Side loading is the process of installing applications from unofficial sources, often bypassing standard app stores. This increases the risk of installing malicious software, such as a rootkit, which is a type of malware designed to provide persistent privileged access while hiding its presence.
Reference:
CompTIA Security+ SY0-701 Official Study Guide, Domain 2.1: "Side loading applications from unofficial sources can introduce malware, such as rootkits, to the system." Exam Objectives 2.1: "Compare and contrast different types of threats."

A risk register is a document that records and tracks the risks associated with a project, system, or organization. A risk register typically includes information such as the risk description, the risk owner, the risk probability, the risk impact, the risk level, the risk response strategy, and the risk status. A risk register can help identify, assess, prioritize, monitor, and control risks, as well as communicate them to relevant stakeholders. A risk register can also help document the risk tolerance and thresholds of an organization, which are the acceptable levels of risk exposure and the criteria for escalating or mitigating risks. References = CompTIA Security+ Certification Exam Objectives, Domain 5.1: Explain the importance of policies, plans, and procedures related to organizational security. CompTIA Security+ Study Guide (SY0-
701), Chapter 5: Governance, Risk, and Compliance, page 211. CompTIA Security+ Certification Guide, Chapter 2: Risk Management, page 33. CompTIA Security+ Certification Exam SY0-701 Practice Test 1, Question 4.

Secure Real-Time Transport Protocol (SRTP) is a security protocol used to encrypt and authenticate the streaming of audio and video over IP networks. It ensures that the video streams from the IP cameras are both encrypted to prevent unauthorized access and authenticated to verify the integrity of the stream, making it the ideal choice for securing video surveillance.
References:
* CompTIA Security+ SY0-701 Course Content: Domain 3: Security Architecture, which includes secure communication protocols like SRTP for protecting data in transit.

ACertificate Revocation List (CRL)is adigitally signed list maintained by a Certificate Authority (CA)that containsrevoked or expired certificates. This prevents clients from trustingcompromised or outdated certificates.
TPM (A)is a hardware security module, unrelated to certificate revocation.
PKI (C)is the overall system managing digital certificates, but it does not store revocation lists.
CSR (D)is a request to obtain a certificate, not to revoke one.
Reference:CompTIA Security+ SY0-701 Official Study Guide, Security Architecture domain.

User Behavior Analytics (UBA)is specifically designed to detectanomalous or suspicious behaviorsby users that may indicate insider threats. UBA toolsestablish a baseline of normalbehaviorfor users and alert security teams when deviations occur (e.g., accessing sensitive files at odd hours, downloading large volumes of data, etc.).
Malicious insiders often bypass perimeter defenses like firewalls or IDS/IPS systems because they arelegitimate users. UBA offersvisibility into internal behavior patterns, which is essential for detecting these threats.
Reference: CompTIA Security+ SY0-701 Objectives, Domain 2.2 - "Insider threats and behavioral analytics (e.g., UBA, UEBA)."