Cisco 300-420テストエンジン問題集トレーニングには348問あります
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Cisco 300-420試験に合格することで、Cisco Certified Specialist - Enterprise Design認定を取得できます。この認定は、Ciscoテクノロジーを使用して企業ネットワークを設計するために必要な知識とスキルを持っていることを示しています。ネットワーク設計とアーキテクチャのキャリアを進めたいITプロフェッショナルにとって貴重な資格です。
質問 # 178
Drag and Drop Question
Drag and drop the properties from the left onto the Cisco SD-WAN components that perform them on the right.
正解：
解説：
質問 # 179
Which function are fabric intermediate nodes responsible for in an SD-Access Architecture?
- A. mapping EIDs to RLOCs
- B. transporting IP packets between edge nodes and border nodes
- C. encapsulating user traffic in a VXLAN header including the SGT
- D. registering new endpoints in the HTDB
正解：B
質問 # 180
An infrastructure team is concerned about the shared memory utilization of a device, and for this reason, they need to monitor the device state. Which solution limits impact on the device and provides the required data?
- A. on-change subscription
- B. static telemetry
- C. IPFIX
- D. periodic subscription
正解：C
質問 # 181 
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 WAN 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 forwards the traffic to R3, but R3 drops the traffic
- B. R1 load-balances across the paths through R3 and R4 to reach R2
- 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：C
解説：
Section: Advanced Addressing and Routing Solutions
質問 # 182
An organization is designing a detailed QoS plan that limits bandwidth to specific rates.
Which two parameters are supported be the traffic policing feature? (Choose two.)
- A. marking
- B. violating
- C. conforming
- D. shaping
- E. bursting
正解：B、C
解説：
https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645- policevsshape.html
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_plcshp/configuration/xe-17/qos-plcshp-xe-
17-book/qos-plcshp-trfc-plc.pdf
質問 # 183
Refer to the exhibit.
Refer to the exhibit. The distribution switches serve as the layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?
- A. Use the preempt delay feature on the backup HSRP device
- B. Configure a higher mac-refresh interval on both HSRP devices
- C. Use the preempt delay feature on the primary HSRP device.
- D. Increase the hello timers on both HSRP devices
正解：C
質問 # 184
Refer to the exhibit. An architect is developing a solution to consolidate networks while retaining device redundancy. The routing protocol for the WAN routers must be open standard, ensure high availability, and provide the fastest convergence time. Which solution must the design include?
- A. both routers running OSPFv2
- B. both routers running EIGRP
- C. one router running OSPFv2 and other OSPF v3
- D. one router running ISIS and other OSPF v3
正解：B
解説：
EIGRP has a function called "EIGRP Ipv6" (But that can still be called "EIGRP")
質問 # 185
Drag and drop the characteristics from the left onto the YANG modules they describe on the right. Not all options are used.
正解：
解説：
質問 # 186
Which component of Cisco SD-Access integrates with Cisco DNA Center to perform policy segmentation and enforcement through the use of security group access control lists and security group tags?
- A. Cisco Identity Services Engine
- B. Cisco Application Policy Infrastructure Controller Enterprise Module
- C. Cisco TrustSec
- D. Cisco Network Data Platform
正解：C
解説：
Section: Advanced Enterprise Campus Networks
質問 # 187
Which QoS feature responds to network congestion by dropping lower priority packets?
- A. WRED
- B. CBWFQ
- C. strict priority
- D. tail drop
正解：A
解説：
WRED can selectively discard lower priority traffic when the interface begins to get congested and provide differentiated performance characteristics for different classes of service.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_conavd/configuration/15-mt/qos-conavd-
15-mt-book/qos-conavd-
oview.html#:~:text=WRED%20can%20selectively%20discard%20lower,for%20different%20class es%20of%20service.
質問 # 188
A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch. An architect must redesign the Layer 2 domain to achieve these goals:
* reduce the impact of topology changes
* reduce the time spent on network administration
* reduce manual configuration errors
Which two solutions should the architect include in the new design? (Choose two.)
- A. Configure broadcast and multicast storm control on all switches.
- B. Configure dynamic trunking protocol to propagate VLAN information.
- C. Implement Rapid PVST+ instead of STP.
- D. Use VTP to propagate VLAN information and to prune unused VLANs.
- E. Implement MST instead of STP.
正解：A、D
解説：
Section: Advanced Enterprise Campus Networks
質問 # 189
An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?
- A. IEEE
- B. IETF
- C. Native
- D. OpenConfig
正解：C
解説：
https://github.com/YangModels/yang/tree/master/vendor/cisco
https://blogs.cisco.com/developer/which-yang-model-to-use
質問 # 190
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.
正解：
解説：
Reference:
https://www.cisco.com/c/en/us/td/docs/iosxr/asr9000/telemetry/b-telemetry-cg-asr9000-61x/b-telemetry-cgasr9000-
61x_chapter_010.html#id_36445
質問 # 191
Refer to the exhibit.
Refer to the exhibit. A customer has two eBGP peerings from a single CE router toward two service providers. The customer has hired an architect to design a solution to ensure certain traffic enters the customer's network through interface gig0/0. Which solution must the architect include in the design?
- A. Advertise a lower MED value toward the less preferred service provider.
- B. Prepend additional AS on the AS path toward the preferred service provider.
- C. Set a higher local preference to the preferred service provider path.
- D. Break aggregated routes into longer prefixes and advertise to the preferred service provider.
正解：A
質問 # 192
Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)
- A. use an IGP
- B. use multiple equal-cost links
- C. use HSRP
- D. use R-PVSTP+
- E. use multiple unequal-cost links
正解：A、B
質問 # 193
When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)
- A. MLD
- B. BIDIR-PIM
- C. MP-BGP
- D. IGMPv2
- E. MSDP
正解：C、E
質問 # 194
Which consideration must be taken into account when using the DHCP relay feature in a Cisco SD-Access Architecture?
- A. DHCP Option-82 must be enabled to map the circuit IP option to the access fabric node where the DHCP discover originated.
- B. A DHCP server must be enabled on the border nodes to allow subnets to span multiple fabric edges.
- C. DHCP-relay must be enabled on fabric edge nodes to provide the correct mapping of DHCP scope to the local anycast gateway.
- D. DHCP servers must support Cisco SD-Access extensions to correctly assign IPs to endpoints in an SDAccess fabric with anycast gateway.
正解：C
質問 # 195
An engineer must design a VPN solution for a company that has multiple branches connecting to a main office. What are two advantages of using DMVPN instead of IPsec tunnels to accomplish this task? (Choose two.)
- A. lower traffic overhead
- B. support for AES 256-bit encryption
- C. support for anycast gateway
- D. greater scalability
- E. dynamic spoke-to-spoke tunnels
正解：D、E
解説：
Greater scalability: DMVPN is a more scalable solution than IPsec tunnels. This is because DMVPN uses a hub-and-spoke topology, which allows for the easy addition or removal of spokes without having to reconfigure the entire network. IPsec tunnels, on the other hand, are point-to- point connections, which can be more difficult to scale.
Dynamic spoke-to-spoke tunnels: DMVPN supports dynamic spoke-to-spoke tunnels. This means that tunnels are only created between spokes when they need to communicate with each other.
This can help to reduce traffic overhead and improve performance. IPsec tunnels, on the other hand, are static tunnels, which means that they are always up, even when they are not needed.
質問 # 196
An engineer is working for a large cable TV provider that requires multiple sources streaming video on different channels using multicast with no rendezvous point. Which multicast protocol meets these requirements?
- A. PIM-SSM
- B. PIM-SM
- C. BIDIR-PIM
- D. any-source multicast
正解：A
解説：
Explanation
PIM-SSM is suitable for when well-known sources exist within the local PIM domain and for broadcast applications. Also, PIM-SSM eliminates the RPs and shared trees
質問 # 197
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