[Oct-2021] 300-420 Dumps Full Questions - CCNP Enterprise Exam Study Guide
Exam Questions and Answers for 300-420 Study Guide
NEW QUESTION 54
Which design consideration must be made when using IPv6 overlay tunnels?
- A. Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.
- B. Overlay tunnels should only be considered as a transition technique toward a permanent solution.
- C. Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.
- D. Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.
Answer: C
NEW QUESTION 55
What is the purpose of an edge node in an SD-Access network fabric?
- A. Edge nodes identify and authenticate endpoints and register endpoint information with control plane nodes.
- B. Edge nodes are the gateway between the fabric domain and network outside of the fabric.
- C. Edge nodes track endpoint IDs to location mappings, along with IPv4, IPv6, or MAC addresses.
- D. Edge nodes resolve lookup requests from edge and border nodes to locate destination endpoint IDs.
Answer: A
NEW QUESTION 56
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. MSDP
- B. PIM-SM
- C. BIDIR-PIM
- D. PIM-SSM
Answer: B
Explanation:
Section: Network Services
NEW QUESTION 57
Refer to the exhibit. A customer needs to apply QoS to the network management traffic passing through the GigabitEthernet0/2 interface. All eight queuing classes are in use, so the new requirement must be integrated into the existing policy. Which solution must the customer choose?
- A. Mark the traffic to DSCP CS4 and assign it to the SIGNALLING class. Then, prioritize traffic within the class.
- B. Mark traffic to DSCP CS5 and assign it to the SIGNALLING class. Then, baseline existing queue sizes to determine if additional bandwidth can be provisioned to the SIGNALLING class.
- C. Mark the traffic to DSCP CS6 and assign it to the ROUTING class Then, prioritize traffic within the class.
- D. Mark the traffic to DSCP CS2 and assign it to the ROUTING class Then, baseline existing queue sizes to determine if additional bandwidth can be provisioned to the ROUTING class
Answer: D
NEW QUESTION 58 
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. Configure a higher mac-refresh interval on both HSRP devices
- B. Increase the hello timers on both HSRP devices
- C. Use the preempt delay feature on the backup HSRP device
- D. Use the preempt delay feature on the primary HSRP device.
Answer: D
NEW QUESTION 59
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. MSDP
- B. PIM-SM
- C. BIDIR-PIM
- D. PIM-SSM
Answer: C
NEW QUESTION 60
Which two statements about VRRP advertisements are true? (Choose two.)
- A. They are sent from the master router and standby routers.
- B. They are sent only from the master router.
- C. They are sent every three seconds by default.
- D. They include VRRP timer information.
- E. They include priority information.
Answer: A,E
NEW QUESTION 61 
Refer to the exhibit. The connection between SW2 and SW3 is fiber and occasionally experiences unidirectional link failure. An architect must optimize the network to reduce the change of layer2 forwarding loops when the link fails. Which solution should the architect include?
- A. Utilize loop guard on SW2
- B. Utilize 8PDU filter on SW3.
- C. Utilize root guard on SW1.
- D. Utilize BPDU guard on SW1
Answer: A
NEW QUESTION 62
Drag and drop the descriptions from the left onto the Cisco SD-WAN component they describe on the right.
Answer:
Explanation:
Explanation
Answer Area
is responsible for traffic forwarding, security, encryption, QoS,and routing protocols distributes routes and policy information via OMP enables centralized provisioning and simplifies network changes enables the communication of devices that sit behind NAT
NEW QUESTION 63 
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
- A. Make area 1 a standard OSPF area.
- B. Make area 1 a NSSA.
- C. Make area 1 a stub.
- D. Make the area 1 routers part of area 0.
Answer: C
NEW QUESTION 64 
Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?
- A. Configure route leaking on the router in area 1.
- B. Configure route filter on the router in area 4.
- C. Configure the high metric on the router in area 4.
- D. Configure route leaking on the router in area 2.
Answer: C
Explanation:
Section: WAN for Enterprise Networks
NEW QUESTION 65
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 has no route to R2 and drops the traffic
- C. R1 forwards the traffic to R3, but R3 drops the traffic
- D. R1 load-balances across the paths through R3 and R4 to reach R2
Answer: A
NEW QUESTION 66
A company must automate a set of complex changes aligned with DR testing in the network. These changes are specific, and the DR playbook will be adjusted in the future. The playbook has diverse routing and switching assets in scope as well as multiple vendor and hardware platforms. A developer will create a thin, web front-end microservice and integrate with an Open daylight controller to push changes to the network.
Which YANG model should be used?
- A. Develop an individualized YANG model to minimize development resources and time to market.
- B. Use a single native vendor YANG model to minimize development time
- C. Use an open YANG model to allow the reuse of code and standardize the implementation across platforms
- D. Use multiple native vendor YANG models to provide code consistency.
Answer: C
NEW QUESTION 67
Which two functions are provided by the Cisco SD-WAN orchestration plane? (Choose two.)
- A. Zero Touch Provisioning
- B. primary authentication point
- C. centralized provisioning
- D. NAT traversal facilitation
- E. troubleshooting and monitoring
Answer: B,D
NEW QUESTION 68 
Refer to the exhibit. Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal.
Which design provides optimal routing between both networks when the link between routers C and E fails?
- A. Create a tunnel between routers E and F in area 10.
- B. Make area 10 a not-so-stubby area.
- C. Move the link between routers C and D to area 10.
- D. Create an OSPF virtual link between routers E and F.
Answer: C
Explanation:
Section: Advanced Addressing and Routing Solutions
Explanation/Reference:
NEW QUESTION 69
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. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network
- D. SD-Access transit links are used to transport encapsulated traffic from one fabric to another
Answer: C
Explanation:
Section: Advanced Enterprise Campus Networks
NEW QUESTION 70
What are two benefits of designing an SD-WAN network fabric with direct Internet access implemented at every site? (Choose two.)
- A. It decreases latency to applications hosted by public cloud service provider.
- B. It increases the speed of delivery of site deployments through zero-touch provisioning.
- C. It decreases latency on Internet circuits.
- D. It alleviates network traffic on MPLS circuits.
- E. It increases the total available bandwidth on Internet circuits.
Answer: A,D
NEW QUESTION 71
An engineer must design an in-band management solution for a customer with branch sites. The solution must allow remote management of the branch sites using management protocols over an MPLS WAN. Queueing is implemented at the remote sites using these classes:
How must the solution prioritize the management traffic over the WAN?
- A. Mark the traffic with DSCP EF and map into Class1 with a minimum bandwidth assigned by reducing the bandwidth available to Class2.
- B. Mark the traffic with DSCP CS1 and map into Class2 with a minimum bandwidth assigned by reducing the bandwidth available to CIass3.
- C. Mark the traffic with DSCP CS6 and map into Class1 with a minimum bandwidth assigned by reducing the bandwidth available to Class2
- D. Mark the traffic with DSCP CS2 and map into Class2 with a minimum bandwidth assigned by reducing the bandwidth available to Class3
Answer: A
NEW QUESTION 72
Which design consideration must be made when using IPv6 overlay tunnels?
- A. Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.
- B. Overlay tunnels should only be considered as a transition technique toward a permanent solution.
- C. Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.
- D. Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.
Answer: B
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-ip4-gre-tunls-xe.pdf
NEW QUESTION 73
Refer to the exhibit.
An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access and the distribution layer?
- A. Create an EtherChannel link between distribution switch A and distribution switch B
- B. Change the link between distribution switch A and distribution switch B to be a routed link
- C. Add a link between access switch A and access switch B
- D. Reconfigure the distribution switch A to become the HSRP Active
Answer: D
NEW QUESTION 74
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