Cisco 300-420 Dumps
| Exam Code | 300-420 |
| Exam Name | Designing Cisco Enterprise Networks (ENSLD) v1.1 |
| Update Date | 29 Aug, 2026 |
| Total Questions | 379 Questions Answers With Explanation |
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Question # 1
An engineer working for a service provider with an employee ID: 4863:43:939 must designa solution to provide remote connectivity over the public internet. The design must:securely connect multiple remote sites to the central siteprovide redundant paths to the central siteallow auto path selection based on failure and connection qualitysupport IP multicastminimal configuration at remote sitesWhich solution must the engineer choose?
A. MPLS provided service with BGP
B. dual DMVPN with EIGRP routing
C. full mesh OSPF with IPsec tunnels
D. full mesh ISIS with GRE tunnels and IPsec
Question # 2
An engineer is designing a Layer 3 campus network running EIGRP between the core,aggregation, and access layers. The access layer switches will be connected to theaggregation layer using Layer 3 copper connections. The engineer wants to improveconvergence time for access layer switch failures. Which technique must the designinclude?
A. enabling BFD for EIGRP on the access layer uplinks
B. reducing the EIGRP Hello / Hold timer values
C. EIGRP summarization from core to aggregation layer
D. EIGRP summarization from access to aggregation layer
Question # 3
How do endpoints inside an SD-Access network reach resources outside the fabric?
A. a VRF fusion router is used to map resources in one VN to another VN
B. Fabric borders use VRFs to map VNs to VRFs
C. SD-Access transit links are used to transport encapsulated traffic from one fabric
to another
D. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then
transported over the outside network
Question # 4
An existing network solution is using BFD in echo mode. Several of the network devicesare experiencing high CPU utilization which an engineer has determined is related to theBFD feature. Which solution should the engineer leverage to reduce the CPU load?
A. Implement slow timers between peers with low CPU resources.
B. Implement BED asynchronous mode between peers with low CPU resources.
C. Enable BFD multi-hop on the devices with low CPU resources.
D. Utilize carrier delay on all routers in the network.
Question # 5
An engineer must establish a direct connection between two remote offices. The newconnection must be established using a logical path, share a common broadcast domain,connect over private WAN, and have as little overhead as possible. Which technology mustthe engineer choose?
A. L2VPN
B. GET VPN
C. IPsec
D. GRE
Question # 6
An engineer must design a multicast network for a financial application. Most of themulticast sources also receive multicast traffic (many-to-many deployment model). Tobetter scale routing tables, the design must not use source trees. Which multicast protocolsatisfies these requirements?
A. PIM-SSM
B. PIM-SM
C. MSDP
D. BIDIR-PIM
Question # 7
How is redundancy achieved among Cisco vBond Orchestrators in a Cisco SD-WANdeployment?
A. The IP addresses of all Orchestrators are mapped to a single DNS name.
B. The closest Orchestrator to each Cisco WAN Edge router is selected.
C. Cisco WAN Edge routers are configured with all Orchestrators using their IP addresses
and priority.
D. A single Cisco Orchestrator is deployed in each network.
Question # 8
A customer requires QoS to support multimedia conferencing over MPLS. The networkarchitect chooses to use per-hop behavior. Which solution must the architect use to classifyand mark traffic traveling between branch sites?
A. BW Queue and DSCP WRED with DSCP AF3
B. BW Queue with DSCP AF3
C. BW Queue and DSCP WRED with DSCP AF4
D. BW Queue with DSCP AF4
Question # 9
A network engineer must connect two sites across a public network using a securetunneling technology thatsupports multicast traffic. Which technology must be chosen?
A. IPsec
B. GRE
C. PPTP
D. GRE over IPsec
Question # 10
Which OSPF area blocks LSA Type 3, 4 and 5, but allows a default summary route?
A. normal
B. stub
C. NSSA
D. totally stubby
Question # 11
Which two considerations must be made regarding the overlay network for a Cisco SDAccess architecture? (Choose two.)
A. Virtual networks should be used for microsegmentation
B. SGTs should be used for data plane isolation and microsegmentation
C. Virtual networks should be used for data plane isolation only
D. Overlapping IP addresses across different overlay networks should be used to conserve
IP addresses
E. Overlapping IP addresses across different overlay networks should be avoided for
operational simplicity
Question # 12
What is the purpose of the fabric control plane in a Cisco SD-Access architecture?
A. create, propagate, and enforce G6AC policies in the fabric
B. create a transit node with BGP route reflector functionality
C. extend multiple subnets to one RLOC
D. create and resolve endpoint-to-location mapping
Question # 13
Which two routing protocols allow for unequal cost load balancing? (Choose two.)
A. EIGRP
B. IS-IS
C. BGP
D. OSPF
E. RIPng
Question # 14
A customer reports that each time a networking component fails, OSPF recalculates thebackup path, with causes a short outage. Which solution must the customer implement toimprove this situation?
A. Aggressive OSPF timers
B. LFA FRR
C. Incremental SPF
D. BFD
Question # 15
An engineer must design a solution to provide backup connectivity between two sites. Theengineer plans to use an Internet connection but company policy requires the connection tobe encrypted. Additionally, there are several applications that utilize multicast to delivervideo streams between the sites. Which technology should the design include?
A. GRE over IPsec
B. IPsec direct encapsulation
C. GETVPN
D. DMVPN
Question # 16
A company uses cloud-based applications for voice and video calls, file sharing, contentsharing, and messaging. During business hours, these applications randomly become slowand unresponsive. However, other applications work smoothly with the current applied QoSpolices. Which solution must the company choose to resolve the issue?
A. Identify the applications with NBAR2 and allocate the required bandwidth accordingly.
B. Identify the port used by each application and apply a minimum bandwidth guarantee.
C. Identify the applications and reserve the required bandwidth on the perimeter routers.
D. Identify the application ports, create groupings, and rate-limit the required bandwidth.
Question # 17
An engineer must connect a new remote site to an existing OSPF network. The new siteconsists of two low-end routers, one for WAN, and one for LAN. There is no demand fortraffic to pass through this area. Which area type does the engineer choose to provideminimal router resources utilization, while still allowing for full connectivity to the rest of thenetwork?
A. not so stubby
B. totally not so stubby
C. totally stubby area
D. stubby area
Question # 18
Which node performs the LISP Map-Server and Map-Resolver functions in the Cisco SDAccess network architecture?
A. control plane node
B. fabric edge node
C. border node
D. intermediate node
Question # 19
A company is using OSPF between its HQ location and a branch office. HQ is assignedarea 0 and the branch office is assigned area 1. The company purchases a second branchoffice, but due to circuit delays to HQ, itdecides to connect the new branch office to the creating branch office as a temporarymeasure. The new branch office is assigned area 2. Which OSPF configuration enables allthree locations to exchange routes?
A. The existing branch office must be configured as a stub area
B. A virtual link must be configured between the new branch office and HQ
C. A sham link must be configured between the new branch office and HQ
D. The new branch office must be configured as a stub area
Question # 20
An enterprise needs to enhance its WAN availability after a recent outage with its onlyMPLS provider. The proposed solution must have a quick deployment, be affordable, bereliable, and work as a backup for the enterprise's primary MPLS connection. Whichsolution 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.
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