2025年最新の保証された成功できる300-420問題集でCiscoのPDF問題 [Q61-Q78]

2025年最新の保証された成功できる300-420問題集でCiscoのPDF問題

格別な練習Designing Cisco Enterprise Networks問題集で最速合格させます

Cisco 300-420認定試験は、ネットワーク設計のキャリアを前進させようとするITの専門家にとって不可欠な試験です。これは、ネットワーク設計原則、エンタープライズキャンパスアーキテクチャ、WANテクノロジー、セキュリティ、自動化における候補者の習熟度をテストする厳格な試験です。試験に合格することにより、候補者は、Cisco Technologiesを使用して、堅牢でスケーラブルで安全なエンタープライズネットワークの設計と実装に関する専門知識を実証できます。

質問 # 61
An engineer is designing a QoS policy that queues excess packets for later transmission.
Which mechanism must be included in the design?

A. WRED
B. shaping
C. RED
D. policing

正解：B

解説：
https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645- policevsshape.html

質問 # 62
An engineer must design a QoS solution for a customer that is connected to an ISP over a 1Gbps link with a
100Mbps CIR. The ISP aggressively drops all traffic received over which is causing numerous TCP retransmissions. The customer is not using any RTP applications but wants to maximize bandwidth usage up to the CIR. Which QoS solution engineer choose?

A. Policer with markdown
B. Queuing
C. Traffic shaping
D. Policing

正解：D

解説：
Explanation
https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645-policevsshape.html

質問 # 63
Refer to the exhibit.

Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)

A. use HSRP
B. use an IGP
C. use multiple equal-cost links
D. use multiple unequal-cost links
E. use RPVSTP+

正解：B、C

質問 # 64
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 # 65
An engineer is designing a WAN solution for a customer with teams in different branch locations that need to communicate The teams also need to access enterprise applications hosted in the data center and the cloud The customer also must provide guests with connectivity to the internet only, and the internet gateway is located in the data center Which solution must the engineer choose?

A. MPLS Layer 3 VPN with one VRF for corporate access and a separate VRF for guests
B. WAN connectivity from a different service provider for guests
C. firewall placed in data center that fitters any traffic from guests
D. MPLS Layer 3 VPN with a separate VRF for each branch location

正解：A

質問 # 66
Refer to the exhibit. An engineer is planning an IPv4 to IPv6 migration solution for a customer.
The routers in the network can support IPv4 and IPv6, except for the DWDM routers. The DWDM routers provide a Layer 2 link in which the routers peer directly with each other across a DWDM circuit. The circuit also provides connectivity between the mail servers. Which IPv6 migration technique must the engineer deploy?

A. ISATAP
B. 6to4
C. dual-stack
D. 6rd

正解：C

質問 # 67
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. static redistribution
B. distribute lists
C. stub routing
D. prefix lists
E. route summarization

正解：B、E

質問 # 68
An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.

正解：

解説：

質問 # 69
When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?

A. additional bandwidth for headend
B. IPsec forwarding using transport mode
C. encapsulation of traffic with GRE or VTI
D. IPsec forwarding using tunnel mode

正解：C

質問 # 70
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 forwards the traffic to R3 in order to reach R2
B. R1 has no route to R2 and drops the traffic
C. R1 load-balances across the paths through R3 and R4 to reach R2
D. R1 forwards the traffic to R3, but R3 drops the traffic

正解：A

質問 # 71
Refer to the exhibit.

A customer is running HSRP on the core routers. Over time the company has grown and requires more network capacity. In the current environment, some of the downstream interfaces are almost fully utilized, but others are not. Which solution improves the situation?

A. Add more interfaces to R1 and R2.
B. Configure port channel toward downstream switches.
C. Make router R2 active for half of the VLANs.
D. Enable RSTP on the downstream switches.

正解：C

質問 # 72
Which PIM mode uses a shared tree only?

A. sparse
B. source-specific
C. dense
D. bidirectional

正解：D

解説：
In bidirectional mode, traffic is routed only along a bidirectional shared tree that is rooted at the rendezvous point (RP) for the group https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-tech-oview.html#GUID-51D0D6DF-E7F1-4A0E-8E31-D7ED464DF2AC

質問 # 73
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. Reduce SPF and PRC intervals to improve convergence time.
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. Advertise the IS-IS interface and loopback IP address toward the Internet and data center.
E. Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.

正解：A、B

質問 # 74
A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?

A. Periodic updates include a full copy of the data that is subscribed to.
B. Updates that contain changes within the data are sent only when changes occur.
C. Empty data subscriptions do not generate empty update notifications.
D. The primary push update is sent immediately and cannot be delayed.

正解：A

解説：
Explanation
Periodic updates contain a full copy of the subscribed data element or table for all supported transport protocols
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/model_d

質問 # 75
Which feature is used to optimize WAN bandwidth of IGMP network traffic among WAN Edge routers in the same VPN?

A. multicast RP
B. multicast service routes
C. IGMPv2
D. multicast-replicator

正解：D

質問 # 76
You are implementing WAN access for an enterprise network while running applications that require a fully meshed network, which two design standards are appropriate for such an environment? (Choose two)

A. A centralized DMVPN solution to simplify connectivity for the enterprise
B. Multiple MPLS VPN connections with static routing
C. A collapsed core and distribution layer to minimize costs
D. A dedicated WAN distribution layer to consolidate connectivity to remote sites
E. Multiple MPLS VPN connections with dynamic routing

正解：A、D

解説：
With DMVPN phase 2 and 3, spokes can speak with each other directly like they are directly connected in a meshed network. This simplifies the connectivity for the enterprise -> Answer A is correct.
Another way to run applications that require a fully meshed network is through a WAN distribution layer that is connected to all remote sites. Therefore these sites can communicate with each other via this WAN distribution layer.

質問 # 77
Refer to the exhibit.

Refer to the exhibit. Where must an architect plan for route summarization for the topology?