CCNA Cisco Certified Network Associate Free Practice Test — 30 Questions

Question 1

Consider a network where Router A is configured to run both OSPF and EIGRP simultaneously to reach a remote network, Network X. Router A has two potential paths to Network X: one through Router B, which involves two 100 Mbps links (one from A to B, and one from B to X), and another through Router C, involving two 10 Mbps links (one from A to C, and one from C to X). Assuming default EIGRP K-values and OSPF cost calculations, which path will Router A select as its preferred route to Network X, and why?

Accepted Answer

The path through Router B, because EIGRP's lower administrative distance and its metric favoring higher bandwidth links will be used.

Question 2

Anya, a network administrator, is tasked with optimizing the routing efficiency between several VLANs in a large enterprise network. While she is mid-way through implementing a new OSPF tuning strategy, the Chief Information Security Officer (CISO) mandates an immediate, accelerated deployment of a new network-wide intrusion detection system (IDS) due to a credible threat intelligence report. This new IDS deployment requires significant configuration changes across core network devices and will temporarily divert resources and attention from Anya\'s original routing optimization project. Which of the following behavioral competencies is Anya most demonstrating if she successfully re-prioritizes her tasks, collaborates with the security team to integrate the IDS, and communicates the revised project timeline to her manager?

Accepted Answer

Adaptability and Flexibility

Question 3

Consider a network engineer configuring Weighted Fair Queuing (WFQ) on a Cisco router interface to manage traffic for different applications. The configuration assigns weights to three distinct traffic classes: Class Alpha with a weight of 10, Class Beta with a weight of 5, and Class Gamma with a weight of 2. If the interface experiences heavy congestion and all three classes are actively transmitting data, which traffic class would be least susceptible to significant queuing delays due to the WFQ algorithm\'s proportional allocation strategy?

Accepted Answer

Class Alpha

Question 4

A network engineer, Anya, is implementing a Quality of Service (QoS) policy on a Cisco router to prioritize VoIP traffic. She has configured Class-Based Weighted Fair Queuing (CBWFQ) to allocate a guaranteed bandwidth percentage to the voice class. However, users are reporting significant call quality degradation, characterized by jitter and packet loss, despite the allocated bandwidth. Analysis of the router\'s interface statistics shows that while the voice class is receiving its allocated bandwidth, the queues are experiencing occasional drops. Anya needs to revise her QoS strategy to address this issue effectively.

Which of the following QoS mechanisms, when implemented in conjunction with or as a modification to her current CBWFQ strategy, would most effectively mitigate the reported jitter and packet loss for VoIP traffic?

Accepted Answer

Implementing Low Latency Queuing (LLQ) for the voice traffic class to ensure strict priority servicing.

Question 5

Anya, a network administrator, is troubleshooting intermittent performance issues with a newly deployed cloud-based collaboration suite. Users report inconsistent audio and video quality, characterized by latency spikes and packet loss that seem to occur randomly. Initial diagnostics have eliminated client-side issues and basic network connectivity problems. Anya suspects that the existing Quality of Service (QoS) policies on the internal network are not adequately accommodating the unique traffic characteristics of the cloud application, which utilizes a variety of UDP ports and has fluctuating bandwidth demands. Which of the following actions would be the most effective initial step for Anya to take to diagnose and potentially resolve this issue, demonstrating a proactive and analytical approach to network optimization?

Accepted Answer

Implement a new QoS policy that classifies and prioritizes the cloud collaboration traffic using LLQ for voice components and CBWFQ for data, ensuring sufficient bandwidth allocation during peak hours.

Question 6

Anya, a network administrator for a bustling e-commerce platform, is alerted to a complete network failure precisely at the start of a major flash sale. Customer orders are halted, and the company is losing significant revenue per minute. Anya must quickly diagnose the issue, implement a solution, and keep stakeholders informed, all while the pressure mounts from all departments. Which of Anya\'s behavioral competencies is most paramount in this immediate, high-stakes scenario?

Accepted Answer

Crisis Management

Question 7

A network administrator is tasked with designing a secure campus network for a financial institution. The requirement is to isolate sensitive financial transaction data from general user access and to provide a separate, limited access network for visitors. The administrator must ensure that only authorized personnel and systems can access the financial data, while also maintaining connectivity for general business operations and guest Wi-Fi. Which combination of network technologies and configuration strategies would best achieve this objective while adhering to modern network design principles for security and segmentation?

Accepted Answer

Implement distinct VLANs for finance, general users, and guests, coupled with inter-VLAN routing configured with granular Access Control Lists (ACLs) to permit specific traffic flows to and from the finance VLAN.

Question 8

Anya, a network administrator, is troubleshooting intermittent packet loss and high latency affecting a remote branch office\'s connection to the central data center. Initial checks of physical and data link layers on the edge router and WAN link reveal no apparent issues. Layer 3 routing protocols are functioning correctly. Upon further investigation, Anya discovers that the recent deployment of a new Voice over IP (VoIP) service has not been adequately accommodated in the existing network traffic management strategy. The VoIP traffic, highly sensitive to delay and jitter, is being negatively impacted by the current configuration. Which of the following actions would be the most effective in resolving this performance degradation for the VoIP service while maintaining overall network stability?

Accepted Answer

Implement a hierarchical Quality of Service (HQoS) policy with Low Latency Queuing (LLQ) for VoIP traffic and Weighted Fair Queuing (WFQ) for other traffic classes, ensuring adequate bandwidth allocation for real-time communication.

Question 9

A network administrator, Anya, is tasked with implementing a critical new security protocol across a legacy infrastructure. The project involves significant configuration changes on core network devices and requires the team to learn and adopt new operational procedures. Some team members express reservations due to the learning curve and potential disruption to existing workflows, while strict industry compliance mandates must be met. Which of the following behavioral competencies is most essential for Anya to effectively lead this initiative and ensure successful adoption, considering the potential for unforeseen technical hurdles and evolving project requirements?

Accepted Answer

Adaptability and Flexibility

Question 10

Anya, a network engineer, was meticulously configuring a new Quality of Service (QoS) policy for a remote branch office, aiming to optimize traffic flow for VoIP and video conferencing. Suddenly, an urgent alert is broadcasted across the IT department detailing a zero-day vulnerability in a core routing protocol affecting network stability and security across the entire enterprise. The directive is to immediately halt all non-critical tasks and begin emergency patching and configuration validation for all network devices. Anya\'s current QoS configuration is now secondary to this critical security imperative. Which of the following best exemplifies Anya\'s appropriate response, demonstrating key behavioral competencies relevant to advanced network operations?

Accepted Answer

Anya immediately ceases her QoS work, communicates the critical security situation and her shift in focus to her team lead, and begins researching the specific patch details and developing a phased remediation plan for the network devices, while also identifying potential impacts on other ongoing projects.

Question 11

Anya, a network administrator, is tasked with deploying a critical security update across a geographically dispersed network comprising diverse Cisco hardware models, including some older devices. The project has an extremely tight deadline with substantial financial penalties for extended downtime. Her team members possess varying degrees of familiarity with the new protocol, and several key individuals are working remotely, complicating real-time collaboration. Considering the potential for unforeseen technical challenges and the need for rapid, coordinated action, which set of behavioral competencies would be most instrumental for Anya to effectively lead her team through this complex deployment?

Accepted Answer

Adaptability and Flexibility, Leadership Potential, and Teamwork and Collaboration

Question 12

Anya, a network administrator, is leading her team through a sudden, widespread network failure that has paralyzed critical customer support functions. Initial diagnostics are yielding contradictory results, and team members are independently pursuing different troubleshooting paths, leading to a lack of coordinated effort and increasing frustration. What immediate, behaviorally-aligned action should Anya take to most effectively guide her team through this crisis and expedite service restoration?

Accepted Answer

Implement a strict, centralized incident command structure with a single point of communication for all team updates and diagnostic findings, and then conduct a rapid team sync to assign focused troubleshooting tasks based on current hypotheses.

Question 13

Anya, a seasoned network administrator, is spearheading the transition of her company\'s critical infrastructure from a traditional on-premises data center to a hybrid cloud environment. The existing network infrastructure is showing signs of strain, leading to unpredictable latency for key business applications. Anya\'s team possesses deep expertise in established networking protocols but has minimal practical experience with cloud-native services and orchestration tools. During the planning phase, several team members express apprehension about adopting new methodologies and potential job role shifts. Anya needs to guide her team through this significant technological and operational change, ensuring minimal disruption to business continuity while fostering a proactive and collaborative atmosphere.

Which of the following strategic approaches best aligns with Anya\'s need to demonstrate adaptability, leadership potential, and effective problem-solving in this complex migration scenario?

Accepted Answer

Implement a phased migration strategy, beginning with non-critical services to allow the team to gain practical experience with cloud technologies, coupled with targeted training programs and establishing clear communication channels for addressing team concerns and fostering collaborative problem-solving.

Question 14

Anya, a network administrator for a growing enterprise, is facing network congestion issues impacting the performance of real-time applications. She needs to implement a Quality of Service (QoS) policy on a Cisco router\'s egress interface to ensure that Voice over IP (VoIP) traffic and video conferencing streams are prioritized over bulk data transfers. The goal is to minimize latency and jitter for these critical applications, even when the interface is experiencing heavy utilization. Which combination of QoS mechanisms would be most effective in achieving this objective on a Cisco IOS router?

Accepted Answer

Implement Low-Latency Queuing (LLQ) for VoIP traffic and Class-Based Weighted Fair Queuing (CBWFQ) for video conferencing traffic, both with allocated bandwidth percentages, while treating bulk data transfers with a lower priority queue.

Question 15

Anya, a network administrator, is spearheading the migration of a critical legacy authentication service to a modern, cloud-native platform. The legacy system is notoriously difficult to integrate with external services due to its proprietary nature and lack of standardized APIs. During a team meeting, a senior engineer, Boris, expresses significant reservations, citing potential security vulnerabilities and the perceived complexity of the new system, which he believes could disrupt ongoing operations. Anya needs to effectively manage this situation, ensuring the project progresses while maintaining team cohesion and addressing valid technical concerns. Which of the following actions best exemplifies Anya\'s required blend of adaptability, leadership, and communication skills in this scenario?

Accepted Answer

Anya proactively schedules a series of one-on-one technical deep-dive sessions with Boris, focusing on demonstrating the new platform's security features, providing detailed migration risk assessments, and collaboratively exploring phased implementation strategies to address his specific concerns about operational disruption.

Question 16

Anya, a network administrator, is tasked with implementing a new Quality of Service (QoS) policy across a complex and not fully documented network to prioritize Voice over IP (VoIP) traffic. The existing infrastructure has a history of intermittent performance issues, and stakeholders are concerned about potential service disruptions during the reconfiguration. Anya must ensure that VoIP traffic receives preferential treatment during peak usage times while maintaining overall network stability. Which of the following strategic approaches best demonstrates adaptability, effective communication, and proactive problem-solving in this scenario?

Accepted Answer

Implement the QoS policy in stages, starting with a pilot group of users or a non-critical network segment, coupled with thorough pre-change analysis and immediate post-change monitoring and validation, with a clear rollback plan in place.

Question 17

Anya, a network administrator, was leading the implementation of a new internal communication system, a project with a clearly defined roadmap and timeline. Mid-way through the deployment, a critical zero-day vulnerability is discovered in the company\'s public-facing e-commerce platform, posing an immediate and significant risk to customer data. The executive team has mandated that all available IT resources be redirected to mitigate this vulnerability. Which core behavioral competency is Anya primarily demonstrating if she successfully reorients her team and resources to address the security threat, ensuring minimal disruption to other critical operations while keeping stakeholders informed of the revised focus?

Accepted Answer

Adaptability and Flexibility

Question 18

Anya, a network administrator for a mid-sized ISP, is alerted to a complete service outage affecting a major enterprise client\'s critical e-commerce platform. Initial reports are vague, citing \"network failure.\" The client is experiencing significant financial losses and is demanding immediate updates and a firm resolution time. Anya’s team is already stretched thin with routine maintenance. What approach best demonstrates adaptability, leadership potential, and effective problem-solving in this high-stakes, ambiguous situation?

Accepted Answer

Initiate a systematic, layered troubleshooting process, simultaneously communicating progress and estimated resolution times to the client in clear, non-technical terms, while delegating specific diagnostic tasks to available team members based on their expertise.

Question 19

Anya, a network administrator, is tasked with upgrading a critical segment of the company\'s network infrastructure to implement a newly mandated, robust encryption standard. This upgrade requires a phased rollout across several customer-facing routers, necessitating firmware updates and stringent configuration changes. Anya must ensure minimal disruption to ongoing services while also preparing a clear, concise communication plan for the customer support team to relay to affected clients. Which core behavioral competency is most critical for Anya to effectively manage this transition and mitigate potential client impact?

Accepted Answer

Adaptability and Flexibility

Question 20

During a critical business period, Anya, a network administrator, is alerted to a complete network service interruption. Initial diagnostics reveal that a recently implemented Access Control List (ACL) modification on a core router appears to be the cause. Her team is experiencing high stress due to the business impact, and various suggestions are being proposed, including extensive packet captures, immediate hardware replacement, and a complete network reboot. Anya must quickly decide on the most effective course of action to restore connectivity with minimal further disruption.

Accepted Answer

Revert the recently applied ACL configuration to its last known stable state.

Question 21

Anya, a network administrator for a growing enterprise, is configuring Quality of Service (QoS) on a Cisco ISR router to prioritize Voice over IP (VoIP) traffic. She implements a QoS policy that classifies and marks VoIP packets and then applies a queuing mechanism. Shortly after deployment, users report intermittent and unacceptable latency for the VoIP service, even though the overall link utilization is not consistently at its maximum capacity. Anya suspects the queuing strategy might not be adequately protecting the voice traffic from the impact of less critical data flows that are intermittently heavy. Which queuing strategy, when configured to reserve a minimum bandwidth percentage for the VoIP traffic class, would most effectively address this issue by ensuring consistent performance for the real-time application?

Accepted Answer

Class-Based Weighted Fair Queuing (CBWFQ) with strict priority queuing for VoIP traffic

Question 22

Anya, a network operations lead, has been guiding her team through the phased rollout of a new intrusion detection system. Midway through the implementation, a critical, time-sensitive network performance bottleneck has been identified, directly impacting a major upcoming product launch. Senior management has mandated that the performance issue be resolved before further progress is made on the security project. Anya must now quickly reorient her team\'s efforts. Which of the following behavioral competencies is most directly demonstrated by Anya\'s need to manage this abrupt shift in strategic focus and operational demands?

Accepted Answer

Adaptability and Flexibility

Question 23

A network administrator, Anya, is tasked with optimizing voice quality on a busy branch office router where unpredictable file transfer volumes often lead to packet drops and degraded VoIP performance. She needs to implement a solution that guarantees voice packets receive preferential treatment during periods of network congestion, ensuring clear conversations and minimizing latency for real-time communication. Which QoS mechanism is most critical for achieving this specific objective of prioritizing voice traffic over other data streams when the network is operating at or near its capacity?

Accepted Answer

Implementing a strict priority queue for voice traffic.

Question 24

Anya, a network administrator for a growing enterprise, is troubleshooting a persistent, yet intermittent, packet loss issue affecting a remote branch office\'s connection to the central data center. She has already confirmed that all local network devices and user workstations within the branch office are functioning correctly and are not the source of the problem. The issue appears to be occurring somewhere along the Wide Area Network (WAN) link connecting the branch to the main site. To effectively diagnose and isolate the cause of this intermittent packet loss, which of the following actions would be the most direct and informative step to take?

Accepted Answer

Execute a traceroute to the central data center's IP address from a workstation at the branch office to identify the specific hop experiencing packet loss or high latency.

Question 25

Anya, a network engineer leading a critical infrastructure upgrade, is notified of a newly discovered zero-day vulnerability affecting a core component of the planned network architecture. This vulnerability requires immediate patching and potential re-configuration of several network segments before the planned upgrade can proceed. The project timeline is extremely tight, and the client has already expressed concerns about potential delays. Anya\'s team is composed of individuals with varying levels of experience and is currently working on different aspects of the upgrade.

Which of the following strategies would best enable Anya to effectively manage this evolving situation, maintaining project momentum and team morale?

Accepted Answer

Immediately halt all ongoing upgrade tasks, convene an emergency team meeting to collaboratively re-evaluate the project scope and priorities based on the new vulnerability, and then communicate a revised, phased approach to stakeholders, prioritizing the security remediation alongside critical upgrade components.

Question 26

Anya, a network engineer at a high-frequency trading firm, is tasked with upgrading a critical network segment that supports 50 active hosts. The existing infrastructure utilizes a /24 subnet mask for private IP addressing, but the new hardware mandates the use of /26 subnet masks for optimal performance and feature utilization. The firm anticipates a 15% growth in hosts within this segment over the next year. Anya must devise a strategy that ensures minimal service disruption while adhering to the new subnetting requirements. Which of the following actions best demonstrates adaptability and effective problem-solving in this scenario?

Accepted Answer

Re-subnet the existing /24 segment into multiple /26 subnets and migrate the hosts to a suitable new subnet.

Question 27

Anya, a network administrator, is troubleshooting a corporate network where users are experiencing significant degradation in video conference quality during peak operational hours. She has identified that bulk data transfers are consuming a disproportionate amount of bandwidth, leading to packet loss and increased latency for real-time communication. Anya needs to implement a Quality of Service (QoS) strategy on the edge router connecting the corporate LAN to the internet to ensure that video conferencing traffic receives preferential treatment and meets its service level objectives. Which of the following approaches best aligns with the fundamental principles of QoS for prioritizing real-time traffic in such a scenario?

Accepted Answer

Classify video conferencing traffic using ACLs, mark it with DSCP EF, and then implement a Low-Latency Queuing (LLQ) mechanism to ensure it is serviced first during congestion.

Question 28

Anya, a network administrator for a global enterprise, is assigned the urgent task of integrating a new, high-throughput VPN tunnel onto a legacy branch office router. The router\'s current configuration is largely undocumented, and the original network engineer who set it up is no longer with the company. The new VPN service is critical for enabling remote access for a significant portion of the workforce, and any downtime will have a substantial business impact. Anya must quickly understand the existing setup, implement the new VPN, and ensure seamless connectivity without disrupting current operations. Which of the following strategies best demonstrates Anya\'s adaptability and problem-solving skills in this high-pressure, ambiguous situation?

Accepted Answer

Conduct a comprehensive analysis of the existing router configuration, document all parameters, implement the new VPN in stages with rigorous testing after each change, and establish a rollback plan.

Question 29

Anya, a network engineer, was diligently working on optimizing Quality of Service (QoS) parameters for a large enterprise\'s voice over IP (VoIP) deployment, meticulously configuring strict priority queuing and weighted fair queuing to ensure seamless call quality. Suddenly, a critical out-of-band security alert is issued by the vendor, indicating a severe, exploitable vulnerability in the current firewall firmware that affects all network ingress points. The directive is to apply an emergency patch within 24 hours to mitigate the risk. Anya must immediately halt the QoS work and focus on the security patching and subsequent verification of firewall rule integrity. Which behavioral competency is Anya primarily demonstrating by effectively re-prioritizing her tasks and shifting her technical focus to address the critical security issue?

Accepted Answer

Adaptability and Flexibility

Question 30

Anya, a network architect, is leading a critical initiative to transition a company\'s core network infrastructure from a traditional, hardware-centric model to a software-defined networking (SDN) architecture integrated with a hybrid cloud environment. During a team meeting, a senior engineer, Mr. Henderson, expresses significant apprehension regarding the proposed SDN controller\'s security posture and the perceived complexity of managing cloud-based network services, advocating for a more gradual, incremental approach to familiar technologies. Considering Anya\'s role in fostering team cohesion and driving technological adoption, which of the following strategies best balances addressing Mr. Henderson\'s valid concerns with the project\'s strategic objectives and the need for efficient change management?

Accepted Answer

Schedule dedicated one-on-one sessions with Mr. Henderson to collaboratively review the SDN controller's security documentation and conduct hands-on labs demonstrating secure cloud network configurations, while also proposing a pilot phase for a non-critical network segment to showcase the benefits and operational stability of the new architecture before a full-scale rollout.

CCNA Cisco Certified Network Associate Free Practice Test — 30 Questions

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