Category: Tech – This Explainer

Hypervisor Explainer A hypervisor is the software layer that allows one physical computer to host multiple virtual machines. It sits between the hardware and the virtual systems, organizing access to the processor, memory, storage, and network hardware. Each virtual machine receives a defined share of those resources and behaves as though it has its own computer, even though many machines may be sharing one host. When a virtual machine needs…

DNS Resolution Explainer DNS resolution is the process that turns a web address people can remember, such as a site name, into an internet address that a device can use. Computers send traffic to numerical IP addresses, not to words. The Domain Name System, usually called DNS, supplies the lookup service that connects those two forms of address. It works quietly before a browser loads a page, an app reaches…

DNSSEC Explainer DNSSEC is a set of extensions that helps a DNS resolver check whether a domain name answer is authentic. DNS already helps turn a name into an address, but the original system was designed without a built-in way to prove that a response had not been altered along the way. DNSSEC adds digital signatures to DNS records so a validating resolver can detect forged or modified data when…

HTTP/3 Explainer HTTP/3 is a newer version of the web protocol that browsers and websites use to exchange pages, images, video, and application data. Its most important change is the transport underneath it. Earlier modern web connections typically use HTTP/2 over TCP. HTTP/3 uses QUIC, a transport protocol built on UDP, to make connections more resilient when a network is slow, busy, or changing. QUIC combines functions that were once…

WebAssembly Explainer WebAssembly, often shortened to Wasm, is a compact format that lets software run efficiently inside a web browser and in other supporting environments. It is not a replacement for the web page itself. HTML still provides structure, CSS handles appearance, and JavaScript remains widely used for interaction. WebAssembly gives developers another way to run performance-sensitive parts of an application. A developer usually does not write WebAssembly by hand.…

Browser Sandbox Explainer A browser sandbox is a security boundary that limits what a browser process can do if it encounters unsafe content. Browsers regularly open code and media from websites that may be unfamiliar or hostile. Instead of letting every tab and helper component operate with the full authority of the user’s computer account, modern browsers divide work into processes with deliberately limited permissions. A page renderer is often…

Zero-Trust Network Explainer A zero-trust network is a security approach built around continuous verification. Instead of assuming that a person or device is trustworthy simply because it is inside an office network, the system checks the request, identity, device condition, and context before granting access. The phrase does not mean trusting nobody in a personal sense; it means not treating network location as proof that access should be allowed. Traditional…

VPN Tunnel Explainer A virtual private network, or VPN, creates an encrypted connection between a device and a VPN server. When the tunnel is active, the device packages its traffic so it can travel through the public internet to that server. The server removes the outer protective layer and forwards the traffic toward its destination, while return traffic travels back through the same protected connection. Encryption is the key feature.…

API Gateway Explainer An API gateway is a service that sits in front of one or more application services and provides a single entry point for requests. Instead of a mobile app or website needing to know every internal service address, it can send a request to the gateway. The gateway then checks the request and routes it to the appropriate service, sometimes combining answers before returning a response. This…

Microservices Communication Explainer Microservices are small, independently deployable parts of an application. Each service handles a focused capability, such as accounts, payments, inventory, or notifications. Because the services run separately, they need clear ways to exchange requests and events without becoming tightly tied to one another. A common method is a direct request through an API. One service calls another service’s endpoint, waits for a response, and uses the result.…

Event-Driven Architecture Explainer Event-driven architecture organizes a system around events: records that something meaningful happened. An event might say an order was placed, a sensor changed state, a file finished processing, or a customer updated an address. The service that creates the event publishes it without needing to know every service that will use it. Other components subscribe to the event and react. A payment event might update accounting, send…

Message Queue Explainer A message queue is a holding place for work that one part of a system sends to another. A producer places a message in the queue, and a consumer retrieves it when ready. This prevents the producer from having to wait while every task is completed. For example, a website can accept an order and place a receipt request, inventory update, or image-processing job on a queue.…