[Q51-Q72] Get up-to-date Real Exam Questions for 300-420 UPDATED [2022]

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Get up-to-date Real Exam Questions for 300-420 UPDATED [2022]

Pass Cisco 300-420 Exam in First Attempt Guaranteed

Advanced Enterprise Campus Networks

This part makes up 25% of the whole content and measures the professionals’ knowledge of specific technical areas. These include the following:

Explaining overlay, underlay, security, automation, wireless, control & data plan of SD-Access architecture;
Explaining the considerations for the SD-Access fabric design for wired and wireless access. These include fabric design, overlay, border design, control plan design, segmentation, as well as scalability, multicast, virtual networks, and over-the-top & fabric for wireless.
Designing the infrastructures for multicampus Layer 3 (route summarization, convergence, VRFs, load sharing, redistribution, route filtering, and optimal topologies);
Designing the campus network for high availability, including BFD, first-hop redundancy protocols, Graceful restart, and platform abstraction methods;
Designing the infrastructures for campus Layer 2, such as fast convergence, PoE & WoL, STP scalability, and loop-free technologies;

Q51. Refer to the exhibit. An architect must design a solution to connect the network behind R3 with the EIGRP network. Which mechanism should be included to avoid routing loops?

split-horizon

summarization

down bit

route tags

Q52. What is the function of the multicast Reverse Path Forwarding check?

It allows for a loop-free distribution tree from the source to receivers.

It serves as an Auto RP Mapping agent.

It prevents bootstrap messages from reaching all routers.

It is used to discover and announce RP-set information.

Q53. An engineer is designing a QoS policy that queues excess packets for later transmission. Which mechanism must be included in the design?

shaping

WRED

policing

RED

Q54. Refer to the exhibit. Where must an architect plan for route summarization for the topology?

from the core toward the aggregation and the access toward the aggregation

from the core toward the aggregation and the aggregation toward the core

from the aggregation toward the access and the access toward the aggregation

from the aggregation toward the core and the aggregation toward the access

Q55. Refer to the exhibit.

An architect must design an IGP solution for an enterprise customer. The design must support:
Physical link flaps should have minimal impact.
Access routers should converge quickly after a link failure.
Which two ISIS solutions should the architect include in the design? (Choose two.)

Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.

Advertise the IS-IS interface and loopback IP address toward the Internet and data center.

Reduce SPF and PRC intervals to improve convergence time.

Configure all access and aggregate routers to establish Level 1 / Level 2 adjacencies across the network.

Configure access routers to establish a Level 1 adjacency and aggregate routers to establish a Level 1 / Level 2 adjacency.

Q56. Refer to the exhibit. An IPv6 network was just deployed in the environment and the help desk has reported that R3 is not able to SSH to R2’s Loopback interface. Which sequence number of the filter is preventing access?

Q57. Refer to the exhibit.
C0FD9 F48C9ACDC725EA850EC2476EE1E

An architect must design a solution that uses the direct link between R1 and R2 for traffic from 10.10.10.0/24 toward network 10.10.20.0/24. Which solution should the architect include in the design?

Configure the OSPF cost of the link to a value lower than 30.

Lower the Administrative Distance for OSPF area 0.

Place the link into area 2 and install a new link between R1 and R2 in area 0.

Configure the link to provide multiarea adjacency.

Q58. In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

DHCP options or manual configuration

vManage or DNS records

ZTP or manual configuration

DNS records or DHCP options

Q59. An engineer must design a solution to connect a customer to the Internet. The solution will include a Layer 3 circuit with a CIR of 50 Mbps from the service provider. The hand-off from the provider’s switch to the customer’s router is 1Gbps. Which solution should the engineer include to prevent potential issues with choppy voice traffic?

Reduce the bandwidth of the connection to the router.

Implement hierarchical QoS with a parent policing policy.

Implement hierarchical QoS with a parent shaping policy.

Add a bandwidth statement to the router interface.

Q60. A customer’s current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch. An architect must redesign the Layer 2 domain to achieve these goals:

reduce the impact of topology changes

reduce the time spent on network administration

reduce manual configuration errors

Q61. An engineer must propose a solution for a campus network that includes the capability to create multiple Layer
3 virtual networks. Each network must have its own addressing structure and routing table for data forwarding.
The solution must be scalable to support hundreds of virtual networks and allow simple configuration and management with minimal administrative overhead. Which solution does the engineer recommend?

hop-by-hop EVN

multihop MPLS core

multihop IPsec tunneling

hop-by-hop VRF-Lite

Q62. 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 the aggregation layer using Layer 3 copper connections. The engineer wants to improve convergence time for access layer switch failures. Which technique must the design include?

enabling BFD for EIGRP on the access layer uplinks

reducing the EIGRP Hello / Hold timer values

EIGRP summarization from core to aggregation layer

EIGRP summarization from access to aggregation layer

Q63. Drag and drop the characteristics from the left onto the Yang model they describe on the right.

Q64. An engineer is looking for a standards-driven YANG model to manage a multivendor network environment.
Which model must the engineer choose?

Native

OpenConfig

IETF

IEEE NETCONF

Q65. An infrastructure team is concerned about the shared memory utilization of a device, and for this reason, they need to monitor the device state. Which solution limits impact on the device and provides the required data?

IPFIX

static telemetry

on-change subscription

periodic subscription

Q66.

Refer to the exhibit. The full EIGRP routing table is advertised throughout the network. Currently, users experience data loss when any one link in the network fails. An architect optimizes the network to reduce the impact when a link fails. Which solution should the architect include in the design?

Run BFD on the inter links between EIGRP neighbors.

Summarize the access layer networks from each access layer switch toward the aggregation layer.

Reduce the default EIGRP hello interval and hold time.

Summarize the access layer networks from the aggregation layer toward the core layer.

Q67.

Refer to the exhibit. An architect must design a solution to connect the network behind R3 with the EIGRP network. Which mechanism should be included to avoid routing loops?

split-horizon

summarization

down bit

route tags

Q68. In what mode does an LWAPP-enabled access point operate?

lightweight mode

autonomous mode

WGB

ad hoc mode

Lightweight access point protocol (LWAPP)-enabled access points operate in lightweight mode. LWAPP is a protocol used to allow centralized management of APs. The management components are removed from the APs, and a WLAN controller provides a single point of management. This controller coordinates WLAN access, managing the load on the APs and user movement between APs. Upon starting, an LWAPP-enabled access point must obtain an IP address. It can then discover the controller using DHCP, DNS, or a subnet broadcast. When multiple wireless controllers are detected by an AP, it chooses to associate with the controller that has the fewest existing associated APs.
Individually configured APs that operate without central management are operating in autonomous mode. This would be the opposite of lightweight mode, which is made possible by LWAPP. Autonomous access points can be upgraded to lightweight. If they are upgraded, they will only function in conjunction with a WLAN controller.
Moreover, when an autonomous access point is upgraded to lightweight, the console port only provides read access to the unit.
Characteristics that autonomous and lightweight access points have in common:
Both support Power over Ethernet (PoE)
Both can use a Cisco Secure Access Control server (ACS) for security
A wireless gateway bridge (WGB) is used to connect a computer without a wireless network card to a wireless network, but not separate WLANs. The WGB can connect up to eight computers to a WLAN. The WGB connects to the root AP through a wireless interface.
Ad hoc is a WLAN mode used for peer-to-peer connectivity. Ad hoc mode allows wireless-enabled computers to communicate with each other without having an AP involved.
Objective:
Layer 2 Technologies
Sub-Objective:
Configure and verify other LAN switching technologies
References:
Cisco > Support > Product Support > Wireless > Cisco Aironet 1200 Series > Reference Guides > Technical References > Upgrading Autonomous Cisco Aironet Access Points to Lightweight Mode Cisco > Support > Technology Support > Wireless/Mobility > Wireless, LAN (WLAN) > Design > Design Technotes > Cisco Wireless Devices Association Matrix

Q69. A network solution is being designed for a company that connects to multiple Internet service providers. Which Cisco proprietary BGP path attribute will influence outbound traffic flow?

Local Preference

MED

Weight

AS Path

Community

Q70. A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?

dual stack

6VPE

6to4

NAT64

Q71. In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

DHCP options or manual configuration

vManage or DNS records

ZTP or manual configuration

DNS records or DHCP options

Q72.

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?