Set 32 Flashcards
(30 cards)
resmon.exe (Resource Monitor)
A Windows utility that provides real-time information about CPU, memory, disk, and network usage. Helpful for diagnosing system performance issues.
Resources
System components like CPU cycles, memory (RAM), storage, and network bandwidth used by hardware and software. Proper resource management ensures system performance and stability.
Response Rate
In display technology, this is how quickly a pixel can change from one color to another, typically measured in milliseconds (ms). A lower response time is better for reducing motion blur in fast-moving visuals.
Restore Point
A saved snapshot of system settings and files in Windows, used by System Restore to roll back the system to a previous working state without affecting personal files.
Retina Scanner
A biometric device that uses infrared light to scan the unique pattern of blood vessels in the retina for high-security authentication.
RFI
(Radio Frequency Interference). Electromagnetic interference caused by radio waves, which can disrupt wireless communication and other electronic devices.
RG-6
A type of coaxial cable commonly used for cable TV and broadband internet. It has better shielding and supports higher frequencies than RG-59.
RG-59
An older type of coaxial cable typically used for analog video signals or short cable runs. Not as effective as RG-6 for modern broadband.
Riser Card
A circuit board that allows additional expansion cards to be installed parallel to the motherboard. Useful in compact or low-profile cases.
Risk Analysis
The process of identifying and evaluating potential risks to systems or data, often used in cybersecurity and disaster recovery planning.
RJ Connector (Registered Jack)
A standardized physical network interface. Common types include:
RJ-11: Used for telephone lines
RJ-45: Used for Ethernet/network cables
RJ-11
A 4- or 6-pin connector used for telephone connections, typically carrying one or two phone lines.
RJ-45
An 8-pin connector used with Ethernet cables for wired networking (Cat5e, Cat6, etc.).
rm (Linux command)
Short for “remove.” A Linux command used to delete files from the command line (e.g., rm file.txt).
rmdir (Linux/Windows command)
Short for “remove directory.” A command-line utility used to delete empty directories in Linux or Windows (e.g., rmdir foldername).
Roaming
The ability for a mobile device to stay connected to a network while moving between different geographic areas, often by connecting to a partner carrier’s network. Can also refer to user profiles that follow the user across different systems in a networked environment.
robocopy
Short for Robust File Copy, it’s a command-line tool in Windows used to efficiently copy files and directories, especially over networks. Supports features like resuming interrupted copies, multi-threading, and logging.
rogue anti-malware
A malicious program disguised as a legitimate antivirus tool. It tricks users into believing their system is infected, then demands payment to “fix” the fake issues.
ROM
(Read-Only Memory). Non-volatile memory that contains firmware or system instructions. Data in ROM cannot be modified easily or at all (without specialized tools).
root directory
The top-level directory in a file system hierarchy. It contains all other folders and files. On Windows, it’s usually C:.
root keys (Windows Registry)
The five top-level sections in the Windows Registry:
- HKEY_CLASSES_ROOT
- HKEY_CURRENT_USER
- HKEY_LOCAL_MACHINE
- HKEY_USERS
- HKEY_CURRENT_CONFIG
rooting
The process of gaining privileged (root) access to an Android device’s operating system, allowing deeper customization and control—similar to jailbreaking on iOS.
rootkit
A stealthy type of malware designed to hide its presence and give attackers administrator-level control over a system.
router
A networking device that forwards data packets between networks, typically connecting a local network to the internet and assigning IP addresses to devices.
