2025年最新の実際に出る無料Cisco 300-420試験問題集と解答 [Q153-Q176]

2025年最新の実際に出る無料Cisco 300-420試験問題集と解答

300-420練習テストエンジンで今すぐ試そう377試験問題

質問 # 153
An engineer uses Postman and YANG to configure a router with:

Which get-config replay verifies that the model set was designed correctly?

A. Option D
B. Option A
C. Option B
D. Option C

正解：A

質問 # 154
An engineer must design a management network that enables SSH, NTP, FTP, and SNMP over the production network. The design requires the management of routers and switches that exist across different networks. Which feature must the design include?

A. Management Plane Protection
B. dedicated management console connection per device
C. terminal server
D. dedicated management VRF connection per device

正解：D

質問 # 155
Refer to the exhibit. An architect is designing an EIGRP solution based on these requirements:
- Traffic forwarding should use the best two paths while all links are
available
- Single path failure must not impact traffic between branch and HQ
Which solution must the architect select?

A. Variance 2
B. Metric weights 010100
C. Maximum-paths 2
D. Add-paths 2

正解：A

質問 # 156
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. Use Bidirectional Forwarding Detection
C. Make all non-backbone areas stub areas
D. Merge all the areas into one backbone area
E. Tune OSPF parameters

正解：B、E

解説：
Network convergence is the time that is needed for the network to respond to events.
One of the significant factors in routing convergence is the detection of link or node failure (events).
This is where BFD comes in to play.
OSPF Timers
The default OSPF LSA propagation timers are quite conservative. Lowering the values of the timers that control OSPF LSA generation can significantly improve OSPF convergence times
https://www.ciscopress.com/articles/article.asp?p=1763921&seqNum=6

質問 # 157
What are two valid scaling techniques when an EIGRP network is designed that consists of more than 1000 routers? (Choose two.)

A. Implement multiple EIGRP autonomous systems
B. Modify delay parameters on the links
C. Used sub-second timers
D. Use the distribute-list command to filter routes
E. Use structured hierarchical topology with route summarization

正解：A、E

質問 # 158
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. shaping
B. violating
C. marking
D. bursting
E. conforming

正解：A、C

質問 # 159
Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 become a transit AS. Which filtering solution must the architect choose?

A. No-advertise
B. Maximum-prefix
C. Next-hop
D. No Export

正解：B

質問 # 160
Drag and drop the properties from the left onto the protocols they describe on the right.

正解：

解説：

質問 # 161
An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same router levels for each protocol per interface. Which IS-IS design is required?

A. multi topology without enabling transition feature
B. single topology with transition feature enabled
C. multi topology with transition feature enabled
D. single topology without enabling transition feature

正解：C

解説：
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/15-mt/irs-15-mt-book/ip6-route-multi-isis.html

質問 # 162
Which two statements about VRRP object tracking are true? (Choose two)

A. VRRP supports only interce tracking
B. The VRRP interface priority must be manually configured by the administrator
C. A VRRP group can track only one object at a time
D. VRRP can track the status of interfaces and routes
E. The priority of a VRRP device can change in accordance with the up or down status of a VRRP object

正解：D、E

質問 # 163
At which layer does Cisco Express Forwarding use adjacency tables to populate addressing information?

A. Layer4
B. Layer 3
C. Layer 2
D. Layer 1

正解：C

質問 # 164
Refer to the exhibit. Where must an architect plan for route summarization for the topology?

A. from the core toward the aggregation and the access toward the aggregation
B. from the aggregation toward the core and the aggregation toward the access
C. from the aggregation toward the access and the access toward the aggregation
D. from the core toward the aggregation and the aggregation toward the core

正解：B

質問 # 165
Which two techniques improve the application experience in a Cisco SD-WAN design? (Choose two.) utilizing forward error correction

A. implementing Cisco Umbrella
B. implementing AMP
C. implementing a stateful application firewall
D. utilizing quality of service

正解：A、C

質問 # 166
Which consideration must be made when designing a Cisco SD-Access fabric underlay?

A. Up to six control planes are supported.
B. The default MTU should be increased.
C. A unified policy must be used.
D. Subnets must be reduced to decrease latency.

正解：B

解説：
Look under "Underlay Network Design". Its the second bullet point. https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#Underlay_Network_Design

質問 # 167
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. Traffic shaping
B. Policer with markdown
C. Queuing
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 # 168
Refer to the exhibit. An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?

A. Campus: 10.0.0.0/10
Branch1: 10.64.0.0/10
Branch2: 10.128.0.0/10
B. Campus: 10.0.0.0/18
Branch1: 10.0.192.0/21
Branch2: 10.0.200.0/21
C. Campus: 10.0.0.0/16
Branch1: 10.255.0.0/20
Branch2: 10.255.16.0/20
D. Campus: 10.0.0.0/20
Branch1: 10.0.64.0/21
Branch2: 10.0.128.0/21

正解：B

質問 # 169
A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

A. Use OSPF with a passive-interface command on the backup connection.
B. Use EIGRP to establish a neighbor relationship with the main office via L3VPN MPLS and the IPSEC VPN tunnel.
C. Use static routes tied to an IP SLA to prefer the primary path while a floating static route points to the backup connection.
D. Use BGP with the multipath feature enabled to force traffic via the primary path when available.

正解：A

質問 # 170
Which two border nodes are available in the Cisco SD-Access architecture? (Choose two.)

A. edge border
B. anywhere border
C. intermediate border
D. internal border
E. extended border

正解：B、D

解説：
Explanation
There are 3 types of border nodes in SD-Access:
External. Default exit from fabric with no specific routes injection
Internal. Gateway only for a set of networks, such as shared services prefixes Anywhere. Combination of external and internal functionality

質問 # 171
Refer to the exhibit.

Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal. Which design provides optimal routing between both networks when the link between routers C and E fails?

A. Create an OSPF virtual link between routers E and F.
B. Make area 10 a not-so-stubby area.
C. Move the link between routers C and D to area 10.
D. Create a tunnel between routers E and F in area 10.

正解：C

質問 # 172
Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.

正解：

解説：

Explanation
Graphical user interface, diagram Description automatically generated with medium confidence

質問 # 173
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. Make router R2 active for half of the VLANs.
B. Enable RSTP on the downstream switches.
C. Configure port channel toward downstream switches.
D. Add more interfaces to R1 and R2.

正解：A

質問 # 174
Refer to the exhibit. A network engineer must design a BGP solution based on:
- The route reflector must have one or more direct physical connections to the core routers (R3 and R4).
- The route reflector must have full redundancy and avoid a single
point of failure.
- R2 to R1 link utilization is 90%, and the remaining links are less
than 50% utilized.
Which two solutions must the design include? (Choose two.)

A. Configure R1 to be a client of R2 and R4.
B. Configure R2 to be a client of R1 and R4.
C. Configure R5 to be a client of R3 and R4
D. Configure R3 to be a client of R2 and R4.
E. Configure R4 to be a client of R1 and R3.

正解：D、E

解説：
We want to try and centralize our Route Reflector, in this example all routers qualify to be Route Reflectors because they have at least 1 link connected to R3/R4 the core Routers.
- We want to try avoid link between R1 and R2 because it's caping at 90%.
- Answer A uses the link that's 90%
- Answer B is not a centralize location, R5 is way down there.
- Answer C utilize the link that's at 90%
- D & E both have redundancy and do not use the link that has 90% and it's centralized.

質問 # 175
An engineer uses Postman and YANG to configure a router with:
- OSPF process ID 200
- network 172.16.10.128/26 enabled for Area 0
Which get-config reply verifies that the model set was designed correctly?