Term 391
Public IP address
A globally unique IP address assigned to a device that allows it to communicate directly over the internet.
Acronym study
Terms 391–420 of 595 Google PCA 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 391
A globally unique IP address assigned to a device that allows it to communicate directly over the internet.
Term 392
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 393
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 394
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 395
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 396
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 397
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 398
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 399
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 400
A read replica is a copy of a database that is used only to handle read queries, taking load off the primary database.
Term 401
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 402
A receiver is a hardware device or software component that accepts incoming signals, data, or transmissions from a sender over a communication channel.
Term 403
Redis is an open-source, in-memory data structure store used as a database, cache, and message broker for high-speed data access.
Term 404
A trusted, always-active component of a computer's operating system that enforces security policies by checking every access request to files, memory, or devices before allowing it.
Term 405
Regional refers to a deployment strategy where cloud resources are distributed across multiple geographic areas to improve availability, reduce latency, and meet compliance requirements.
Term 406
A regional load balancer distributes incoming network traffic across resources located in multiple geographic regions to ensure high availability, low latency, and fault tolerance at a global scale.
Term 407
Regional Persistent Disk is a durable, block-level storage option in Google Cloud that automatically replicates data across two zones in a region to protect against zone failures.
Term 408
An RJ45 connector is the clear plastic plug at the end of an Ethernet cable that connects computers, routers, and switches to form a wired network.
Term 409
A relational database organizes data into tables with rows and columns, where each table relates to others using unique keys, allowing efficient storage, retrieval, and manipulation of structured information.
Term 410
Remote Desktop Protocol is a technology that lets you connect to and control another computer from a different location, as if you were sitting in front of it.
Term 411
A Reserved Instance is a billing discount applied to your usage of virtual machines or other compute resources when you commit to using a specific configuration for a one- or three-year term.
Term 412
A logical container in Microsoft Azure that holds related resources for an application or solution, enabling unified management, security, and billing.
Term 413
Resource hierarchy is the structured, parent-child ordering of cloud resources that governs access control, policy inheritance, and resource organization across a cloud platform.
Term 414
A reverse proxy is a server that sits in front of one or more backend servers, intercepting client requests and forwarding them to the appropriate server, then returning the server's response to the client as if it came from the reverse proxy itself.
Term 415
RJ45 is a standardized physical connector used to plug Ethernet cables into computers, routers, switches, and other networking devices.
Term 416
A route is a path that data takes through a network from one device or network to another, determined by routing protocols and configured rules.
Term 417
Route 53 is Amazon Web Services’ cloud-based Domain Name System (DNS) web service that translates human-readable domain names into IP addresses and routes end-user requests to internet applications.
Term 418
A Route 53 health check is a feature of Amazon Route 53 DNS service that monitors the availability and performance of an endpoint, such as a web server, from multiple global locations to automatically route traffic away from failures.
Term 419
A route table is a set of rules, called routes, that determine where network traffic from a subnet or virtual network is directed.
Term 420
Routing Information Protocol (RIP) is a distance-vector routing protocol that routers use to exchange information about network paths, using hop count as its metric to find the shortest route.