Authentic 300-420 Dumps - Free PDF Questions to Pass
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Cisco 300-420 exam, also known as Designing Cisco Enterprise Networks (ENSLD), is a professional-level certification exam that validates your skills and knowledge in designing enterprise-level network solutions. 300-420 exam is designed for network engineers, architects, and designers who are responsible for designing and implementing complex enterprise networks.
Cisco 300-420 exam is a vendor-neutral certification that is recognized globally. Designing Cisco Enterprise Networks certification is an excellent way for IT professionals to demonstrate their expertise in network design and implementation using Cisco technologies. 300-420 exam is also an excellent way for IT professionals to advance their careers and increase their earning potential.
NEW QUESTION # 183
Which nonproprietary mechanism can be used to automate rendezvous point distribution in a large PIM domain?
- A. Auto-RP
- B. Embedded RP
- C. Static RP
- D. BSR
Answer: D
NEW QUESTION # 184
Refer to the exhibit.
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 OSPFv2 and other OSPF v3
- B. one router running ISIS and other OSPF v3
- C. both routers running OSPFv2
- D. both routers running EIGRP
Answer: D
Explanation:
EIGRP has a function called "EIGRP Ipv6" (But that can still be called "EIGRP")
NEW QUESTION # 185
What are two advantages of the Cisco SD-WAN technology? (Choose two.)
- A. proactive network management
- B. easier deployment
- C. consistent connectivity
- D. optimized cloud connectivity
- E. improved application experience
Answer: D,E
NEW QUESTION # 186
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.
Answer: C
Explanation:
Floating static routes are static routes that are used to provide a backup path to a primary static or dynamic route, in the event of a link failure.
NEW QUESTION # 187
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. Add more interfaces to R1 and R2.
- B. Enable RSTP on the downstream switches.
- C. Configure port channel toward downstream switches.
- D. Make router R2 active for half of the VLANs.
Answer: D
NEW QUESTION # 188 
Refer to the exhibits. An engineer is troubleshooting an issue in which the Gig0/2 interface on a Cisco switch named SW2 fails to become the root port. Which two commands must be run on SW2 to resolve this issue?
(Choose two.)
- A.
- B.
- C.
- D.
- E.
Answer: B,E
NEW QUESTION # 189
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. MEC
- C. RSTP
- D. ECMP
Answer: B
NEW QUESTION # 190
Drag and drop the properties from the left onto the protocols they describe on the right.
Answer:
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/ b_166_programmability_cg_chapter_01011.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 # 191
Which feature minimizes TLOC connections and reduces strain on the vSmart controller in an SD-WAN architecture?
- A. control-direction
- B. color
- C. affinity
- D. control-connections
Answer: C
NEW QUESTION # 192 
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 core toward the aggregation and the access toward the aggregation
- C. from the aggregation toward the access and the access toward the aggregation
- D. from the aggregation toward the core and the aggregation toward the access
Answer: D
NEW QUESTION # 193 
Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)
- A. use multiple unequal-cost links
- B. use HSRP
- C. use multiple equal-cost links
- D. use RPVSTP+
- E. use an IGP
Answer: C,E
NEW QUESTION # 194
Which element of the Cisco SD-WAN architecture facilitates the functions of controller discovery and NAT traversal?
- A. vEdge
- B. vBond orchestrator
- C. vSmart controller
- D. vManage
Answer: B
NEW QUESTION # 195
Which control plane protocol is responsible for EID-to-RLOC mapping concerning SD-Access Architecture?
- A. LISP
- B. CEF
- C. VXLAN
- D. GBAC
Answer: A
NEW QUESTION # 196
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. BFD
- C. Next-hop address tracking
- D. Aggressive timers
Answer: B
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html
NEW QUESTION # 197
Refer to the exhibit.
EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?
- A. R1 forwards the traffic to R3 in order to reach R2
- B. R1 forwards the traffic to R3, but R3 drops the traffic
- C. R1 has no route to R2 and drops the traffic
- D. R1 load-balances across the paths through R3 and R4 to reach R2
Answer: A
NEW QUESTION # 198
An engineer must design a multicast network for a financial application.
Most of the multicast sources also receive multicast traffic (many-to-many deployment model).
To better scale routing tables, the design must not use source trees.
Which multicast protocol satisfies these requirements?
- A. BIDIR-PIM
- B. PIM-SSM
- C. MSDP
- D. PIM-SM
Answer: A
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.
https://www.cisco.com/c/dam/en/us/products/collateral/ios-nx-os-software/multicast- enterprise/prod_white_paper0900aecd80310db2.pdf
NEW QUESTION # 199
An engineer is designing a PIM Anycast RP solution between two data centers. The design must ensure that RP1 in DC1 and RP2 in DC2 inform each other about specific sources that have joined locally. Which solution must the engineer choose?
- A. Provision the RPs on the same IP subnet and extend the subnet at Layer 2 between data centers
- B. Enable MSDP between RPs using the configured Anycast RP address
- C. No action is required because PIM registers from the source will, by default, reach each RP
- D. Enable MSDP between RPs using separate unique loopback interfaces
Answer: D
Explanation:
Explanation
In Anycast RP, two or more RPs are configured with the same IP address on loopback interfaces. The Anycast RP loopback address should be configured with a 32-bit mask, making it a host address. All the downstream routers should be configured to "know" that the Anycast RP loopback address is the IP address of their local RP. IP routing automatically will select the topologically closest RP for each source and receiver.
MSDP used for Anycast RP is an intradomain feature that provides redundancy and load-sharing capabilities.
Enterprise customers typically use Anycast RP for configuring a Protocol Independent Multicast sparse mode (PIM-SM) network to meet fault tolerance requirements within a single multicast domain.
https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/White_papers/anycast.html#wp1029118
https://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/115011-anycast-pim.html
" You need to have a loopback on each prospective RP router, which is different than the loopback that is being used as the RP address."
NEW QUESTION # 200 
Refer to the exhibit A customer requires maximum uptime for the data plane between R1 and R3 running OSPF Which solution must the design include for high availability if the routing process on R2 requires maintenance?
- A. BFD on all routers
- B. nonstop forwarding on R1 and R3
- C. graceful restart on all routers
- D. nonstop forwarding on R3 only
Answer: C
NEW QUESTION # 201
Refer to the exhibit.
An architect is designing a routing solution for a company. The new design will add a circuit routers C and D to protect against loss of connectivity to 10.0.4.0/24 during a link failure between routers B and D. Which solution must the architect choose?
- A. Stub receive-only
- B. Stub connected
- C. Stub redistributed
- D. Stub leak-map
Answer: B
NEW QUESTION # 202
Which two best practices must be followed when designing an out-of-band management network? (Choose two.)
- A. Facilitate network integration
- B. Back up data using the management network
- C. Ensure network isolation
- D. Ensure that the management network is a backup to the data network
- E. Enforce access control
Answer: C,E
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Security/SAFE_RG/SAFE_rg/chap9.html
NEW QUESTION # 203 
Refer to the exhibit. An architect is designing a network that requires route redistribution. The design must prevent route feedback and the creation of routing loops. The OSPF domain is using default metrics, and the IS-IS domain is using narrow metrics. Which solution must the architect select?
- A. Change the OSPF area to a nonbackbone stub area
- B. Use route tagging with a route map.
- C. Change the IS-IS administrative distance to 105.
- D. Use route filtering with an ACL or prefix list.
Answer: B
NEW QUESTION # 204
Which consideration must be made when designing a Cisco SD-Access fabric underlay?
- A. A unified policy must be used.
- B. The default MTU should be increased.
- C. Subnets must be reduced to decrease latency.
- D. Up to six control planes are supported.
Answer: D
NEW QUESTION # 205
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Cisco 300-420 exam tests the candidates' abilities to design and implement advanced enterprise-level network solutions using technologies such as virtualization, automation, security, and network assurance. 300-420 exam also covers topics related to network design methodologies, network services, and network topology. 300-420 exam is intended for network architects, network engineers, and other IT professionals who are responsible for designing and implementing enterprise-level networks.
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