Explanation:
Web serverBotnet Enable DDoS protectionUser RAT Implement a host-based IPSDatabase server Worm Change the default application passwordExecutive KeyloggerDisable vulnerable servicesApplication Backdoor Implement 2FA using push notification A screenshot of a computer program Description automatically generated with low confidence

A Certificate Signing Request (CSR) is a request sent to a certificate authority (CA) to issue an SSL certificate. The CSR contains information like the public key, which will be part of the certificate.References:
Security+ SY0-701 Course Content, Security+ SY0-601 Book.

SQL injection is a type of attack that exploits a database misconfiguration or a flaw in the application code that interacts with the database. An attacker can inject malicious SQL statements into the user input fields or the URL parameters that are sent to the database server. These statements can then execute unauthorized commands, such as reading, modifying, deleting, or creating data, or even taking over the database server. SQL injection can compromise the confidentiality, integrity, and availability of the data and the system. References: CompTIA Security+ Study Guide: Exam SY0-701, 9th Edition, page 215 1

Centralized authentication (such as Active Directory or LDAP) combined with proper password policies helps prevent the reuse of the same local credentials across multiple systems, reducing the risk of lateral movement during attacks like credential reuse or pass-the-hash.
Reference:
CompTIA Security+ SY0-701 Official Study Guide, Domain 3.1: "Centralized authentication and strong password policies reduce risks associated with local account reuse." Exam Objectives 3.1: "Implement secure network architecture concepts."