Term 811
umask
Umask (user file-creation mode mask) is a Linux/Unix setting that determines the default permissions assigned to new files and directories by subtracting or masking permission bits from a base set.
Acronym study
Terms 811–840 of 863 SC-900 acronyms and key terms. Each entry includes a plain-English definition and a link to the full 800-word glossary page with exam context and practice questions.
Term 811
Umask (user file-creation mode mask) is a Linux/Unix setting that determines the default permissions assigned to new files and directories by subtracting or masking permission bits from a base set.
Term 812
Unified Threat Management (UTM) is a single security appliance or service that combines multiple network security functions like firewall, antivirus, intrusion prevention, and content filtering into one device.
Term 813
A use case is a description of how a specific user or system interacts with a system to achieve a particular goal, often used in security operations to define required functions and validate system behavior.
Term 814
A user is any person, system, or device that interacts with an IT service, resource, or identity system, typically authenticated through credentials and authorized to perform specific actions.
Term 815
A User Access Administrator is an IT professional responsible for managing who can access what resources in an organization, including creating, modifying, and revoking user accounts and permissions across systems.
Term 816
A user account is a digital identity that allows a person to access a computer system, network, or application with specific permissions and settings.
Term 817
User Account Control (UAC) is a Windows security feature that prevents unauthorized changes to the operating system by prompting for permission before allowing actions that affect system settings or installed programs.
Term 818
User behaviour analytics (UBA) is a cybersecurity process that monitors and analyzes patterns in how users interact with systems to detect abnormal actions that may indicate a security threat.
Term 819
User lifecycle is the complete journey of a user's account in a system, from creation through maintenance to eventual removal.
Term 820
Unified Threat Management (UTM) is a comprehensive security appliance that combines multiple security functions like firewall, antivirus, intrusion prevention, and VPN into a single device.
Term 821
Verify explicitly means that a system must actively confirm a user's identity or permissions before granting access, rather than trusting implied or cached credentials.
Term 822
Virtualization security is the practice of protecting virtualized environments including virtual machines, hypervisors, virtual networks, and related infrastructure from threats and vulnerabilities.
Term 823
A virus is a malicious software program that attaches itself to legitimate files or programs and spreads to other systems, often causing damage or stealing information.
Term 824
Viva is a Microsoft 365 employee experience platform that helps organizations connect, engage, and develop their workforce through personalized insights, communications, and learning tools.
Term 825
A VLAN (Virtual Local Area Network) is a logical grouping of network devices that behave as if they are on the same physical network segment, regardless of their actual physical location.
Term 826
A Virtual Private Cloud (VPC) is a logically isolated section of a cloud provider's network where you can launch and manage resources like servers and databases with complete control over IP addressing, subnets, route tables, and security.
Term 827
A VPC endpoint is a private connection that allows resources inside a Virtual Private Cloud to access supported AWS services or external networks without going over the public internet.
Term 828
VPC peering is a direct network connection between two virtual private clouds that allows them to communicate using private IP addresses as if they were part of the same network.
Term 829
A VPN (Virtual Private Network) creates a secure, encrypted tunnel between your device and a remote server, protecting your data and hiding your online activity.
Term 830
A VPN creates an encrypted tunnel over a public network to securely connect remote users or sites to a private network.
Term 831
A VPN concentrator is a network device that manages, encrypts, and routes multiple VPN connections from remote users or sites into a single secure gateway.
Term 832
A VPN Gateway is a network device or service that creates an encrypted tunnel between two or more networks over the internet, allowing secure communication.
Term 833
A vulnerability is a weakness in a system, network, or software that could be exploited by a threat to cause harm or unauthorized access.
Term 834
A vulnerability assessment is a systematic review of security weaknesses in an information system, evaluating if the system is susceptible to any known vulnerabilities, assigning severity levels, and recommending remediation or mitigation.
Term 835
Vulnerability management is the continuous process of identifying, classifying, prioritizing, and remediating security weaknesses in an organization's IT environment.
Term 836
A vulnerability scan is an automated process that checks systems, networks, and applications for known security weaknesses or misconfigurations.
Term 837
Vulnerability scanning is an automated process that identifies security weaknesses in systems, networks, and applications by comparing them against known vulnerability databases.
Term 838
A Web Application Firewall (WAF) is a security tool that filters, monitors, and blocks HTTP traffic to and from a web application to protect it from common attacks.
Term 839
A Web Application Firewall (WAF) is a security tool that monitors, filters, and blocks HTTP traffic to and from a web application to protect it from common attacks.
Term 840
Weighted routing is a traffic management technique that distributes network requests across multiple servers or paths according to assigned numerical weights, allowing for controlled, uneven load distribution.