Term 691
Public IP address
A globally unique IP address assigned to a device that allows it to communicate directly over the internet.
Acronym study
Terms 691–720 of 1033 N10-009 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 691
A globally unique IP address assigned to a device that allows it to communicate directly over the internet.
Term 692
A public subnet is a segment of a cloud Virtual Private Cloud (VPC) or traditional network that has a direct route to the internet via an Internet Gateway, allowing resources within it to send and receive traffic from the public internet.
Term 693
A punchdown tool is a handheld device used by network technicians to push wires into insulation-displacement connectors on keystone jacks, patch panels, and punchdown blocks, securing a reliable electrical connection without stripping the insulation.
Term 694
PVST+ (Per-VLAN Spanning Tree Plus) is a Cisco proprietary enhancement of the Spanning Tree Protocol that runs a separate instance of STP for each VLAN, allowing per-VLAN load balancing while maintaining loop-free topology.
Term 695
PXE is a client-server protocol that allows a computer to boot from a network interface card without a local storage device.
Term 696
QoS (Quality of Service) is a network technique that manages data traffic to ensure critical applications get the bandwidth and low latency they need.
Term 697
QSFP stands for Quad Small Form-factor Pluggable, a compact, hot-pluggable transceiver used in networking to send and receive high-speed data over fiber optic or copper cables.
Term 698
A Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver module used in networking to connect switches, routers, and servers to fiber optic or copper cables, supporting four data channels in one module.
Term 699
Quality of Service (QoS) is a set of technologies used to manage network traffic by prioritizing certain types of data to ensure reliable performance for critical applications.
Term 700
Quantum computing is a type of computation that uses quantum bits (qubits) and principles of quantum mechanics to process information in ways that classical computers cannot.
Term 701
Radio Frequency Identification (RFID) is a wireless technology that uses radio waves to automatically identify and track tags attached to objects, people, or animals without requiring direct line-of-sight.
Term 702
RADIUS is a network protocol that provides centralized authentication, authorization, and accounting management for users who connect and use a network service.
Term 703
RAID (Redundant Array of Independent Disks) is a data storage technology that combines multiple physical disk drives into one or more logical units for improved performance, fault tolerance, or both.
Term 704
RAID 0 is a storage configuration that combines multiple hard drives into one logical unit to improve speed and capacity, but with no fault tolerance or data protection.
Term 705
RAID 1 is a data storage method that creates an exact copy of data on two or more drives so that if one fails, your information is safe.
Term 706
RAID 10 combines RAID 1 mirroring and RAID 0 striping to provide both high performance and fault tolerance by writing identical data across mirrored pairs that are then striped for speed.
Term 707
RAID 5 is a disk array configuration that uses block-level striping with distributed parity to provide fault tolerance and good read performance while using storage space efficiently.
Term 708
RAM (Random Access Memory) is your computer's short-term memory, temporarily holding data the CPU needs right now or very soon.
Term 709
RAM (Random-Access Memory) is volatile computer memory that temporarily stores data for quick access by the CPU.
Term 710
Rapid provisioning is the automated and fast deployment of IT resources, such as servers, storage, and networking, often through templates and scripts, to reduce setup time from days to minutes.
Term 711
Rapid PVST+ is a Cisco-proprietary enhancement of the Spanning Tree Protocol that creates a separate spanning tree instance for each VLAN and uses Rapid Spanning Tree Protocol (802.1w) to provide much faster convergence after a network topology change.
Term 712
Rapid Spanning Tree Protocol (RSTP) is a network protocol that prevents loops in Ethernet networks by quickly recalculating the best path when a link fails.
Term 713
Remote Desktop Protocol is a Microsoft protocol that lets you connect to and control another computer over a network as if you were sitting in front of it.
Term 714
A Reachability Analyzer is a tool or feature that tests whether a network path exists between two endpoints, verifying connectivity and identifying potential routing or firewall issues.
Term 715
A read replica is a copy of a database that is used only to handle read queries, taking load off the primary database.
Term 716
Received Signal Strength Indicator (RSSI) is a measurement of how strong a wireless signal is when it reaches a receiving device, like a laptop connecting to Wi-Fi.
Term 717
A receiver is a hardware device or software component that accepts incoming signals, data, or transmissions from a sender over a communication channel.
Term 718
A hidden section on a computer's hard drive that contains the files needed to restore the operating system to its factory state.
Term 719
Recovery point objective (RPO) is the maximum acceptable amount of data loss measured in time, determining how frequently backups must be taken.
Term 720
Recovery time objective (RTO) is the maximum acceptable time that an IT system can be offline after a failure before the business is severely impacted.