2025年更新のCCNP Enterpriseが有効な300-420問題集を無料提供しています
最新のFast2test 300-420のPDF問題集をダウンロードしちゃおう：https://jp.fast2test.com/300-420-premium-file.html（377問題と解答)
Cisco 300-420試験は、60〜70の複数選択の質問で構成される90分のテストであり、世界中のPearson Vueテストセンターで撮影できます。この試験は、英語と日本語のバージョンで入手できます。候補者は、試験に合格するために、1000ポイントのうち少なくとも750を獲得する必要があります。
Cisco 300-420試験（Designing Cisco Enterprise Networksとも呼ばれる）は、スケーラブルでセキュアで耐久性のある企業ネットワークの設計に焦点を当てた認定試験です。この試験は、企業ネットワークの設計と実装を担当するネットワーク専門家を対象としています。この試験に合格すると、Ciscoテクノロジーを使用して複雑な企業ネットワークソリューションを設計および実装するために必要な知識とスキルを習得できます。
質問 # 221
Which queuing structure is used on SD-WAN Edge routers?
- A. 1P-4Q-2T
- B. FIFO
- C. Priority
- D. LLQ+WRR
正解：D
解説：
On Cisco vEdge devices and Cisco IOS XE SD-WAN devices, each interface has eight queues, which are numbered 0 to 7. Queue 0 is reserved, and is used for both control traffic and low- latency queuing (LLQ) traffic. For LLQ, any class that is mapped to queue 0 must also be configured to use LLQ. Queues 1 to 7 are available for data traffic, and the default scheduling for these seven queues is weighted round-robin (WRR). For these queues, you can define the weighting according to the needs of your network. When QoS is not configured for data traffic, queue 2 is the default queue.
https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/qos/vEdge-20-x/qos- book/forwarding-qos.html
質問 # 222
A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?
- A. 6to4
- B. dual stack
- C. 6VPE
- D. NAT64
正解：B
解説：
Section: Advanced Addressing and Routing Solutions
質問 # 223
A company's security policy requires that all connections between sites be encrypted in a manner that does not require maintenance of permanent tunnels. The sites are connected through a private MPLS-based service that uses a dynamically changing key and spoke-to-spoke communication. Which type of transport encryption must be used in this environment?
- A. DMVPN
- B. GETVPN
- C. GRE VPN
- D. standard IPsec VPN
正解：B
質問 # 224
An architect must create a QoS solution for a customer to ensure that a 40 Mbps Internet connection is shared between four subnets based on these requirements:
- Each subnet must receive no less than 10 Mbps of download bandwidth
during peak traffic times.
- A subnet can use up to 40 Mbps during nonpeak traffic times if the
other subnets are idle.
- Download traffic must never experience a delay.
Which solution must the architect choose?
- A. shaping and policing
- B. rate-limiting and shaping
- C. bandwidth percentage and rate-limiting
- D. bandwidth percentage and policing
正解：D
解説：
Shaping: Shaping is used to control the traffic flow by buffering excess packets during periods of high demand and then releasing them at a rate that conforms to the desired profile. In this case, shaping can be employed to ensure that each subnet receives no less than 10 Mbps during peak traffic times.
Policing: Policing is used to enforce traffic policies by discarding or remarking packets that exceed specified rate limits. In this scenario, policing can be employed to ensure that a subnet does not exceed its allocated bandwidth (40 Mbps) during non-peak times.
質問 # 225
Refer to the exhibit. A customer is planning to deploy a new branch in New York. The new office will not exceed 1024 users. Which subnet must be used to provide maximum number of host addresses while not providing more than necessary?
- A. 192.168.16.0/21
- B. 192.168.8.0/22
- C. 192.168.16.0/22
- D. 192.168.8.0/21
正解：A
質問 # 226
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.)
- A. IP directed broadcast and forward-protocol must be disabled on all the SVI or routed interfaces where the client subnets reside
- B. IP helper-addresses for the client ranges must be enabled on the SVI or routed interface where the WoL server subnet resides
- C. IP helper-addresses for the client ranges must be disabled on the SVI or routed interface where the WoL server subnet resides
- D. IP helper-addresses for the WoL server must be enabled on the SVI or routed interface where the client subnets reside
- E. IP directed broadcast and forward-protocol must be enabled on all the SVI or routed interfaces where the client subnets reside
正解：D、E
質問 # 227
Drag and drop the characteristics from the left onto the Yang model they describe on the right.
Select and Place:
正解：
解説：
質問 # 228
Refer to the exhibit. The failover time of ISP-2 is significantly shorter than ISP-1 when an interface on the ISP router toward the campus network fails. Which solution minimizes the downtime to the sub-second?
- A. Aggressive timers
- B. BFD
- C. Graceful-restart
- D. Next-hop address tracking
正解：B
解説：
BFD provides sub-second failure detection (https://howdoesinternetwork.com/2018/bfd), and next-hop tracking is enabled in IOS by default.
(https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html)
質問 # 229
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. Configure the eBGP TTL to support eBGP multihop.
- B. Use next-hop-serf attributes only for routes that are learned from eBGP peers.
- C. Use maximum-paths to install multiple paths in the routing table.
- D. Use update-source to specify the Loopback interface.
正解：C
質問 # 230
The implementations group has been using the test bed to do a 'proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolated the cause of this fault and answer the following questions.
What is the solution to the fault condition?
- A. Enable OSPF routing on the s0/0/0 interface using the network 10.1.1.0 0.0.0.255 area 12 command.
- B. Redistribute the BGP route into OSPF using the redistribute BGP 65001 subnet command.
- C. Enable OSPF routing on the s0/0/0 interface using the network 209.65.200.0 0.0.0.255 area 12 command.
- D. Enable OSPF authentication on the s0/0/0 interface using the ip ospf authentication message-digest command
正解：D
解説：
On R1, for IPV4 authentication of OSPF the command is missing and required to configure------ ip ospf authentication message-digest
質問 # 231
In the SD-WAN underlay network, which WAN Edge VPN ID is defined as the transport VPN and is used to carry control traffic?
- A. VPN 128
- B. VPN 0
- C. VPN 256
- D. VPN 512
正解：B
質問 # 232
A customer is discussing QoS requirements with a network consultant. The customer has specified that endto- end path verification is a requirement. Which QoS solution meets this requirement?
- A. marking traffic at the access layer with DSCP to support the traffic flows
- B. DiffServ model with PHB to support the traffic flows
- C. IntServ model with RSVP to support the traffic flows
- D. marking traffic at the access layer with CoS to support the traffic flows
正解：C
質問 # 233
Which design achieves SD-WAN control plane redundancy?
- A. Managing the underlay network with OMP
- B. Using multiple instances of vManage in clusters
- C. Configuring BFD on the WAN Edge routers
- D. Deploying using a virtual platform like UCS or CSP
正解：B
質問 # 234
Refer to the exhibit.
An architect must design an IGP solution for an enterprise customer. The design must support:
Physical link flaps should have minimal impact.
Access routers should converge quickly after a link failure.
Which two ISIS solutions should the architect include in the design? (Choose two.)
- A. Advertise the IS-IS interface and loopback IP address toward the Internet and data center.
- B. Configure all access and aggregate routers to establish Level 1 / Level 2 adjacencies across the network.
- C. Configure access routers to establish a Level 1 adjacency and aggregate routers to establish a Level 1 / Level 2 adjacency.
- D. Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.
- E. Reduce SPF and PRC intervals to improve convergence time.
正解：B、E
質問 # 235
Refer to the exhibit. A customer needs to apply QoS to the network management traffic passing through the GigabitEthernet0/2 interface. All eight queuing classes are in use, so the new requirement must be integrated into the existing policy. Which solution must the customer choose?
- A. Mark the traffic to DSCP CS2 and assign it to the ROUTING class Then, baseline existing queue sizes to determine if additional bandwidth can be provisioned to the ROUTING class
- B. Mark traffic to DSCP CS5 and assign it to the SIGNALLING class. Then, baseline existing queue sizes to determine if additional bandwidth can be provisioned to the SIGNALLING class.
- C. Mark the traffic to DSCP CS6 and assign it to the ROUTING class Then, prioritize traffic within the class.
- D. Mark the traffic to DSCP CS4 and assign it to the SIGNALLING class. Then, prioritize traffic within the class.
正解：A
質問 # 236
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