Channel Service Unit: A hardware device connecting a digital line (like T1) to customer equipment.

Central Service Unit: A software application for managing network traffic.

Customer Service Unit: A department handling customer inquiries and support.

Communication Service Unit: A device for enhancing signal quality in analog lines.

Antivirus: Software that detects, prevents, and removes malware.

Audio Visual: A combination of sound and visual components.

Average Value: A statistical measure of central tendency.

Active Virus: A type of malware that replicates itself.

Certificate Authority: Entity that issues and manages digital certificates.

Central Authority: Organization that regulates financial transactions.

Control Account: A summary account that consolidates financial data.

Certified Analyst: A professional who analyzes data for certification.

Advanced Encryption Standard 256-bit: AES using 256-bit keys; considered highly secure for modern cryptography.

Advanced Encryption Standard 128-bit: AES using 128-bit keys; considered moderately secure.

Advanced Encryption Standard 512-bit: AES using 512-bit keys; considered less secure.

Advanced Encryption Standard 64-bit: AES using 64-bit keys; considered outdated.

Corporate Owned, Personally Enabled: Device model where the company owns devices but employees can use them personally.

Company Owned, Personal Equipment: Employees use their own devices for work purposes.

Corporate Owned, Personal Equipment: Company provides devices for personal use only.

Company Owned, Professionally Enabled: Devices are owned by the company and used strictly for work.

Business Impact Analysis: Determines impact of disruptions on business operations.

Business Integration Assessment: Evaluates the synergy between business units.

Business Information Architecture: Organizes data for business intelligence.

Business Improvement Action: Strategies for enhancing operational efficiency.

Automated Indicator Sharing: A DHS/CISA system enabling organizations to automatically share threat intelligence.

Automated Information System: A system for managing data and information in organizations.

Artificial Intelligence System: A technology that simulates human intelligence processes.

Advanced Integration Software: A platform for integrating various software applications.

Digital Encryption Standard: Legacy symmetric encryption algorithm; replaced by AES due to weakness.

Data Encryption Standard: A modern encryption technique used for secure communications.

Dynamic Encryption Standard: An algorithm that adapts to different data types.

Digital Encoding Standard: A method for encoding digital signals.

Extensible Authentication Protocol: A flexible authentication framework commonly used in wireless and VPN security.

Enhanced Access Protocol: A method for improving network access speeds.

Emergency Alert Protocol: A system for broadcasting emergency messages.

Electronic Authentication Process: A digital method for verifying user identities.

Annualized Rate of Occurrence: Number of times per year a threat is expected to occur.

Average Rate of Occurrence: The mean frequency of an event over time.

Annualized Risk of Occurrence: The yearly probability of a risk event happening.

Aggregate Rate of Occurrence: Total number of events over a specified period.

Digital Signature Algorithm: A U.S. government standard for creating digital signatures that verify authenticity and integrity.

Data Security Architecture: A framework for securing data in transit and at rest.

Dynamic System Analysis: A method for evaluating system performance over time.

Distributed Storage Access: A protocol for accessing data across distributed systems.

Certificate Revocation List: A list of digital certificates that have been revoked before their expiration date.

Certificate Renewal List: A list of digital certificates that are up for renewal.

Certificate Registration List: A list of digital certificates that are newly registered.

Certificate Reissue List: A list of digital certificates that have been reissued due to changes.

Confidentiality, Integrity, Availability: The foundational cybersecurity triad securing data privacy, accuracy, and accessibility.

Confidentiality, Integrity, and Authentication: Key principles in data security.

Confidentiality, Integrity, and Anonymity: Essential for user privacy.

Confidentiality, Integrity, and Accessibility: Basic principles of network security.

Domain Message Authentication Reporting and Conformance: Email authentication protocol validating domain alignment using SPF/DKIM.

Domain Management and Reporting for Compliance: A framework for managing domain names.

Data Management and Reporting for Cloud: A protocol for cloud data security.

Domain Mail Authentication and Reporting Control: A system for controlling email delivery.

Cyclic Redundancy Check: Error-detection method for verifying data integrity in transmissions/storage.

Constant Rate Control: A method for managing data flow in networks.

Code Redundancy Check: A technique for ensuring data is not duplicated.

Cyclic Redundancy Code: A formula used for data compression.

Application Programming Interface: A set of rules enabling software applications to communicate.

Advanced Programming Interface: A tool for software debugging.

Automated Programming Integration: A method for software deployment.

Application Performance Indicator: A metric for software efficiency.

Encapsulated Security Payload: An IPsec protocol providing encryption, integrity, and confidentiality for packets.

Extended Security Protocol: A framework for secure communications over the internet.

Enhanced Security Protocol: A method for improving data security in wireless networks.

Encryption Security Protocol: A protocol focused solely on data encryption.

False Rejection Rate: Biometric measure describing how often valid users are incorrectly rejected.

False Recognition Rate: Measure of how often invalid users are incorrectly accepted.

False Rejection Ratio: The percentage of valid users rejected by the system.

False Acceptance Rate: The rate at which unauthorized users are accepted as valid.

DomainKeys Identified Mail: Email validation method using cryptographic signatures to prevent spoofing.

DomainKeys Identified Mail: A method for encrypting email content.

DomainKeys Identified Mail: A protocol for sending large attachments via email.

DomainKeys Identified Mail: A technique for tracking email open rates.