CCNA Cisco Certified Network Associate CCNA Free Practice Test — 30 Questions

Question 1

Anya, a network administrator for a growing e-commerce startup, is tasked with resolving intermittent network connectivity problems affecting client access to the company\'s web servers. After initial investigation, she suspects a misconfigured standard Access Control List (ACL) on the edge router, which might be too restrictive during periods of high traffic. Anya needs to approach this problem with a methodology that prioritizes minimal disruption while ensuring a robust solution. Which of the following approaches best reflects Anya\'s need to adapt her strategy based on the observed behavior of the ACL and demonstrate effective problem-solving under pressure?

Accepted Answer

Systematically analyze the ACL logic, test modifications in a simulated environment, and use packet captures to validate traffic flow, being prepared to revert or refine the changes based on observed results.

Question 2

Anya, a network engineer, is troubleshooting a connectivity issue for a remote site. She connects two Cisco Catalyst switches, Switch-Alpha and Switch-Beta, using a single Ethernet cable. On Switch-Alpha\'s interface, she configures the encapsulation to be 802.1Q and sets the trunking mode to \"dynamic desirable.\" On Switch-Beta\'s connected interface, she configures the encapsulation to be ISL and sets its trunking mode to \"dynamic auto.\" What is the most probable outcome for the link status and traffic flow between these two interfaces?

Accepted Answer

The link will establish as a non-trunking link, passing only traffic for the default VLAN, as the encapsulation mismatch prevents trunk negotiation.

Question 3

Anya, a network administrator, is overseeing the migration of a critical legacy application to a microservices-based architecture hosted in a multi-cloud environment. The primary concern is ensuring consistent application performance and reliable data exchange between distributed services and end-users, despite potential network fluctuations and varying latency. Anya needs to implement a network solution that can dynamically adapt to changing resource availability, prioritize critical application traffic, and simplify management across diverse cloud infrastructures. Which networking paradigm would best facilitate these requirements by enabling centralized control, policy-driven automation, and intelligent traffic steering?

Accepted Answer

Software-Defined Wide Area Networking (SD-WAN)

Question 4

Anya, a network administrator for a rapidly expanding tech firm, is responsible for deploying a new Cisco router into their core network. Company policy dictates a two-part security hardening process for all new devices: the default `enable` password must be replaced with a strong, randomized alphanumeric string of at least 12 characters, and a legally compliant advisory message stating that unauthorized access is prohibited must be displayed before any user can interact with the command-line interface. Anya must ensure these changes are persistent across device reboots. Which sequence of Cisco IOS commands, when executed from privileged EXEC mode, would correctly implement these requirements?

Accepted Answer

`enable secret ` followed by `banner motd #Unauthorized access to this network is strictly prohibited. All activities are logged.#` and then `copy running-config startup-config`

Question 5

Anya, a network engineer tasked with deploying a new enterprise-wide Quality of Service (QoS) policy, faces a scenario where initial network topology diagrams provided by a third-party vendor are found to be outdated. Simultaneously, a critical business unit suddenly prioritizes real-time voice traffic over existing data streams, necessitating an immediate recalibration of the QoS strategy. Anya must proceed with the deployment under these evolving conditions, ensuring minimal disruption to ongoing operations. Which of the following behavioral competencies is most prominently demonstrated by Anya\'s approach to managing this complex and fluid situation?

Accepted Answer

Adaptability and Flexibility

Question 6

Anya, a network administrator, is tasked with completing the optimization of routing tables for a new branch office by the end of the week. Suddenly, a critical zero-day vulnerability is announced, affecting a core network protocol used across the entire enterprise. The IT director immediately mandates that all available resources be redirected to assess and apply necessary security patches to mitigate this threat. Anya must now pause her routing optimization project to address the urgent security issue, potentially impacting the branch office deployment timeline. Which behavioral competency is Anya primarily demonstrating by immediately shifting her focus to the security vulnerability, even though it deviates from her assigned task?

Accepted Answer

Adaptability and Flexibility

Question 7

Anya, a network administrator for a growing e-commerce firm, is responsible for deploying a new, stringent encryption standard across the company\'s core network infrastructure. The current network has evolved organically over several years, resulting in a multifaceted and sometimes undocumented configuration. Anya anticipates potential compatibility issues and the need for phased implementation to avoid service interruptions. She has scheduled time for in-depth research into the new standard, plans to build a comprehensive lab environment to simulate the deployment, and intends to draft a detailed communication plan for IT and business stakeholders before any changes are made to the production network. Which combination of behavioral competencies is Anya most effectively demonstrating through these planned actions?

Accepted Answer

Adaptability and Flexibility, Initiative and Self-Motivation, Problem-Solving Abilities

Question 8

Anya, a network administrator, is implementing a new network segmentation strategy to enhance security. The initial rollout, based on a standard best-practice framework, encounters significant resistance and performance degradation on several critical, but older, server clusters. Despite extensive pre-deployment testing, the real-world impact on these specific systems was underestimated. Anya must now revise her approach to ensure both security and operational continuity. Which of the following behavioral competencies is Anya primarily demonstrating by successfully navigating this situation and achieving a functional, secure network?

Accepted Answer

Adaptability and Flexibility, coupled with Problem-Solving Abilities

Question 9

Anya, a network administrator, is implementing a new QoS policy to prioritize VoIP traffic during business hours. The development team expresses concerns that this might degrade the performance of their critical real-time data processing applications. Anya needs to adjust her strategy to accommodate these concerns while still achieving the primary QoS objective. Which behavioral competency is most critical for Anya to demonstrate in this situation to ensure a successful and collaborative outcome?

Accepted Answer

Adaptability and Flexibility

Question 10

Anya, a network administrator for a growing e-commerce firm, is implementing a new Quality of Service (QoS) strategy on a Cisco ISR router connecting to the internet. The primary goal is to ensure seamless real-time communication for their customer support VoIP system, especially during peak business hours when large file transfers are common. The interface\'s total available bandwidth is provisioned at 100 Mbps. Anya decides to configure Class-Based Weighted Fair Queuing (CBWFQ) to guarantee a minimum bandwidth allocation for voice traffic. She wants to ensure that voice packets consistently receive a minimum of 40% of the total interface bandwidth. What is the guaranteed minimum bandwidth allocated to the voice traffic class under these CBWFQ configurations?

Accepted Answer

40 Mbps

Question 11

Anya, a network administrator in a large, distributed organization, is investigating a report from Kenji, a remote employee, who states he cannot access any internal company servers despite his VPN client showing an active connection. Anya has already confirmed Kenji\'s VPN tunnel is established and has reviewed the client logs for obvious errors without success. Considering the decentralized nature of the organization and the fact that Kenji\'s local network is managed by an external provider, which of the following diagnostic steps would most efficiently help Anya isolate the root cause of Kenji\'s connectivity problem to internal resources?

Accepted Answer

Initiate a traceroute from Kenji's workstation through the VPN tunnel to a known internal server.

Question 12

Anya, a network administrator for a growing enterprise, is tasked with enforcing a new security directive. This directive mandates that all communication between end-user devices and the company\'s critical financial database server must be encrypted using an updated protocol that incorporates more robust key exchange algorithms. Additionally, the directive requires that before any device is granted access to the database server\'s subnet, it must first authenticate against the central identity management system to verify its authorization. Anya\'s current network consists of standard Layer 2 switches and user workstations. She needs to select the most effective and efficient strategy to meet these new requirements without a complete overhaul of the existing network infrastructure. Which of the following approaches would best satisfy both the internal traffic encryption mandate and the pre-access authentication requirement for the financial database server?

Accepted Answer

Deploy a dedicated security appliance positioned at the ingress point of the database server's subnet, configured to perform the required encryption/decryption and integrate with the identity management system for pre-access authentication.

Question 13

Anya, a network administrator, is rolling out a mandatory security update that requires a new authentication protocol. During implementation at the remote office in Oakhaven, users report intermittent network access failures. Initial diagnostics reveal that the new protocol\'s handshake process is incompatible with the firmware of some older network switches present in that specific branch. Anya\'s manager is demanding an immediate fix to restore full service. Which of the following approaches best exemplifies Anya\'s adaptability and problem-solving abilities in this situation, while also considering the broader implications of the security update?

Accepted Answer

Temporarily disable the new security protocol on all devices until a comprehensive firmware upgrade plan for the Oakhaven branch can be developed and executed.

Question 14

Anya, a network administrator at a growing tech firm, is tasked with implementing a Quality of Service (QoS) policy to ensure seamless voice communication across the company\'s branch offices. The objective is to prioritize Voice over IP (VoIP) traffic over less time-sensitive data streams during periods of network congestion. Anya has determined that the existing Cisco routers and switches support the Differentiated Services (DiffServ) model for QoS implementation. Considering the operational flow of DiffServ, what is the most crucial foundational step Anya must undertake to effectively prioritize VoIP traffic?

Accepted Answer

Accurately classifying and identifying VoIP packets based on predefined criteria.

Question 15

Anya, a network administrator for a burgeoning e-commerce startup, is tasked with maintaining a stable network infrastructure. Recently, users have reported sporadic periods of complete network unavailability, with no discernible pattern in the timing or affected services. Anya begins by examining the logs of the core switch, suspecting a hardware failure. After several hours of meticulous log review and port diagnostics, she finds no evidence of hardware malfunction on the switch. Recalling that the company recently expanded its office space and introduced a new subnet for a temporary project team, Anya hypothesizes that the issue might be related to inter-VLAN routing or a misconfigured firewall rule impacting the new subnet. She then proceeds to analyze the router\'s configuration, specifically focusing on the access control lists (ACLs) and the routing table entries for the newly added network segment. Upon discovering an overly restrictive ACL on the router that was inadvertently blocking legitimate traffic from the new subnet to the main network, Anya modifies the ACL to permit the necessary communication. Which combination of behavioral and technical competencies best describes Anya\'s approach to resolving this network issue?

Accepted Answer

Problem-Solving Abilities (analytical thinking, systematic issue analysis, root cause identification) and Adaptability and Flexibility (pivoting strategies when needed, openness to new methodologies)

Question 16

Anya, a network engineer, is leading a project to deploy a new, advanced intrusion detection system across the company\'s critical infrastructure. Her team, accustomed to legacy systems, expresses significant apprehension regarding the learning curve and potential disruption to their daily operations. Anya needs to foster adoption and ensure a smooth transition. Which of Anya\'s actions would best demonstrate leadership potential and teamwork skills in this context?

Accepted Answer

Conducting a series of hands-on workshops to familiarize the team with the new system, actively soliciting their feedback on the training content, and delegating specific configuration tasks based on individual strengths.

Question 17

Anya, a network engineer, is implementing a new policy on a Cisco router to ensure that critical voice over IP (VoIP) communications maintain high quality, even when the network experiences significant congestion from bulk data transfers. She needs to configure the router to identify voice packets, assign them a higher priority, and ensure they are serviced before other traffic types when bandwidth becomes limited. Which combination of technologies and configurations would Anya most effectively use to achieve this objective?

Accepted Answer

Configure an Access Control List (ACL) to classify VoIP traffic, mark it with a DSCP EF value, and implement Low Latency Queuing (LLQ) on the relevant interface.

Question 18

A network administrator is tasked with ensuring that Voice over IP (VoIP) calls maintain high quality over a congested WAN link. They have configured a Cisco IOS router with the following QoS components:
- A class map named `VOIP_TRAFFIC` that matches UDP traffic destined for port 5060 and UDP traffic with source ports between 16384 and 32767.
- A policy map named `QOS_POLICY` that assigns a DSCP EF (Expedited Forwarding) value to traffic matched by the `VOIP_TRAFFIC` class map.

Which of the following commands, when executed on the router, would most effectively implement this QoS strategy to prioritize VoIP traffic on the WAN egress?

Accepted Answer

service-policy output QOS_POLICY

Question 19

Anya, a network administrator, is tasked with deploying a new mandatory encryption standard across the entire corporate network. Her inventory includes older routers that only support a foundational level of encryption, newer high-performance switches, and a significant number of virtual servers running various operating systems. The deadline for compliance is rapidly approaching, and initial testing has revealed compatibility issues with several of the legacy devices, requiring custom configurations and potential workarounds. Anya must also coordinate with the application development team to ensure no service disruptions occur for critical business applications that rely on uninterrupted network connectivity.

Which of the following behavioral competencies is MOST critical for Anya to effectively manage this deployment and ensure successful compliance within the given constraints?

Accepted Answer

Adaptability and Flexibility

Question 20

Anya, a network administrator, is tasked with rolling out a critical security update across a geographically dispersed network. The network comprises a mix of legacy devices with limited processing power and newer, more capable hardware. Furthermore, several remote sites experience intermittent and low-bandwidth internet connectivity, making a simultaneous, large-scale push of the update impractical. Anya must devise a deployment strategy that ensures the security update is implemented effectively across all sites while minimizing disruption and addressing the inherent technical limitations and connectivity challenges. Which behavioral competency is most critical for Anya to successfully navigate this complex deployment?

Accepted Answer

Adaptability and Flexibility

Question 21

Anya, a network administrator for a burgeoning e-commerce startup, is troubleshooting a persistent issue where certain client devices intermittently lose network access. She has already verified that all physical connections are sound and that the core switch\'s operational status is nominal. Her next step involves investigating potential logical network configuration errors. Considering Anya\'s goal to pinpoint an IP addressing conflict or a misconfigured VLAN as the source of the problem, which diagnostic command output would most directly confirm a duplicate IP address assignment within the same subnet, leading to the observed connectivity disruptions?

Accepted Answer

Reviewing the ARP cache for multiple MAC addresses associated with a single IP address.

Question 22

Anya, a network administrator, is implementing a new security policy that mandates stricter access controls to an internal development server. She begins by configuring standard numbered access control lists (ACLs) on several edge routers, aiming to permit traffic only from authorized internal subnets and specific external partner IP addresses, while denying all other inbound traffic. However, she observes that legitimate administrative traffic from a different, but authorized, internal subnet is now being blocked, and she\'s struggling to precisely manage the order of operations to avoid unintended consequences due to the implicit deny statement. Which behavioral competency is Anya primarily demonstrating by shifting her approach to utilize named ACLs for better granular control and easier modification of the rule set to resolve this issue?

Accepted Answer

Adaptability and Flexibility

Question 23

Anya, a network engineer, is leading a critical project to transition her organization\'s core network infrastructure from a traditional, hardware-centric model to a contemporary, intent-based networking (IBN) framework. Her team, comprised of seasoned engineers with deep expertise in manual CLI configurations, expresses apprehension regarding the adoption of new automation tools and the abstract nature of policy-driven orchestration. Several team members voice concerns about the learning curve associated with the new platform and the potential for increased ambiguity during the initial phases of deployment. Anya must not only manage the technical aspects of the migration but also effectively address the human element of change. Which of the following approaches best exemplifies Anya\'s demonstration of key behavioral competencies, including adaptability, leadership, and effective communication, to foster successful adoption of the IBN architecture?

Accepted Answer

Proactively schedule and conduct workshops that break down complex IBN concepts into digestible modules, incorporating hands-on labs that simulate real-world scenarios, while actively soliciting feedback on implementation strategies and openly discussing potential challenges and mitigation plans with the team.

Question 24

Anya, a network engineer, is troubleshooting a recurring connectivity problem at a small, newly established branch office. Users report sporadic disconnections and slow network performance that don\'t correlate with specific times of day or user activities. Anya has already confirmed the physical cabling is sound and the switch link lights are consistently green. She has also reviewed the switch\'s MAC address table and VLAN configurations, finding no apparent misconfigurations. Considering the intermittent nature of the issue and the impact on multiple users, which of the following troubleshooting steps would be the most effective next action for Anya to systematically isolate the root cause, demonstrating a strong problem-solving approach?

Accepted Answer

Verify IP address assignments, subnet masks, default gateways for affected workstations, and test basic IP connectivity to the default gateway and an external IP address.

Question 25

Anya, a network administrator, was deep into a comprehensive network security audit, meticulously documenting vulnerabilities and compliance gaps. Suddenly, a critical business decision mandated the immediate rollout of a new company-wide cloud collaboration platform. Anya\'s manager redirected her efforts to lead the implementation of this new tool, requiring her to quickly familiarize herself with its architecture and deployment procedures, with minimal documentation available initially. Anya successfully guided the deployment within a tight deadline, ensuring essential functionalities were operational for all departments. Which behavioral competency is most prominently demonstrated by Anya\'s actions in this scenario?

Accepted Answer

Adaptability and Flexibility

Question 26

Anya, a network administrator for a growing startup, has noticed that internal file transfers between workstations on their Cisco Catalyst 1000 switch are becoming sluggish during peak business hours, despite the overall network appearing stable. She wants to implement a strategy to ensure critical internal data flows receive preferential treatment without disrupting other network operations. Which fundamental Quality of Service (QoS) mechanism, when properly configured, would most directly address Anya\'s objective of guaranteeing a minimum level of bandwidth for specific traffic types during congestion?

Accepted Answer

Class-Based Weighted Fair Queuing (CBWFQ)

Question 27

Anya, a network administrator for a rapidly expanding enterprise, is evaluating the transition from a legacy distance-vector routing protocol to a more advanced link-state protocol. Her primary objectives are to enhance network convergence times and accommodate future network growth. She is considering protocols known for their ability to build a comprehensive topological map. When assessing potential link-state protocols for this scenario, which of the following aspects should Anya prioritize to best meet her stated objectives?

Accepted Answer

The protocol's ability to efficiently scale with increasing network size and its speed of convergence in response to topology changes.

Question 28

Lumina Corp, a new enterprise client, has abruptly introduced stringent data residency regulations that directly contradict the initial network deployment plan Anya\'s team had meticulously prepared, which focused on optimizing data throughput for a global user base. The original plan prioritized a distributed server architecture for low latency. Anya must now ensure all sensitive client data remains within Lumina Corp\'s specified geographic boundaries, necessitating a significant re-architecture of the network\'s data handling and storage components, potentially impacting performance and requiring new security configurations. Which of the following best exemplifies Anya\'s demonstration of behavioral competencies in this situation?

Accepted Answer

Anya proactively revises the network architecture to comply with Lumina Corp's data residency laws, communicates the updated strategy and its implications to her team, and facilitates a workshop to integrate new security protocols, ensuring project momentum despite the shift in priorities.

Question 29

Anya, a network administrator, is leading a critical project to deploy a new encryption standard across a wide-ranging, legacy network infrastructure. The project timeline is aggressive, and initial testing has revealed unexpected compatibility issues with several key network devices. Furthermore, team members possess varying levels of expertise with the new technology, and some are expressing concerns about potential service disruptions. Anya must quickly adjust the deployment strategy, coordinate with different engineering teams, and maintain team morale. Which of the following primary competencies would be most essential for Anya to effectively navigate this complex and evolving situation?

Accepted Answer

Demonstrating strong adaptability and flexibility, coupled with effective leadership potential and robust problem-solving abilities.

Question 30

Anya, a network administrator, is tasked with deploying a new, more robust encryption standard across the organization\'s core network infrastructure. Her team, accustomed to the existing, less secure but familiar methods, expresses significant reluctance, citing concerns about increased complexity and potential performance impacts. Anya recognizes that simply mandating the change will likely lead to passive resistance and suboptimal implementation. Which of the following approaches best reflects Anya\'s need to pivot her strategy, leverage leadership potential, and foster collaboration to ensure successful adoption of the new security protocol?

Accepted Answer

Conduct a series of workshops to demonstrate the technical benefits and security enhancements of the new protocol, actively solicit feedback on potential implementation challenges, and involve team members in developing a phased rollout plan, addressing their concerns through hands-on training and clear communication of the rationale behind the shift.

CCNA Cisco Certified Network Associate CCNA Free Practice Test — 30 Questions

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