[Dec 09, 2025] ActualPDF 300-420 Exam Practice Test Questions (Updated 341 Questions)
Pass Cisco 300-420 Exam Info and Free Practice Test
How to Pass 300-420 Exam?
The Cisco 300-420 test is a very diligently-designed exam that touches on almost every aspect of Cisco enterprise networking, routing & switching, and designing concepts. Securing the bare minimum passing marks in this exam is not an easy job as it demands more than commitment. All in all, there should be an army of reliable study resources to make a candidate skilled enough to pass the final exam. So, here is a list of some trustworthy resources that have proved beneficial for applicants to have a better hold over exam objectives:
#1 - Designing Cisco Enterprise Networks (ENSLD) v1.0 Course
Managed by Cisco and its associated partners, it is the official training course that the test-takers can join to taste success in the Cisco 300-420 exam. This course, in particular, has been designed by Cisco experts and helps candidates gain the latest information about enterprise network design and its related concepts. To know more, such a training alternative is delivered via classroom and virtual method and is 5 days long. In each delivery mode, candidates will be able to learn via lectures, self-study, and practical sessions. Additionally, taking up this course not only eases down the Cisco 300-420 exam journey but also helps a candidate earn 40 CE credits toward recertification. This way, it can help you reap dual benefits. And when it comes to its target audience, networking design engineers, network engineers, and system administrators are the ideal candidates for such a training course. While there are no official prerequisites to enroll for such a test, it is suggested that applicants should have basic computing and internet understanding. On top of these, a clear understanding of routing and switching fundamentals along with clarity over basic wireless networking concepts and terminology makes the whole course journey way more simplified.
NEW QUESTION # 94
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. bursting
- B. shaping
- C. violating
- D. marking
- E. conforming
Answer: C,E
Explanation:
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
NEW QUESTION # 95
During the integration of ISE and DNA Center, which of the following are used to establish trust through ISE?
- A. REST APIs
- B. Scalable groups
- C. pxGRID services
- D. SGACLs
Answer: C
NEW QUESTION # 96
A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?
- A. Updates that contain changes within the data are sent only when changes occur.
- B. Empty data subscriptions do not generate empty update notifications.
- C. The primary push update is sent immediately and cannot be delayed.
- D. Periodic updates include a full copy of the data that is subscribed to.
Answer: A
NEW QUESTION # 97
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 B
- B. Option C
- C. Option A
- D. Option D
Answer: D
NEW QUESTION # 98
Drag and drop the characteristics from the left onto the YANG modules they describe on the right. Not all options are used.
Answer:
Explanation:
NEW QUESTION # 99
Which nonproprietary mechanism can be used to automate rendezvous point distribution in a large PIM domain?
- A. BSR
- B. Embedded RP
- C. Auto-RP
- D. Static RP
Answer: A
Explanation:
https://networklessons.com/cisco/ccie-routing-switching/multicast-pim-bootstrap- bsr#:~:text=BSR%20(Bootstrap)%20is%20similar%20to,is%20a%20Cisco%20proprietary%20pro tocol.
NEW QUESTION # 100 
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. Move the link between routers C and D to area 10.
- B. Make area 10 a not-so-stubby area.
- C. Create an OSPF virtual link between routers E and F.
- D. Create a tunnel between routers E and F in area 10.
Answer: A
NEW QUESTION # 101
Refer to the exhibit. Where must an architect plan for route summarization for the topology?
- A. from the core toward the aggregation and the aggregation toward the core
- B. from the aggregation toward the access and the access toward the aggregation
- C. from the core toward the aggregation and the access toward the aggregation
- D. from the aggregation toward the core and the aggregation toward the access
Answer: D
NEW QUESTION # 102
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.
Answer:
Explanation:
Explanation
In a dial-in mode, the destination initiates a session to the router and subscribes to data to be streamed. Dialin mode is supported over gRPC in only 64-bit platforms In a dial-out mode, the router initiates a session to the destinations based on the subscription. All 64-bit IOS XR platforms (except for NCS 6000 series routers) support gRPC and TCP protocols. All 32-bit IOS XR platforms support only TCP.
NEW QUESTION # 103
Which protocol is deployed through LAN automation to build node-to-node underlay adjacencies in SDA?
- A. OSPF
- B. OLISP
- C. IS-IS
- D. VXLAN
Answer: C
NEW QUESTION # 104
A company is using OSPF between its HQ location and a branch office. HQ is assigned area 0 and the branch office is assigned area 1. The company purchases a second branch office, but due to circuit delays to HQ, it decides to connect the new branch office to the existing branch office as a temporary measure. The new branch office is assigned to area 2. Which OSPF configuration enables all three locations to exchange routes?
- A. A virtual link must be configured between the new branch office and HQ
- B. The new branch office must be configured as a stub area
- C. A sham link must be configured between the new branch office and HQ
- D. The existing branch office must be configured as a stub area
Answer: A
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 105
Refer to the exhibit.
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. 6rd
- B. 6to4
- C. dual-stack
- D. ISATAP
Answer: A
NEW QUESTION # 106
Drag and Drop Question
Drag and drop the properties from the left onto the protocols they describe on the right.
Answer:
Explanation:
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-
xml/ios/prog/configuration/166/b_166_programmability_cg/b_166_programmability_cg_chapter_0
1011.html
https://www.cisco.com/c/en/us/td/docs/ios-
xml/ios/prog/configuration/169/b_169_programmability_cg/ configuring_yang_datamodel.html
NEW QUESTION # 107
An engineer is designing a multicast network for a financial application Most of the multicast sources also receive multicast traffic (many-to-many deployment model). To better routing tables, the design must not use source trees.
Which multicast protocol satisfies these requirements?
- A. PIM-SSM
- B. MSDP
- C. PIM-SM
- D. BIRDIR-PIM
Answer: D
Explanation:
Bidir-PIM is designed to be used for many-to-many applications within individual PIM domains.
Multicast groups in bidirectional PIM mode can scale to an arbitrary number of sources without incurring overhead due to the number of sources.
NEW QUESTION # 108
Which two statements regarding Cisco SD-WAN vEdge routers can mitigate DoS attacks against the infrastructure? (Choose two.)
- A. The vEdge routers run on hardened Linux operating systems.
- B. Open Certificate Authority and automated enrollment feature.
- C. By default, integrated IDS'IPS on inside and (WAN) side interfaces.
- D. Only authorized controllers are allowed to communicate back to the vEdge router after the vEdge router establishes connections with the controllers.
- E. In case of direct Internet access, the only traffic allowed back is the traffic matching the state table entries on the vEdge router.
Answer: D,E
NEW QUESTION # 109 
Refer to the exhibit A network administrator plans to announce the site subnets to the WAN using route summarization instead of announcing every subnet. What is the smallest summary route that should be used to encompass all subnets at the site?
- A. 2001:DB8::732
- B. 2001:DB8:ABCD:0003::/60
- C. 2001:DB8:ABCD::760
- D. 2001 DB8 ABCD /64
Answer: C
NEW QUESTION # 110
A customer has several remote sites connected with their headquarters through microwave links.
An engineer must propose a backup WAN solution based on these conditions:
- A physical WAN solution is not available for most of the sites.
- The customer has a limited budget and a short time frame for
implementation.
- The backup link will have low bandwidth requirements.
- Users will tolerate a WAN outage of up to 2 hours.
Which backup WAN link type should the engineer recommend?
- A. 802.16 WiMAX
- B. laser link
- C. LTE
- D. 802.15.1 Bluetooth
Answer: C
NEW QUESTION # 111
Drag and drop the characteristics from the left onto the telemetry mode they apply to on the right.
Answer:
Explanation:
NEW QUESTION # 112
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?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 113
An engineer is designing a multicast network for a financial application Most of the multicast sources also receive multicast traffic (many-to-many deployment model). To better routing tables, the design must not use source trees.
Which multicast protocol satisfies these requirements?
- A. PIM-SSM
- B. MSDP
- C. PIM-SM
- D. BIRDIR-PIM
Answer: D
Explanation:
Bidir-PIM is designed to be used for many-to-many applications within individual PIM domains.
Multicast groups in bidirectional PIM mode can scale to an arbitrary number of sources without incurring overhead due to the number of sources.
NEW QUESTION # 114
What are two purposes of the RPF check in multicast routing? (Choose two.)
- A. to ensure that multicast packets are dropped if they arrived on the interface used to route traffic to the destination address
- B. to ensure that multicast packets, no matter the interface they arrived on are forwarded out all interfaces
- C. to ensure that multicast packets are dropped if they arrived on the interface used to route traffic back to the source address
- D. to ensure that multicast packets are forwarded if they arrived on the interface used to route traffic to the destination address
- E. to ensure that multicast packets are forwarded if they arrived on the interface used to route traffic back to the source address
Answer: A,E
NEW QUESTION # 115
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.
Answer:
Explanation:
NEW QUESTION # 116
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