300-420 by Cisco Valid Free Exam Practice Test

Question 1

A router running ISIS is showing high CPU and bandwidth utilization.
An engineer discovers that the router is configured as L1/L2 and has L1 and L2 neighbors.
Which step optimizes the design to address the issue?

A. Configure the router to be either L1 or L2 B. Disable the default behavior of advertising the default route on the L1/L2 router C. Make this router a DIS for each of the interfaces D. Configure each interface as either L1 or L2 circuit type

Correct Answer: D

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Question 2

What are two advantages of the Cisco SD-WAN technology? (Choose two.)

A. optimized cloud connectivity B. easier deployment C. improved application experience D. consistent connectivity E. proactive network management

Correct Answer: A,C

Question 3

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

Correct Answer: C

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. STP C. Rapid PVST D. RSTP

Correct Answer: A

Question 5

Refer to the exhibit. A company architect proposed this network design as a part of the IPv6 migration strategy. What are two advantages of this design? (Choose two.)

A. It establishes an independent network that does not share fate with the underlay. B. It allows multiple independent networks to be built on top of a shared underlay. C. It permits any number of devices to join the overlay network seamlessly. D. It enables the transport of protocols that are unsupported by the underlay. E. It provides increased scalability without increasing forwarding overhead.

Correct Answer: B,D

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Question 6

Which queuing structure is used on SD-WAN Edge routers?

A. FIFO B. 1P-4Q-2T C. LLQ+WRR D. Priority

Correct Answer: C

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Question 7

A company wants to enable several third-party video conferencing networks based on multicast services. The video conferencing platform can accommodate numerous and dispersed senders and receivers in third-party networks. The interior routing protocol is OSPF and the exterior routing protocol is BGP. Which multicast mode must be selected to achieve this goal?

A. Enable BIDIR-PIM B. Configure MS DP C. Set IGMPv2 D. Enable MP-BGP

Correct Answer: A

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Question 8

Which two techniques improve the application experience in a Cisco SD-WAN design? (Choose two.)

A. implementing Cisco Umbrella B. implementing AMP C. utilizing forward error correction D. utilizing quality of service E. implementing a stateful application firewall

Correct Answer: C,D

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Question 9

Which two overlay network design considerations must be made for a Cisco SD-Access network?
(Choose two.)

A. Reduce subnets and simplify DHCP management B. Avoid overlapping IP subnets C. LAN automation for deployment D. Layer 3 to the access design E. Dedicated IGP process for the fabric

Correct Answer: A,B

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Question 10

An engineer must choose a strategy to provide IPv6 connectivity for the ISP's IPv4 customers.
The ISP has a medium-size IT support team, so the deployment process must be simple and quick. In addition, the ISP wants to ensure the correct level of QoS and the reduction of potential security threats. Which strategy must the engineer choose?

A. NAT64 B. DS-Lite C. 6RD D. 6VPE

Correct Answer: B

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Question 11

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

A. nonbroadcast multiaccess B. nonbroadcast C. multiaccess D. point-to-point E. point-to-multipoint

Correct Answer: C,D

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Question 12

An architect must design a plan to manage the enterprise network devices. The design must accommodate that:
- not all network devices have a dedicated management interface
- all IP-enabled interfaces on all devices must be reachable
- encryption must be used with all devices which have support
Which solution must the architect choose?

A. terminal server B. in-band C. KYM server D. out-of-band

Correct Answer: B

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Question 13

How is redundancy achieved among Cisco vBond Orchestrators in a Cisco SD-WAN deployment?

A. The IP addresses of all Orchestrators are mapped to a single DNS name. B. The closest Orchestrator to each Cisco WAN Edge router is selected. C. A single Cisco Orchestrator is deployed in each network. D. Cisco WAN Edge routers are configured with all Orchestrators using their IP addresses and priority.

Correct Answer: A

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Question 14

Which Cisco product supports SD-Access and specifically built to address new challenges faced by enterprises?

A. Nexus 7700 w/ Sup2E and M3 line cards B. ASR 1000-HX C. Catalyst 9500 D. ISR 4221 E. CSRv virtual router F. Catalyst 6807-XL w/ Sup6T and C6800 10G line cards

Correct Answer: C

Question 15

Which WAN connectivity technology is optimal for edge computing compared to others and why?

A. Due to low cost, high bandwidth, low latency, and closest proximity to the edge of the network, Mero Ethernet is the optimal WAN technology for edge computing compared to MPLS, which offers native separation and security with close proximity to the data center. B. Due to low latency, high bandwidth, and closest proximity to the user, 4G/5G connectivity is the optimal WAN technology for edge computing compared to L3 VPN MPLS connectivity, which offers native separation and security with close proximity to the data center. C. Due to high bandwidth, separation and security, and proximity to the data center network, DWDM is the optimal WAN technology for edge computing compared to 4G/5G connectivity, which offers native separation and security with close proximity to the data center. D. Due to low latency, high bandwidth, and closest proximity to the user, L3 VPN MPLS connectivity is the optimal WAN technology for edge computing compared to 4G/5G connectivity, which offers native separation and security with close proximity to the data center.

Correct Answer: B

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Cisco Designing Cisco Enterprise Networks - 300-420 Exam Practice Test