[Mar 22, 2025] Get Free Updates Up to 365 days On Developing 300-420 Braindumps [Q130-Q148]

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[Mar 22, 2025] Get Free Updates Up to 365 days On Developing 300-420 Braindumps

Best Quality Cisco 300-420 Exam Questions

NEW QUESTION # 130
What statement is true regarding the current time in Enterprise Networking history?

  • A. advent of IoT
  • B. pervasive use of mobile devices
  • C. advent of cloud computing
  • D. technology pace of change

Answer: D


NEW QUESTION # 131
What is the purpose of a control plane node in a Cisco SD-Access network fabric?

  • A. to maintain the endpoint database and mapping between endpoints and edge nodes
  • B. to detect endpoints in the fabric and inform the host tracking database of EID-to-fabric-edge node bindings
  • C. to identify and authenticate endpoints within the network fabric
  • D. to act as the network gateway between the network fabric and outside networks

Answer: A

Explanation:
Endpoint registration-Each edge node has a LISP control-plane session to all control plane nodes. After an endpoint is detected by the edge node, it is added to a local database called the EID-table. Once the host is added to this local database, the edge node also issues a LISP map- register message to inform the control plane node of the endpoint so the central HTDB is updated.
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html


NEW QUESTION # 132
An existing network solution is using BFD in echo mode. Several of the network devices are experiencing high CPU utilization which an engineer has determined is related to the BFD feature. Which solution should the engineer leverage to reduce the CPU load?

  • A. Implement BED asynchronous mode between peers with low CPU resources.
  • B. Utilize carrier delay on all routers in the network.
  • C. Implement slow timers between peers with low CPU resources.
  • D. Enable BFD multi-hop on the devices with low CPU resources.

Answer: C


NEW QUESTION # 133
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. Configure a higher mac-refresh interval on both HSRP devices
  • B. Use the preempt delay feature on the backup HSRP device
  • C. Increase the hello timers on both HSRP devices
  • D. Use the preempt delay feature on the primary HSRP device.

Answer: D


NEW QUESTION # 134
Refer to the exhibit.

An architect must design an IPv6 migration solution for an enterprise customer to support these requirements:
* Clients will transition to the new IPv6 network, which provides NAT64 and IPv6 DNS resolution services, using the same DNS name that points to the IPv4 address.
* The service provider will create a client-facing IPv6 interface with a new IPv6 virtual address that points to the same IPv4 DNS server.
* The service provider will support clients that use global IPv6 addresses and encapsulate IPv4 packets into IPv6 tunnels.
Which two migration solutions must the architect choose? (Choose two.)

  • A. Use IPv6 tunneling from the devices to the core MPLS network.
  • B. Use NAT44/64 from the MPLS network to the IGR.
  • C. Use dual-stack lite from the devices to the core MPLS network.
  • D. Use NAT44/64 from the devices to the core MPLS network.
  • E. Use dual-stack lite from the MPLS network to the IGR.

Answer: B,C


NEW QUESTION # 135
Which topology within a network underlay eliminates the need for first hop redundancy protocols while improving fault tolerance, increasing resiliency, and simplifying the network?

  • A. virtualized topology
  • B. routed access topology
  • C. logical fabric topology
  • D. Layer 2 topology

Answer: B

Explanation:
In this solution, the access layer switches act as default gateways and participate in routing, and there is no need for an FHRP.


NEW QUESTION # 136
In Cisco SD-Access, virtual networks create segmentation that allows for separation of users and resources. How is this type of segmentation described?

  • A. micro
  • B. stretched
  • C. inter-VN
  • D. macro

Answer: D


NEW QUESTION # 137
Drag and Drop Question
Drag and drop the descriptions from the left onto the categories they apply to on the right.

Answer:

Explanation:


NEW QUESTION # 138
Refer to the exhibit.

A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic. Which solution should the design include?

  • A. Use AS-Path prepending on R3.
  • B. Modify the next-hop attribute on R3.
  • C. Use AS-Path prepending on R4.
  • D. Modify the next-hop attribute on R4.

Answer: C


NEW QUESTION # 139
An engineer is designing a BGP network for a large customer. To permit efficient scaling, the BGP domain is split into clusters. Which peering solution should be used between the route reflectors in different clusters for the BGP routes to be propagated appropriately?

  • A. The route reflectors should not have any kind of BGP peering.
  • B. The route reflectors should be nonclients with regards to each other.
  • C. The route reflectors should have peering through another nonclient router.
  • D. The route reflectors should be made dents of each other.

Answer: B

Explanation:
Explanation
When configure multi-cluster of BGP RRs, RRs should peer with each RR as non-client according to CCIE routing TCP/IP volumn 2 @2001 page 127
- if the route was learned from nonclient IBGP peer, it is reflected to client only (here RR's route learnt from other RRs is able to reflect to its client)
- if the route was learned from a client, it is reflected to all nonclients and clients, except for the originating client. (routes learnt within the cluster can reflect to nonclient, RR)
- it the route was learnt from an EBGP peer, it is reflected to all nonclients and clients.


NEW QUESTION # 140

Refer to the exhibit. An engineer Is designing a multicampus Layer 3 Infrastructure using EIGRP as the routing protocol. The design must provide quick replies to queries In the event of a downlink, prevent unnecessary queries, and ensure that traffic does not unnecessarily transit the access layer. Which two actions must the engineer take for the network design? (Choose two.)

  • A. Configure core layer switches as stub routers.
  • B. Configure access layer switches to summarize routes to the distribution layer.
  • C. Configure access layer and core layer switches as stub routers.
  • D. Configure access layer switches as stub routers.
  • E. Configure distribution layer switches to summarize routes to the core layer.

Answer: D,E


NEW QUESTION # 141

Refer to the exhibit. An architect reviews the low-level design of a company's enterprise network and advises optimizing the STP convergence time. Which functionality must be to Gi1/0/1-10 to follow the architect's recommendation?

  • A. PortFast
  • B. root guard
  • C. UplinkFast
  • D. BPDU guard

Answer: A


NEW QUESTION # 142
Refer to the exhibit.

An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?

  • A. * Campus: 10.0.0.0/18
    * Branch1: 10.0.192.0/21
    * Branch2: 10.0.200.0/21
  • B. * Campus: 10.0.0.0/10
    * Branch1: 10.64.0.0/10
    * Branch2: 10.128.0.0/10
  • C. * Campus: 10.0.0.0/20
    * Branch1: 10.0.64.0/21
    * Branch2: 10.0.128.0/21
  • D. * Campus: 10.0.0.0/16
    * Branch1: 10.255.0.0/20
    * Branch2: 10.255.16.0/20

Answer: A


NEW QUESTION # 143
Refer to the exhibit. A network engineer must improve the current IS-IS environment. The Catalyst switch is equipped with dual supervisors. Each time a stateful switchover occurs, the network experiences unnecessary route recomputation. Which solution addresses this issue if the upstream router does not understand graceful restart messaging?

  • A. Enable IS-IS remote LFA FRR on both devices.
  • B. Enable NSR on the switch.
  • C. Configure ISIS aggressive timers on both devices.
  • D. Enable NSF on the switch.

Answer: B

Explanation:
NSF is also known as gracefull restart. And the router does not understand GR.


NEW QUESTION # 144
An engineer uses Postman and YANG to configure a router with:
OSPF process ID 400
network 192.168.128.128/25 enabled for Area 0
Which get-config reply verifies that the model set was designed correctly?

  • A.
  • B.
  • C.
  • D.

Answer: D


NEW QUESTION # 145
An engineer uses Postman and YANG to configure a router with:
* OSPF process ID 400
* network 192.168.128.128/25 enabled for Area 0
Which get-config reply verifies that the model set was designed correctly?

  • A. Text Description automatically generated
  • B. Text Description automatically generated
  • C. Text Description automatically generated
  • D. Text Description automatically generated with medium confidence

Answer: C


NEW QUESTION # 146
An organization plans to deploy multicast across two different autonomous systems. Their solution must allow RPs to:
* discover active sources outside their domain
* use the underlying routing information for connectivity with other RPs
* announce sources joining the group
Which solution supports these requirements?

  • A. SSM
  • B. PIM-DM
  • C. MSDP
  • D. PIM-SM

Answer: C

Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-3s/asr903/imc-pim-xe-3s-asr903-book/imc_msdp.pdf


NEW QUESTION # 147
Which is a function of the Proactive Insights feature of Cisco DNA Center Assurance?

  • A. enabling you to see the complete path of packets from the client to the end application
  • B. enabling you to quickly view all of the contextual information related to a single user
  • C. generating synthetic traffic to perform tests that raise awareness of potential network issues
  • D. pointing out where the most serious issues are happening in the network

Answer: C


NEW QUESTION # 148
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