cisco 300-420 Exam Questions

Questions for the 300-420 were updated on : Dec 01 ,2025

Page 1 out of 23. Viewing questions 1-15 out of 339

Question 1

An architect is designing a network solution for a customer The network is IPv6-only with 1000 hosts.
The design must provide external access to up to 10 concurrent IPv6 hosts to allow communication
with legacy IPv4 devices on an adjacent network. The customer set aside 10 IPv4 addresses to allow
for one-to-one communication between hosts. Which solution must the architect select?

  • A. stateful NAT64
  • B. static NAT-PT
  • C. dynamic NPTv6
  • D. dynamic NAT-PT
Answer:

A

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Question 2

In PIM sparse mode, if an RPF check is successful on a multicast-enabled device, what happens to the
multicast packet?

  • A. It is forwarded to all interfaces within the OIL.
  • B. It is forwarded to all interfaces except for the receiving interface.
  • C. Forwarded packets are dropped to prevent looping.
  • D. It is forwarded to all PIM-enabled interfaces.
Answer:

A

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Question 3

An enterprise needs to enhance its WAN availability after a recent outage with its only MPLS
provider. The proposed solution must have a quick deployment, be affordable, be reliable, and work
as a backup for the enterprise's primary MPLS connection. Which solution meets these
requirements?

  • A. Contract an internet connection and deploy DMVPN.
  • B. Deploy BFD echo mode and probe provider PE
  • C. Deploy an additional WAN router and use a floating static route
  • D. Contract another MPLS provider and deploy GET VPN.
Answer:

A

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Question 4

A customer requested that a guaranteed service line be enabled for a manufacturing business in
different countries. On the customer side, the QoS-aware application is used to process large data
chunks. The application cannot tolerate drops and latency should be as low as possible. Which QoS
model must an engineer employ to use the minimum required resources on the ISP network nodes?

  • A. Implement a group-based QoS strategy with FECs enabled
  • B. Enable a flow-based QoS strategy with queuing elements.
  • C. Implement an end-to-end QoS strategy with SLA.
  • D. Configure a domain-based QoS strategy with PHB behavior.
Answer:

C

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Question 5

What is the main purpose of the Cisco SD-Access underlay design?

  • A. to enable automated network provisioning and configuration
  • B. to support advanced firewall and IPS features
  • C. to optimize network traffic routing and load-balancing
  • D. to provide network segmentation and isolation for security
Answer:

D

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Question 6

What is the purpose of Cisco vBond as a Session Traversal Utilities for NAT server?

  • A. allow Cisco Catalyst SD-WAN routers to locate their own mapped IP addresses
  • B. integrate Cisco SD-Access Wireless into the fabric
  • C. secure data traffic between Cisco Catalyst SD-WAN edge routers that use IPsec
  • D. provide Zero-Touch Provisioning to Cisco Catalyst SD-WAN vEdge devices
Answer:

D

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Question 7

DRAG DROP
Drag and drop the Cisco Catalyst SD-WAN components from the left to their definitions on the nght

Answer:

None

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Question 8

Refer to the exhibit.

Refer to the exhibit An architect is designing an IPv4 plan using the 172 20 0.0/16 network The
design must maximize the number of subnets and minimize the number of wasted IP addresses In
addition, the plan must allocate a subnet to these customers and links
Customer A, which supports 125 hosts
Customer D, which supports 62 hosts
Links B C. and E
Which two configuration sets meet these requirements'? (Choose two)
A)

B)

C)

D)

E)

  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D
Answer:

A, C

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Question 9

Refer to the exhibit.

Refer to the exhibit An engineer with an employee ID: 1234 56:789 must design a WoL deployment
for a client, and the design must ensure that the Windows PCs are responsive to the WoL magic
packets with no delays when the server-side initiates the instruction Which action must the engineer
choose?

  • A. Spanning-tree PortFast must be enabled on all interfaces where clients reside.
  • B. WoL must be enabled on the networking card and disabled in the Windows PCs BIOS.
  • C. IP-directed broadcast must be disabled on all interfaces where clients reside.
  • D. IP forward protocol must be disabled on all interfaces where clients reside
Answer:

B

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Question 10

Currently, inter-VRF routing between the global routing table and VRF-A is accomplished on the
client firewall, but the customer wants to do this on the core network layer. The customer does not
want to run BGP, VRF-Lite: or static routing Which mechanism meets the requirements?

  • A. policy-based routing with the global set statement in a route map
  • B. route map that matches access lists and prefix lists with the import feature
  • C. inter-VRF can only be used on an external device with a link in each VRF
  • D. VRF receive feature under the global routing interfaces
Answer:

D

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Question 11

What is a challenge of the SaaS model?

  • A. higher initial costs
  • B. lack of application and infrastructure control
  • C. requires upgrades to individual computers to meet performance requirements
  • D. higher application and data integration complexity
Answer:

B

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Question 12

Refer to the exhibit.

Refer to the exhibit A customer requires a Layer 2 network designed to support:
500 active logical ports
trunking of 30 VLANs
convergence of less than 1 second
Which Spanning Tree Protocol must be selected?

  • A. RPVST+
  • B. MSTP
  • C. CST
  • D. PVST+
Answer:

A

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Question 13

When expanding an existing Cisco SD-Access network, in addition to the control plane, which two
device roles are needed to create an additional fabric site? (Choose two.)

  • A. leaf
  • B. cEdge
  • C. WLC
  • D. edge
  • E. border
Answer:

D, E

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Question 14

A company wants to enable several third-party video conferencing networks based on multicast
services. The video conferencing platform can accommodate numerous and dispersed senders and
receivers in third-party networks The interior routing protocol is OSPF and the exterior routing
protocol is BGP Which multicast mode must be selected to achieve this goal?

  • A. Enable MP-BGP
  • B. Enable BIDIR-PIM
  • C. Configure MSDP
  • D. Set IGMPv2.
Answer:

B

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Question 15

Which integration capability does gRPC provide?

  • A. leveraging the LDAP protocol for authentication and directory services ensuring secure access control in RPC communications
  • B. leveraging the XMPP protocol for real-time messaging and collaboration between client and server applications
  • C. leveraging protocol buffers to provide efficient serialization and deserialization of structured data over the network
  • D. leveraging GRAPH-API for network monitoring and management providing comprehensive visibility into RPC-related metrics and performance statistics
Answer:

C

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