CISCO 300-630 Implementing Cisco Application Centric Infrastructure - Advanced (DCACIA) Free Practice Test — 30 Questions

Question 1

A data center is planning to upgrade its network infrastructure to support a new application that requires a minimum bandwidth of 10 Gbps. The current network can handle 5 Gbps, and the data center has a total of 20 servers, each capable of handling 1 Gbps. If the application is expected to grow by 20% in bandwidth requirements annually, what is the minimum number of additional servers needed to meet the projected demand in three years, assuming no other upgrades are made to the existing infrastructure?

Accepted Answer

5 additional servers

Question 2

In a data center utilizing a Leaf-Spine architecture, a network engineer is tasked with optimizing the bandwidth between the leaf switches and spine switches. The data center has 4 spine switches and 12 leaf switches. Each leaf switch is connected to every spine switch with a 10 Gbps link. If the engineer wants to calculate the total available bandwidth between the leaf and spine layers, what would be the total bandwidth available for communication between the leaf and spine switches?

Accepted Answer

480 Gbps

Question 3

In a corporate network, an Intrusion Detection System (IDS) is deployed to monitor traffic and detect potential threats. The IDS generates alerts based on predefined rules and thresholds. During a routine analysis, the security team notices that the IDS has flagged a significant number of alerts related to port scanning activities. The team decides to investigate further and finds that the alerts are primarily triggered by a specific IP address that is attempting to connect to multiple ports on various servers within the network. Given this scenario, which of the following actions should the security team prioritize to effectively manage the situation and enhance the overall security posture of the network?

Accepted Answer

Implement rate limiting on the affected servers to mitigate the impact of the port scanning activity.

Question 4

In a Cisco ACI environment, you are tasked with configuring a new application profile that requires specific endpoint groups (EPGs) to communicate with each other while adhering to security policies. You need to ensure that the communication between EPGs is controlled and that the application can scale efficiently. Given that you have two EPGs, EPG-A and EPG-B, which are part of the same application profile, what is the most effective way to configure the contracts between these EPGs to allow for both inter-EPG communication and the enforcement of security policies?

Accepted Answer

Create a contract that allows both EPG-A and EPG-B to communicate with each other, specifying the required filters for the allowed traffic.

Question 5

In a multi-tenant environment utilizing Cisco Application Centric Infrastructure (ACI), a network engineer is tasked with integrating a third-party service for enhanced security monitoring. The service requires specific API calls to be made to the ACI fabric to retrieve telemetry data. The engineer must ensure that the integration adheres to the ACI\'s security policies while maintaining optimal performance. Which approach should the engineer take to effectively integrate the third-party service while ensuring compliance with ACI\'s security model?

Accepted Answer

Utilize the ACI REST API to create a service graph that includes the third-party service, ensuring that the necessary contracts and filters are applied to control traffic flow and access permissions.

Question 6

In a Cisco ACI environment, you are tasked with troubleshooting a connectivity issue between two endpoints that are part of different application profiles. You notice that the endpoints are not able to communicate despite being in the same bridge domain. Upon further inspection, you find that the contracts between the application profiles are not configured correctly. What steps should you take to resolve this issue, and which of the following actions would be the most effective in ensuring proper communication between the endpoints?

Accepted Answer

Modify the contract to allow the necessary traffic between the application profiles.

Question 7

In a Cisco Application Centric Infrastructure (ACI) environment, a network administrator is tasked with configuring contract enforcement between two application profiles: \"WebApp\" and \"DatabaseApp.\" The WebApp requires access to the DatabaseApp for retrieving data, but only on specific ports (TCP 80 and TCP 443). The administrator must ensure that the contract allows this traffic while denying all other types of traffic. Given the following contract rules, which configuration would effectively enforce this requirement?

Accepted Answer

Create a contract with filters that permit TCP 80 and TCP 443, and apply it to the WebApp's EPG to allow traffic to the DatabaseApp's EPG.

Question 8

In a microservices architecture, an application needs to interact with multiple services through APIs. The development team decides to implement OAuth 2.0 for authentication and authorization. Given that the application will be deployed in a cloud environment, which of the following statements best describes the implications of using OAuth 2.0 in this context, particularly regarding token management and security best practices?

Accepted Answer

OAuth 2.0 requires the application to securely store access tokens and refresh tokens, ensuring that they are not exposed in client-side code or logs, and mandates the use of HTTPS to protect token transmission.

Question 9

In a data center utilizing Cisco Application Centric Infrastructure (ACI), a network engineer is tasked with designing a service graph to manage traffic between multiple application tiers. The service graph must include a firewall and an intrusion detection system (IDS) to ensure security and compliance. Given that the firewall can handle a maximum throughput of 1 Gbps and the IDS can handle 500 Mbps, if the total incoming traffic to the application is 1.5 Gbps, how should the engineer configure the service graph to optimize performance while ensuring that all traffic is inspected?

Accepted Answer

Configure the service graph to route traffic through the firewall first, then to the IDS, and implement load balancing to distribute traffic across multiple instances of the IDS.

Question 10

In a data center utilizing Cisco\'s Application Centric Infrastructure (ACI), a network engineer is tasked with designing a scalable architecture that incorporates both leaf and spine switches. The engineer needs to ensure that the network can handle a projected increase in traffic due to the deployment of new applications. Given that the current leaf switches can support a maximum of 48 10GbE ports and the spine switches can support a maximum of 32 40GbE ports, how many leaf switches are required if the total number of servers is expected to be 192, with each server requiring a dedicated 10GbE connection to the leaf switches? Additionally, if each spine switch can connect to a maximum of 8 leaf switches, how many spine switches are necessary to accommodate the leaf switches in this design?

Accepted Answer

4 leaf switches and 1 spine switch

Question 11

In a Cisco ACI environment, you are tasked with performing a maintenance operation on the ACI fabric. You need to ensure that the fabric remains operational while you upgrade the firmware of the Application Policy Infrastructure Controller (APIC). Given that the APIC is responsible for managing the ACI fabric, what is the best approach to maintain service continuity during this upgrade process?

Accepted Answer

Upgrade the APIC in a rolling fashion, ensuring that at least one APIC remains operational at all times.

Question 12

In a data center environment, a network engineer is tasked with capturing and analyzing packet data to troubleshoot a performance issue. The engineer uses a packet capture tool to collect data over a period of time and notices that the average packet size is 1500 bytes. If the total number of packets captured during this period is 10,000, what is the total amount of data captured in megabytes (MB)? Additionally, the engineer needs to determine the percentage of packets that are TCP packets, given that 7,500 of the captured packets are TCP. What is the total data captured in MB and the percentage of TCP packets?

Accepted Answer

14.3 MB and 75%

Question 13

In a multi-tier application deployment within a Cisco Application Centric Infrastructure (ACI) environment, you are tasked with ensuring that the application can scale efficiently while maintaining optimal performance. The application consists of a web tier, an application tier, and a database tier. Each tier has specific resource requirements: the web tier requires 2 vCPUs and 4 GB of RAM, the application tier requires 4 vCPUs and 8 GB of RAM, and the database tier requires 8 vCPUs and 16 GB of RAM. If the total available resources in the ACI environment are 32 vCPUs and 64 GB of RAM, what is the maximum number of instances of the application that can be deployed without exceeding the available resources?

Accepted Answer

2 instances

Question 14

In a data center environment, a network administrator is tasked with integrating Syslog and SNMP for enhanced monitoring and alerting of network devices. The administrator needs to ensure that critical events are logged and that SNMP traps are sent to the management system. Given the following requirements: 1) All critical events must be logged with a severity level of \"critical\" or higher, 2) SNMP traps should be sent for specific events such as device reboots and interface status changes, and 3) the logging and SNMP configurations must comply with industry best practices. Which configuration approach would best meet these requirements?

Accepted Answer

Configure Syslog to log messages with a severity level of "critical" and above, and set up SNMP to send traps for device reboots and interface status changes using the appropriate OIDs.

Question 15

In a Cisco ACI environment, you are tasked with configuring a new application profile that requires specific endpoint groups (EPGs) to communicate with each other while adhering to security policies. You need to ensure that the communication between EPGs is controlled and that the application can scale efficiently. Given the following requirements: EPG A should communicate with EPG B and EPG C, but EPG B should not communicate with EPG C directly. Additionally, you want to implement a contract that allows only HTTP traffic between EPG A and EPG B, while allowing all traffic between EPG A and EPG C. What is the best approach to configure this scenario in ACI?

Accepted Answer

Create a contract that permits HTTP traffic between EPG A and EPG B, and another contract that allows all traffic between EPG A and EPG C, while ensuring that EPG B and EPG C do not have a direct contract between them.

Question 16

In a corporate network, an Intrusion Detection System (IDS) is deployed to monitor traffic and detect potential threats. The IDS is configured to analyze both inbound and outbound traffic, utilizing a combination of signature-based and anomaly-based detection methods. During a routine analysis, the IDS identifies a significant increase in traffic from a specific internal IP address to an external server, which is not part of the normal operational pattern. Given that the baseline traffic for this internal IP address is typically 100 packets per minute, and the IDS logs show a spike to 1,000 packets per minute over a 10-minute period, what should be the primary course of action for the network security team?

Accepted Answer

Investigate the internal IP address for potential compromise or malicious activity.

Question 17

In a data center utilizing Cisco Application Centric Infrastructure (ACI), a network engineer is tasked with implementing policy-based automation to streamline the deployment of application services. The engineer needs to define a policy that automatically allocates resources based on application requirements, ensuring that the necessary bandwidth and security policies are applied. Given a scenario where an application requires a minimum of 100 Mbps bandwidth and must comply with specific security protocols, which approach should the engineer take to ensure that the policy is effectively implemented and monitored?

Accepted Answer

Create a service graph that includes the required bandwidth and security policies, and apply it to the application profile.

Question 18

In a hybrid cloud environment, a company is evaluating its connectivity options between its on-premises data center and a public cloud provider. The company needs to ensure low latency and high bandwidth for its applications, which are sensitive to performance fluctuations. They are considering three primary connectivity options: Direct Connect, VPN over the Internet, and a dedicated leased line. Given the requirements for performance and reliability, which connectivity option would best meet the company\'s needs while also considering cost-effectiveness and scalability for future growth?

Accepted Answer

Direct Connect

Question 19

In a rapidly evolving technological landscape, a company is considering the implementation of a multi-cloud strategy to enhance its application performance and resilience. They aim to leverage various cloud providers to optimize costs and improve service availability. Given the potential challenges of managing multiple cloud environments, which of the following strategies would best facilitate effective governance and security across these diverse platforms?

Accepted Answer

Implementing a centralized cloud management platform that provides visibility, compliance, and security policies across all cloud environments.

Question 20

In a rapidly evolving technological landscape, a company is considering the implementation of a multi-cloud strategy to enhance its application performance and resilience. They aim to leverage various cloud providers to optimize costs and improve service availability. Given the potential challenges of managing multiple cloud environments, which of the following strategies would best facilitate effective governance and security across these diverse platforms?

Accepted Answer

Implementing a centralized cloud management platform that provides visibility, compliance, and security policies across all cloud environments.

Question 21

In a data center utilizing Cisco Application Centric Infrastructure (ACI), a network engineer is tasked with configuring an application profile for a new web application that requires high availability and load balancing across multiple servers. The application profile must include specific endpoint groups (EPGs) for web servers, application servers, and database servers. Given that the web servers need to communicate with both the application servers and the database servers, which configuration approach should the engineer take to ensure optimal traffic flow and security policies while adhering to best practices in ACI?

Accepted Answer

Create a single application profile that includes all EPGs and configure contracts to allow communication between them.

Question 22

In a data center environment, a network architect is tasked with designing a scalable and resilient application-centric infrastructure (ACI) that can handle varying workloads efficiently. The architect decides to implement a multi-tenancy model to optimize resource allocation and ensure isolation between different applications. Which design best practice should the architect prioritize to enhance the security and performance of the ACI deployment while maintaining operational simplicity?

Accepted Answer

Implementing Application Profiles with specific Endpoint Groups (EPGs) to enforce policies and segmentation.

Question 23

In a Cisco Application Centric Infrastructure (ACI) environment, a network engineer is tasked with implementing contract enforcement between two application endpoints: a web server and a database server. The web server needs to send HTTP requests to the database server, which should only respond to these requests if they originate from the web server. The engineer must configure the contract to ensure that only the necessary traffic is allowed while preventing any unauthorized access. Given that the web server is assigned to Endpoint Group (EPG) A and the database server to Endpoint Group (EPG) B, which of the following configurations would best achieve this requirement?

Accepted Answer

Create a contract that allows HTTP (TCP port 80) traffic from EPG A to EPG B and denies all other traffic types.

Question 24

In a Cisco ACI environment, a network engineer is tasked with designing a multi-tenant architecture that ensures optimal resource allocation and security between different tenants. The engineer must decide on the best practices for configuring Application Profiles, Bridge Domains, and Endpoint Groups (EPGs) to achieve this goal. Which of the following configurations would best support the isolation and management of resources across multiple tenants while adhering to ACI best practices?

Accepted Answer

Create separate Application Profiles for each tenant, assign unique Bridge Domains to each Application Profile, and configure EPGs within those Bridge Domains to ensure complete isolation of tenant traffic.

Question 25

In a large enterprise network, a network engineer is tasked with automating the configuration of multiple switches using a Python script. The script is designed to connect to each switch via SSH, retrieve the current configuration, and apply a standardized configuration template. However, the engineer needs to ensure that the script can handle exceptions, such as connection timeouts or authentication failures, and log these events for troubleshooting. Which approach should the engineer take to effectively implement this automation while ensuring reliability and maintainability?

Accepted Answer

Use the Paramiko library for SSH connections, implement try-except blocks to handle exceptions, and utilize the logging module to log events.

Question 26

In a large enterprise network, the IT team is tasked with automating the deployment of network configurations across multiple devices using a centralized management system. They decide to implement a Python-based automation script that utilizes the REST API of their network devices. The script is designed to push configurations to 100 switches simultaneously. If each switch takes an average of 2 seconds to apply the configuration, what is the total time taken for all switches to complete the configuration deployment? Additionally, if the team wants to reduce the deployment time by 25% through parallel processing, what would be the new total time for the deployment?

Accepted Answer

150 seconds

Question 27

In a data center utilizing Cisco Application Centric Infrastructure (ACI), a network engineer is troubleshooting an issue where a specific application is experiencing intermittent connectivity problems. The engineer suspects that the issue may be related to the Application Network Profile (ANP) configuration. After reviewing the configuration, the engineer finds that the application is assigned to a specific Endpoint Group (EPG) that has been configured with a contract allowing communication with another EPG. However, the engineer notices that the contract is not being honored, leading to dropped packets. What troubleshooting technique should the engineer employ to determine whether the issue lies within the contract configuration or the endpoint connectivity?

Accepted Answer

Use the ACI Faults and Events dashboard to check for any contract-related faults or events.

Question 28

In a Cisco Application Centric Infrastructure (ACI) environment, you are tasked with analyzing the health scores of various application endpoints through the APIC dashboard. You notice that one of the application profiles has a health score of 75%. This score is derived from several factors, including the status of the application endpoints, the health of the associated bridge domains, and the overall performance of the underlying physical infrastructure. If the health score is calculated using the formula:

Accepted Answer

ext{Health Score} = \frac{	ext{Total Health Points}}{	ext{Total Possible Points}} 	imes 100 $$

Question 29

In a Cisco Application Centric Infrastructure (ACI) environment, a network engineer is tasked with configuring fabric membership for a new set of leaf switches. The engineer needs to ensure that these leaf switches can communicate effectively with the existing spine switches while adhering to the best practices for fabric membership. Given that the new leaf switches will be added to an existing fabric that already has 4 spine switches and 8 leaf switches, what is the maximum number of leaf switches that can be added to the fabric without exceeding the recommended design limits?

Accepted Answer

16

Question 30

In a large enterprise utilizing Cisco Application Centric Infrastructure (ACI), the network team is tasked with implementing a multi-tenancy environment to support various departments, each with distinct security and performance requirements. The team decides to create separate tenants for the finance, HR, and IT departments. Each tenant must have its own policies for application performance and security. Given this scenario, which of the following best describes the primary benefit of using ACI\'s multi-tenancy feature in this context?

Accepted Answer

It allows for the isolation of network resources and policies per tenant, ensuring that each department can operate independently without affecting others.

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