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To successfully pass the Cisco 300-420 Certification Exam, candidates must have a solid understanding of Cisco enterprise network design principles, including network topology, routing protocols, and network security. Additionally, candidates must have hands-on experience with Cisco technologies, including Cisco DNA Center, virtualization technologies, and network automation tools. 300-420 exam consists of multiple-choice questions, simulations, and drag-and-drop exercises, and candidates are required to demonstrate their expertise in designing enterprise networks using Cisco technologies. Upon passing the exam, candidates will earn the Cisco Certified Design Professional (CCDP) certification, which is recognized globally as a symbol of expertise in enterprise network design.
Cisco 300-420 exam is a 90-minute test with 60-70 multiple-choice questions. 300-420 exam is conducted in English and is available at Pearson VUE test centers worldwide. 300-420 exam fee is $300 USD, and the certification is valid for three years. Candidates who pass the exam will earn the Cisco Certified Design Professional (CCDP) certification.
NEW QUESTION # 122
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. one router running ISIS and other OSPF v3
- B. one router running OSPFv2 and other OSPF v3
- C. both routers running EIGRP
- D. both routers running OSPFv2
Answer: C
Explanation:
EIGRP has a function called "EIGRP Ipv6" (But that can still be called "EIGRP")
NEW QUESTION # 123
Which component is part of the Cisco SD-Access overlay architecture?
- A. leaf node
- B. border node
- C. spine node
- D. Cisco DNA Center
Answer: D
NEW QUESTION # 124
Which function do reverse path forwarding mechanisms perform in a multicast deployment?
- A. They send PIM prune message toward multicast sources.
- B. They notify the upstream router of multicast traffic.
- C. They prevent loops and duplicate packets.
- D. They eliminate overlapping multicast addresses
Answer: C
Explanation:
Reverse path forwarding (RPF) mechanisms are used to prevent loops and duplicate packets in multicast deployments [1]. The RPF check verifies that all multicast traffic received on a router is sourced from the expected direction, ensuring that multicast traffic is not looped back in the network. The RPF check works by comparing the source IP address of a multicast packet with the routing table, and only forwarding it if it matches the expected entry.
NEW QUESTION # 125
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 # 126
Refer to the exhibit.
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 core toward the aggregation and the aggregation toward the core
- D. from the aggregation toward the access and the access toward the aggregation
Answer: B
NEW QUESTION # 127 
Refer to the exhibit. An architect must design a solution to connect the network behind R3 with the EIGRP network. Which mechanism should be included to avoid routing loops?
- A. split horizon
- B. down bit
- C. summarization
- D. route tags
Answer: D
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 128
How is internet access provided to a WAN edge router that is connected to a MPLS transport link?
- A. An extranet must be provided in the MPLS transport network to allow private traffic to reach the public internet
- B. TLOC extensions are used to route traffic to a WAN Edge router that is connected to the Internet transport network
- C. OMP advertises a default route from a WAN Edge router that is connected to the MPLS and internet transport networks
- D. Internet access must be provided at the WAN Edge router through either a 4G/5G link or local Internet circuit
Answer: B
NEW QUESTION # 129
A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?
- A. dual stack
- B. 6to4
- C. 6VPE
- D. NAT64
Answer: A
NEW QUESTION # 130
Drag and drop the characteristics from the left onto the Yang model they describe on the right.
Select and Place:
Answer:
Explanation:
NEW QUESTION # 131
An engineer must use YANG with an XML representation to configure a Cisco IOS XE switch with these specifications:
* IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0
* connectivity from a directly connected host 10.10.10.1/27
Which YANG data model set must the engineer choose?
A)
B)
C)
D)
- A. Option A
- B. Option C
- C. Option B
- D. Option D
Answer: D
NEW QUESTION # 132
Exhibit:
Refer to the exhibit. An engineer is designing a Layer 2 campus network. The design must support fast convergence and leverage as much bandwidth as possible between layers. Distribution switches do support VSS; unfortunately, not all routing protocols are available for use due to license limitations. Which solution must the engineer choose?
- A. EtherChannel
- B. RSTP
- C. MEC
- D. ECMP
Answer: C
NEW QUESTION # 133
A customer is discussing QoS requirements with a network consultant. The customer has specified that endto- end path verification is a requirement. Which QoS solution meets this requirement?
- A. DiffServ model with PHB to support the traffic flows
- B. IntServ model with RSVP to support the traffic flows
- C. marking traffic at the access layer with CoS to support the traffic flows
- D. marking traffic at the access layer with DSCP to support the traffic flows
Answer: B
NEW QUESTION # 134
DRAG DROP
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.
Select and Place:
Answer:
Explanation:
Explanation:
In a dial-in mode, the destination initiates a session to the router and subscribes to data to be streamed. Dial-in 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.
Reference:
https://www.cisco.com/c/en/us/td/docs/iosxr/asr9000/telemetry/b-telemetry-cg-asr9000-61x/b-telemetry-cg- asr9000-61x_chapter_010.html#id_36445
NEW QUESTION # 135
Which method does Cisco SD-WAN use to avoid fragmentation issues?
- A. PMTUD is used.
- B. Access circuits are configured with 1600 byte MTU settings.
- C. Traffic is marked with the DF bit set.
- D. Jumbo frames are enabled.
Answer: A
Explanation:
Explanation
https://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise-networks/sd-wan/nb-06-cisco-sd-wan-ebook-c
NEW QUESTION # 136
In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?
- A. vManage or DNS records
- B. ZTP or manual configuration
- C. DHCP options or manual configuration
- D. DNS records or DHCP options
Answer: B
NEW QUESTION # 137
An engineer uses Postman and YANG to configure a router with:
OSPF process ID 400
network 192.168.128.128/25 enabled for Area 0
Which get-config reply verifies that the model set was designed correctly?
- A.
- B.
- C.
- D.
Answer: C
NEW QUESTION # 138
Which two statements describe source trees in a multicast environment? (Choose two.)
- A. Source trees can create suboptimal paths between the source and the receivers
- B. Source trees create an optimal path between the source and the receivers
- C. Source trees can introduce latency in packet delivery
- D. Source trees use a single common root placed at some chosen point in the network
- E. Source trees guarantee the minimum amount of network latency for forwarding multicast traffic
Answer: B,E
Explanation:
Section: Network Services
NEW QUESTION # 139
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 # 140
An engineer must propose a QoS architecture model that allows an application to inform the network of its traffic profile and to request a particular type of service to support its bandwidth and delay requirements. The application requires consistent and dedicated bandwidth end to end. Which QoS architecture model meets these requirements?
- A. LLQ
- B. DiffServ
- C. WRED
- D. IntServ
Answer: D
Explanation:
Section: Network Services
NEW QUESTION # 141
An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from sources in another AS. Which feature must the design include?
- A. Bidirectional PIM
- B. Anycast RP
- C. MSDP
- D. SSM
Answer: B
Explanation:
https://learningnetwork.cisco.com/s/question/0D53i00000KsrGrCAJ/rendezvous-point-high-availability-mechanisms
NEW QUESTION # 142
A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?
- A. Aggressive OSPF timers
- B. LFA FRR
- C. BFD
- D. Incremental SPF
Answer: D
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-incre-spf.pdf
NEW QUESTION # 143
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Cisco 300-420 exam is a challenging certification exam that requires a deep understanding of network design principles and Cisco technologies. Candidates who pass 300-420 exam will be well-equipped to design and implement complex enterprise networks, and will be one step closer to obtaining the highly valued CCDE certification.
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