[Apr-2026] 300-420 Dumps PDF - 300-420 Real Exam Questions Answers
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Cisco 300-420 exam is an essential certification for network professionals who are responsible for designing and implementing enterprise networks. 300-420 exam is a part of the Cisco Certified Design Professional (CCDP) certification, which is a globally recognized certification for network designers. The CCDP certification validates the skills required to design and implement complex network solutions in an enterprise environment.
Cisco 300-420 exam is an excellent certification for network architects, network engineers, and other IT professionals who are interested in designing and implementing enterprise networks. It is a challenging exam that requires a deep understanding of enterprise network design principles and best practices. However, by passing the exam, you will demonstrate your expertise in enterprise network design, which will help you advance your career and open up new opportunities in the IT industry.
NEW QUESTION # 89
Refer to the exhibit. The failover time of ISP-2 is significantly shorter than ISP-1 when an interface on the ISP router toward the campus network fails. Which solution minimizes the downtime to the sub-second?
- A. Graceful-restart
- B. Aggressive timers
- C. BFD
- D. Next-hop address tracking
Answer: C
Explanation:
BFD provides sub-second failure detection (https://howdoesinternetwork.com/2018/bfd), and next-hop tracking is enabled in IOS by default.
(https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html)
NEW QUESTION # 90
How do endpoints inside an SD-Access network reach resources outside the fabric?
- A. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network
- B. SD-Access transit links are used to transport encapsulated traffic from one fabric to another
- C. a VRF fusion router is used to map resources in one VN to another VN
- D. Fabric borders use VRFs to map VNs to VRFs
Answer: A
NEW QUESTION # 91
Which component is part of the Cisco SD-Access overlay architecture?
- A. spine node
- B. Cisco DNA Center
- C. leaf node
- D. border node
Answer: D
Explanation:
Border Node is part of the overlay.
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design- guide.html#OverlayNetwork
NEW QUESTION # 92
Which component of Cisco SD-Access integrates with Cisco DNA Center to perform policy segmentation and enforcement through the use of security group access control lists and security group tags?
- A. Cisco Network Data Platform
- B. Cisco Application Policy Infrastructure Controller Enterprise Module
- C. Cisco Identity Services Engine
- D. TrustSec
Answer: D
NEW QUESTION # 93
Drag and drop the characteristics from the left onto the YANG models they describe on the right. Not all options are used.
Answer:
Explanation:
Explanation
Diagram Description automatically generated
NEW QUESTION # 94
What is one function of the vSmart controller in an SD-WAN deployment?
- A. provides a data-plane at branch offices to pass traffic through the SD-WAN network
- B. orchestrates vEdge and cEdge connectivity
- C. responsible for the centralized control plane of the SD-WAN network
- D. provides centralized network management and a GUI to monitor and operate the SD-WAN overlay
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION # 95
When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)
- A. IGMPv2
- B. MSDP
- C. BIDIR-PIM
- D. MP-BGP
- E. MLD
Answer: B,D
NEW QUESTION # 96
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. violating
- B. conforming
- C. shaping
- D. marking
- E. bursting
Answer: A,B
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_plcshp/configuration/xe-3s/qos-plcshp-xe-3s-book/qos-p
NEW QUESTION # 97
When a first hop redundancy solution is designed, which protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?
- A. HSRP
- B. IRDP
- C. VRRP
- D. GLBP
Answer: D
NEW QUESTION # 98
Which control plane protocol is responsible for ElD-to-RLOC mapping concerning SO-Access Architecture?
- A. GBAC
- B. VXLAN
- C. LISP
- D. CEF
Answer: C
NEW QUESTION # 99
Which control-plane technology allows the same subnet to exist across multiple network locations?
- A. FabricPath
- B. VXLAN
- C. ISE mobility services
- D. LISP
Answer: B
Explanation:
Section: WAN for Enterprise Networks
NEW QUESTION # 100
Which information update is earned by OMP and enables the Cisco SD-WAN to build a secure overlay fabric on top of any public or private transport without regard for the actual link IP?
- A. DTLS
- B. RLOC
- C. TLOC
- D. LISP PITR
Answer: C
Explanation:
A TLOC route represents a WAN link that serves as a tunnel endpoint and is uniquely identified by {System-IP, Color, Encapsulation}. Note that the System IP address is used instead of the interface IP address as an identifier for a TLOC route. That's because the interface IP can change at any given moment. Using the fixed System-IP ensures that the TLOC can be uniquely identified at all times irrespective of any interface IP changes. This is very important because an OMP route (vRoute) has a next-hop pointing to a TLOC. This separation of information allows TLOC routes to be updated with new parameters without having to invalidate the dependent vRoutes. If a vEdge router has multiple transport interfaces connected to different WAN providers, as shown in figure 7, a TLOC route is created and advertised for each WAN interface.
DTLS or TLS provides communication privacy between Cisco SD-WAN devices in the network, using the Advanced Encryption Standard (AES-256) encryption algorithm to encrypt all control traffic sent over the connections.
https://www.networkacademy.io/ccie-enterprise/sdwan/omp-overview
NEW QUESTION # 101
Which two functions is the Cisco SD-Access Edge Node responsible for? (Choose two.)
- A. Advertise EID subnets
- B. Map users to virtual network
- C. Act as LISP proxy tunnel router
- D. Route and transport IP traffic
- E. Act as anycast layer 3 gateway
Answer: B,E
Explanation:
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#EdgeNode
NEW QUESTION # 102
Which design consideration should be observed when EIGRP is configured on Data Center switches?
- A. Prevent unnecessary EIGRP neighborships from forming across switch virtual interfaces.
- B. Configure multiple EIGRP autonomous systems to segment Data Center services and applications.
- C. Perform manual summarization on all Layer 3 interfaces to minimize the size of the routing table.
- D. Lower EIGRP hello and hold timers to their minimum settings to ensure rapid route reconvergence.
Answer: C
Explanation:
When EIGRP is used in the data center (DC), several design considerations are important.
Because DCs will have many different services, networks, and applications, you should design for summarizing data center subnets, just as you would do in wide-area networking. Furthermore, it is a good idea to advertise a default route into the DC from the aggregation layer. This way, you do not have to advertise all global network routes into the DC.
NEW QUESTION # 103 
Refer to the exhibit. An engineer must connect the IPv6 island to the IPv4-only network to provide IPv6 hosts access to file servers and DNS services in the IPv4 network. Which NAT should the engineer choose?
- A. static NAT-PT
- B. dynamic NAT-PT
- C. stateful NAT66
- D. stateless NAT66
Answer: B
NEW QUESTION # 104
Drag and drop the description from the left onto the corresponding WAN connectivity types and categories on the right.
Answer:
Explanation:
NEW QUESTION # 105
Drag and drop the descriptions from the left onto the corresponding VPN types on the rights.
Answer:
Explanation:
NEW QUESTION # 106
Refer to the exhibit.
Refer to the exhibit. The distribution switches serve as the layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?
- A. Use the preempt delay feature on the backup HSRP device
- B. Use the preempt delay feature on the primary HSRP device.
- C. Configure a higher mac-refresh interval on both HSRP devices
- D. Increase the hello timers on both HSRP devices
Answer: B
NEW QUESTION # 107
Which feature must be incorporated into the campus LAN design to enable Wake on LAN?
- A. directed broadcasts on layer 3 devices
- B. dynamic ARP Inspection Snooping on layer 2 devices
- C. DHCP Snooping on layer 2 devices
- D. proxy ARP on layer 3 devices
Answer: A
Explanation:
If you send WoL packets from remote networks, the routers must be configured to allow directed broadcasts.
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/91672-catl3- wol-vlans.html
NEW QUESTION # 108
When differentiating between IETF, OpenConfig, and Cisco native YANG models, how does the use of containers differ?
- A. OpenConfig uses one container for operational data and another container for configuration data, and IETF and Cisco native models use a single container for operational data and configuration data.
- B. Cisco native models use one container for operational data and another container for configuration data, and OpenConfig and IETF use a single container for operational data and configuration data.
- C. IETF and Cisco native models use one container for operational data and another container for configuration data, and OpenConfig uses a single container for operational data and configuration data.
- D. IETF and Cisco native models use a single container for operational data and configuration data, and OpenConfig uses one container for operational data and another container for configuration data.
Answer: C
NEW QUESTION # 109
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