットワークの自動化、ネットワークセキュリティ、高度なルーティング・スイッチング技術、およびネットワーク仮想化など、企業ネットワーク設計に関連する幅広いトピックをカバーしています。試験は60〜70の多肢選択問題とシミュレーション問題から成り、90分以内に完了する必要があります。候補者は試験で少なくとも750点を獲得する必要があります。
有効な300-420試験最新問題で2026年最新の学習ガイド：https://jp.fast2test.com/300-420-premium-file.html
300-420認定で究極のガイド：https://drive.google.com/open?id=1W3rRD7uGS7P60uWaqz-6ZdBLhR0jsHfl