CV0-003 Online Practice Questions and Answers

Correct Answer: A

Moving the VM to a host with a faster CPU is the best way to solve the issue of the security appliance installer saying the CPU clock speed does not meet the requirements when building a new VM for a network security appliance. Moving the VM to a host with a faster CPU can ensure that the VM meets the minimum CPU clock speed requirement for the security appliance, as it can use the physical CPU resources of the host. Moving the VM to a host with a faster CPU can also improve the performance and reliability of the security appliance, as it can reduce latency, contention, and overhead. References: CompTIA Cloud+ Certification Exam Objectives, page 11, section 1.6

Correct Answer: D

Correct Answer: ADE

These are the best practices to secure the OS of a new web server that has been provisioned in a cloud environment: Install TLS certificates on the server: TLS (Transport Layer Security) certificates are digital documents that contain information such as identity, public key, expiration date, etc., that can be used to prove one's identity and establish secure communication over a network. Installing TLS certificates on the web server can encrypt and secure web traffic between the server and the clients, as well as prevent spoofing or impersonation attacks. Disable password authentication: Password authentication is a method of verifying and authenticating users or devices based on passwords or other credentials. Password authentication can be insecure or vulnerable to attacks such as brute force, dictionary, phishing, etc., especially if passwords are weak, reused, or compromised. Disabling password authentication can enhance security by preventing unauthorized or malicious access to the web server using passwords. Enable SSH key access only: SSH key access is a method of verifying and authenticating users or devices based on digital keys issued by a trusted authority. SSH key access can provide more security and convenience than password authentication, as it does not require users or devices to remember or enter passwords every time they access the web server. Enabling SSH key access only can ensure that only authorized or trusted users or devices can access the web server using keys.

Correct Answer: B

The best way to resolve the issue where the autoscaling configuration is creating a new VM every five minutes after deploying a new CI/CD tool to automate new releases of the web application and configuring a script to be executed by the VMs during bootstrapping is to debug the script and redeploy it. Debugging the script means finding and fixing any errors or bugs in the code or logic of the script that may cause unexpected or undesired behavior, such as triggering the autoscaling condition or failing to complete the bootstrapping process. Redeploying the script means updating or replacing the existing script with the corrected or improved version of the script. Reference: [CompTIA Cloud+ Certification Exam Objectives], Domain 4.0 Troubleshooting, Objective 4.5 Given a scenario, troubleshoot automation/orchestration issues.

Correct Answer: AF

The best options to implement for a public cloud solution for an existing application using lift and shift that requires scalability and external access are a load balancer and a VPN (virtual private network). A load balancer is a device or service that distributes incoming traffic across multiple servers or instances based on various criteria, such as availability, capacity, or performance. A load balancer can improve scalability by balancing the workload and optimizing resource utilization. A VPN is a technology that creates a secure and encrypted connection over a public network, such as the internet. A VPN can provide external access by allowing remote users or sites to connect to the cloud resources as if they were on the same private network. Reference: CompTIA Cloud+ Certification Exam Objectives, Domain 1.0 Configuration and Deployment, Objective 1.4 Given a scenario, execute a provided deployment plan.

Correct Answer: D

Reference: https://aws.amazon.com/elasticloadbalancing/applicationloadbalancer/

Correct Answer: AB

Telnet and FTP are two services that should be disabled on a cloud server because they are insecure and vulnerable to attacks. Telnet and FTP use plain text to transmit data over the network, which means that anyone who can intercept the traffic can read or modify the data, including usernames, passwords, commands, files, etc. This can lead to data breaches, unauthorized access, or malicious actions on the server1. Instead of Telnet and FTP, more secure alternatives should be used, such as SSH (Secure Shell) and SFTP (Secure File Transfer Protocol). SSH and SFTP use encryption to protect the data in transit and provide authentication and integrity checks for the communication. SSH and SFTP can prevent eavesdropping, tampering, or spoofing of the data and ensure the confidentiality and privacy of the server2. The other options are not services that should be disabled on a cloud server: Option C: Remote login. Remote login is a service that allows users to access a remote server from another location using a network connection. Remote login can be useful for managing, configuring, or troubleshooting a cloud server without having to physically access it. Remote login can be secured by using encryption, authentication, authorization, and logging mechanisms3. Option D: DNS (Domain Name System). DNS is a service that translates human- friendly domain names into IP addresses that can be used to communicate over the Internet. DNS is essential for resolving the names of the cloud resources and services that are hosted on the cloud platform. DNS can be secured by using DNSSEC (DNS Security Extensions), which add digital signatures to DNS records to verify their authenticity and integrity. Option E: DHCP (Dynamic Host Configuration Protocol). DHCP is a service that assigns IP addresses and other network configuration parameters to devices on a network. DHCP can simplify the management of IP addresses and avoid conflicts or errors in the network. DHCP can be secured by using DHCP snooping, which filters out unauthorized DHCP messages and prevents rogue DHCP servers from assigning IP addresses. Option F: LDAP (Lightweight Directory Access Protocol). LDAP is a service that stores and organizes information about users, devices, and resources on a network. LDAP can provide identity management and access control for the cloud environment. LDAP can be secured by using LDAPS (LDAP over SSL/TLS), which encrypts the LDAP traffic and provides authentication and integrity checks.

Correct Answer: AE

Correct Answer: BE

The correct answer is B and E. An agent-based scan and a credentialed scan can help verify if the vulnerability related to outdated web-server software is a true positive with the least effort and cost. An agent-based scan is a type of vulnerability scan that uses software agents installed on the target systems to collect and report data on vulnerabilities. This method can provide more accurate and detailed results than a network-based scan, which relies on network traffic analysis and probes1. An agent-based scan can also reduce the network bandwidth and performance impact of scanning, as well as avoid triggering false alarms from intrusion detection systems2. A credentialed scan is a type of vulnerability scan that uses valid login credentials to access the target systems and perform a more thorough and comprehensive assessment of their configuration, patch level, and vulnerabilities. A credentialed scan can identify vulnerabilities that are not visible or exploitable from the network level, such as missing updates, weak passwords, or misconfigured services3. A credentialed scan can also reduce the risk of false positives and false negatives, as well as avoid causing damage or disruption to the target systems3. A network-based scan, a port scan, a red-team exercise, a blue-team exercise, and unknown environment penetration testing are not the best options to verify if the vulnerability is a true positive with the least effort and cost. A network-based scan and a port scan may not be able to detect the vulnerability if it is not exposed or exploitable from the network level. A red-team exercise, a blue-team exercise, and unknown environment penetration testing are more complex, time-consuming, and costly methods that involve simulating real-world attacks or defending against them. These methods are more suitable for testing the overall security posture and resilience of an organization, rather than verifying a specific vulnerability4.

Correct Answer: A