Valid 300-420 Exam Q&A PDF 300-420 Dump is Ready (Updated 348 Questions) [Q102-Q119]

5/5 - (1 vote)

Valid 300-420 Exam Q&A PDF 300-420 Dump is Ready (Updated 348 Questions)

Exam Questions and Answers for 300-420 Study Guide

NEW QUESTION 102
Refer to the exhibit.

Refer to the exhibit A customer wants to adopt a dynamic site-to-site VPN solution to secure communication for VoIP, video, and FTP traffic between the remote branches and the headquarters. The customer also wants the branches to communicate directly, thereby reducing traffic at the headquarters location. The solution must consider that the branch routers are limited in available memory. Which VPN solution meets these requirements?

DMVPN Phase 2 Hub and Spoke design

DMVPN Phase 3 Hub and Spoke design

DMVPN Phase 1 Hub and Spoke design

DMVPN Phase 3 Hierarchical design

NEW QUESTION 103
Which two statements describe source trees in a multicast environment? (Choose two.)

Source trees guarantee the minimum amount of network latency for forwarding multicast traffic

Source trees create an optimal path between the source and the receivers

Source trees use a single common root placed at some chosen point in the network

Source trees can introduce latency in packet delivery

Source trees can create suboptimal paths between the source and the receivers

Section: Network Services

NEW QUESTION 104
Drag and drop the elements from the left onto the protocols where they are used on the right.

Explanation
Graphical user interface, application Description automatically generated

NEW QUESTION 105
Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.

NEW QUESTION 106
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?

Implement slow timers between peers with low CPU resources.

Implement BED asynchronous mode between peers with low CPU resources.

Enable BFD multi-hop on the devices with low CPU resources.

Utilize carrier delay on all routers in the network.

NEW QUESTION 107
An engineer must design a QoS solution for a customer that is connected to an ISP over a 1Gbps link with a
100Mbps CIR. The ISP aggressively drops all traffic received over which is causing numerous TCP retransmissions. The customer is not using any RTP applications but wants to maximize bandwidth usage up to the CIR. Which QoS solution engineer choose?

Policing

Traffic shaping

Policer with markdown

Queuing

Explanation
https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645-policevsshape.html

NEW QUESTION 108

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?

R1 has no route to R2 and drops the traffic

R1 load-balances across the paths through R3 and R4 to reach R2

R1 forwards the traffic to R3, but R3 drops the traffic

R1 forwards the traffic to R3 in order to reach R2

NEW QUESTION 109
When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?

encapsulation of traffic with GRE or VTI

IPsec forwarding using transport mode

additional bandwidth for headend

IPsec forwarding using tunnel mode

NEW QUESTION 110
How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?

Fabric edge nodes update the HTDB based on CAPPWAP messaging from the AP

Fabric WLCs update the HTDB as new clients connect to the wireless network

Border nodes first register endpoints and then update the HTDB

Fabric APs update the HTDB with the clients’ ElD and RLOC

NEW QUESTION 111
Refer to the exhibit. A network engineer is designing an OSPF solution to connect a company’s remote to a newly provisioned MPLS VPN backbone. Some of the branches have a direct dark fiber connection between each other. The engineer wants to ensure that the dark fibers are used only when the MPLS core is unavailable.
Which solution must the engineer choose?

Stub area

Sham link

Virtual link

NSSA

Explanation
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe-16/iro-xe-16-book/iro-sham-lin

NEW QUESTION 112

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?

both routers running EIGRP

one router running OSPFv2 and other OSPF v3

one router running ISIS and other OSPF v3

both routers running OSPFv2

Explanation
EIGRP has a function called “EIGRP Ipv6” (But that can still be called “EIGRP”)

NEW QUESTION 113
Which PIM mode uses a shared tree only?

bidirectional

sparse

dense

source-specific

NEW QUESTION 114
Drag and drop the properties from the left onto the protocols they describe on the right.

NEW QUESTION 115
Refer to the exhibit.

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?

PortFast

root guard

UplinkFast

BPDU guard

NEW QUESTION 116
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?

Enable IS-IS remote LFA FRR on both devices.

Enable NSR on the switch.

Enable NSF on the switch.

Configure ISIS aggressive timers on both devices.

NEW QUESTION 117
When a network is designed using IS-IS protocol, which two circuit types are supported? (Choose two.)

nonbroadcast multiaccess

multiaccess

point-to-multipoint

nonbroadcast

point-to-point

Section: Advanced Addressing and Routing Solutions

NEW QUESTION 118
Refer to the exhibit. A network engineer must design a highly available OSPF solution based on these requirements:
– Traffic disruptions caused by link or node failures in Area-1 must be resolved in milliseconds.
– In the event of a failure, traffic must switch to another path
without waiting for the OSPF dead interval.
Which fault detection solution must the engineer choose?

Decrease SPF timers to 100 ms.

Tune the SPF delay and the OSPF LSA interval timers to 100 ms.

Utilize BFD and tune the BFD timers to 100 ms.

Enable IP SLA tracking for each OSPF peer.

NEW QUESTION 119
An engineer must design a QoS solution for a customer. The network currently supports data only, but the customer will roll out VoIP and IP video in conjunction with the new QoS solution. The engineer plans to use DiffServ. To ensure priority for voice services, which model must the design include?

8-class model

4-class model

6-class model

12-class model

Loading …