300-420 Exam - Designing Cisco Enterprise Networks (ENSLD)

NEW QUESTION 1
Which design consideration should be observed when EIGRP is configured on Data Center switches?

• A. Perform manual summarization on all Layer 3 interfaces to minimize the size of the routing table.
• B. Prevent unnecessary EIGRP neighborships from forming across switch virtual interfaces.
• C. Lower EIGRP hello and hold timers to their minimum settings to ensure rapid route reconvergence.
• D. Configure multiple EIGRP autonomous systems to segment Data Center services and applications.

Answer: A

NEW QUESTION 2
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.

• A. Mastered
• B. Not Mastered

Answer: A

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 3
Drag and drop the properties from the left onto the protocols they describe on the right.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 4
An engineer is designing an enterprise campus network. The LAN infrastructure consists of switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop prevention mechanism. All configured VLANs must be grouped in two SIP instances. Which standards-based Spanning Tree technology supports this design solution?

• A. MSTP
• B. RSTP
• C. Rapid PVST
• D. STP

Answer: A

NEW QUESTION 5
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. GLBP
• B. IRDP
• C. VRRP
• D. HSRP

Answer: A

NEW QUESTION 6
A network engineer must connect two sites across a public network using a secure tunneling technology that supports multicast traffic. Which technology must be chosen?

• A. IPsec
• B. GRE
• C. PPTP
• D. GRE over IPsec

Answer: D

NEW QUESTION 7
Which method will filter routes between EIGRP neighbors within the same autonomous system?

• A. distribute-list
• B. policy-based routing
• C. leak-map
• D. route tagging

Answer: A

NEW QUESTION 8
A company with multiple service providers wants to speed up BGP convergence time in the event a failure occurs with their primary link. Which approach achieves this goal and does not impact router CPU utilization?

• A. Utilize BFD and tune the multiplier to 50
• B. Lower the BGP hello interval
• C. Decrease the BGP keepalive timer
• D. Utilize BFD and keep the default BGP timers

Answer: C

NEW QUESTION 9
When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?

• A. encapsulation of traffic with GRE or VTI
• B. IPsec forwarding using transport mode
• C. additional bandwidth for headend
• D. IPsec forwarding using tunnel mode

Answer: A

NEW QUESTION 10
An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?

• A. Native
• B. IEEE
• C. OpenConfig
• D. IETF

Answer: D

NEW QUESTION 11
Which control-plane technology allows the same subnet to exist across multiple network locations?

• A. LISP
• B. VXLAN
• C. FabricPath
• D. ISE mobility services

Answer: B

NEW QUESTION 12
An engineer is designing a QoS policy that queues excess packets for later transmission. Which mechanism must be included in the design?

• A. shaping
• B. WRED
• C. policing
• D. RED

Answer: A

NEW QUESTION 13
Which two steps can be taken to improve convergence in an OSPF network? (Choose two.)

• A. Use Bidirectional Forwarding Detection
• B. Merge all the areas into one backbone area
• C. Tune OSPF parameters
• D. Make all non-backbone areas stub areas
• E. Span the same IP network across multiple areas.

Answer: CD

NEW QUESTION 14
When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)

• A. IGMPv2
• B. BIDIR-PIM
• C. MP-BGP
• D. MSDP
• E. MLD

Answer: CD

NEW QUESTION 15
Which two BGP features will result in successful route exchanges between eBGP neighbors sharing the same AS number? (Choose two.)

• A. advertise-best-external
• B. bestpath as-path ignore
• C. client-to-client reflection
• D. as-override
• E. allow-as-in

Answer: DE

NEW QUESTION 16
Which two routing protocols allow for unequal cost load balancing? (Choose two.)

• A. EIGRP
• B. IS-IS
• C. BGP
• D. OSPF
• E. RIPng

Answer: AC

NEW QUESTION 17
An enterprise customer has these requirements:
end-to-end QoS for the business-critical applications and VoIP services based on CoS marking.
flexibility to offer services such as IPv6 and multicast without any reliance on the service provider.
support for full-mesh connectivity at Layer 2.
Which WAN connectivity option meets these requirements?

• A. VPWS
• B. MPLS VPN
• C. DMVPN
• D. VPLS

Answer: D

NEW QUESTION 18
Which solution allows overlay VNs to communicate with each other in an SD-WAN Architecture?

• A. External fusion routers can be used to map VNs to VRFs and selectively route traffic between VRFs.
• B. GRE tunneling can be configured between fabric edges to connect one VN to another.
• C. SGTs can be used to permit traffic from one VN to another.
• D. Route leaking can be used on the fabric border nodes to inject routes from one VN to another.

Answer: B

NEW QUESTION 19
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. DiffServ
• B. LLQ
• C. WRED
• D. IntServ

Answer: D

NEW QUESTION 20
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

Answer: D

NEW QUESTION 21
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. IntServ model with RSVP to support the traffic flows
• B. DiffServ model with PHB to support the traffic flows
• C. marking traffic at the access layer with DSCP to support the traffic flows
• D. marking traffic at the access layer with CoS to support the traffic flows

Answer: A

NEW QUESTION 22
Which NETCONF operation creates filtering that is specific to the session notifications?

• A. <create-subscription>
• B. <commit>
• C. <notification>
• D. <logging>

Answer: A

NEW QUESTION 23
Company A recently acquired another company. Users of the newly acquired company must be able to access a server that exists on Company A’s network, both companies use overlapping IP address ranges. Which action conserves IP address space and provides access to the server?

• A. Use a single IP address to create overload NAT
• B. Use a single IP address to create a static NAT entry
• C. Build one-to-one NAT translation for every user that needs access
• D. Re-IP overlapping address space in the acquired company

Answer: A

NEW QUESTION 24
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