Networking & Internet Questions

IP stands for Internet Protocol. An IP address is a unique numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication, acting much like a home mailing address.

SSL (Secure Sockets Layer) and its more modern successor, TLS (Transport Layer Security), are the cryptographic protocols designed to provide communications security over a computer network. They encrypt the data sent over the internet so that only the intended recipient can read it. When a website uses these protocols, a "padlock" icon appears in the browser's address bar.

Safari is the web browser developed by Apple. First released in 2003, it is the default browser on all Apple devices, including Macs, iPhones, and iPads. It is known for its speed and energy efficiency, particularly on laptops.

Google created the Chrome web browser, first released in 2008. It was designed to be fast, simple, and secure, and it quickly became the most used web browser in the world, largely due to its integration with Google services.

NFC stands for Near Field Communication. It is a short-range wireless technology that allows devices to share data when they are very close (usually within 4 centimeters). It is the technology behind "tap-to-pay" services like Apple Pay.

MQTT stands for Message Queuing Telemetry Transport. It is a lightweight messaging protocol designed for "Internet of Things" (IoT) devices that have limited power and need to communicate over unreliable networks.

The F5 key is the standard shortcut used to refresh or reload a webpage in almost every Windows-based web browser. In some browsers, pressing Ctrl + F5 performs a "hard refresh," which clears the cache and downloads all page elements from the server again.

CDN stands for Content Delivery Network. It is a geographically distributed group of servers which work together to provide fast delivery of internet content. By storing copies of a website on servers around the world, a CDN ensures that a user in Japan doesn't have to wait for data to travel all the way from a server in New York.

LAN stands for Local Area Network. It is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, or office building.

Port 80 is the standard port used for HTTP (unencrypted web traffic). When you visit a website that doesn't use SSL (HTTPS), your browser automatically connects to the server through Port 80.

A Web Browser is a software application used for accessing information on the World Wide Web. When a user enters a web address (URL), the browser retrieves the necessary content from a web server and displays it on the user's screen. Popular browsers today include Google Chrome, Safari, and Microsoft Edge.

ICMP stands for Internet Control Message Protocol. It is used by network devices (like routers) to send error messages and operational information. The most common use of ICMP is the "Ping" command, which checks if a computer is reachable.

A Load Balancer is a device or software that acts as a reverse proxy and distributes network or application traffic across a number of servers. This ensures that no single server becomes overwhelmed, which improves the responsiveness and availability of applications.

HTML stands for HyperText Markup Language. It is the standard markup language used to create the structure of web pages. It uses "tags" to tell the web browser how to display text, images, and other content.

LTE stands for Long-Term Evolution. It is a standard for high-speed wireless communication for mobile devices, offering much faster speeds than the older 3G networks.

DHCP (Dynamic Host Configuration Protocol) is the network protocol used to automatically assign IP addresses to devices when they connect to a network. Without DHCP, you would have to manually type in a unique IP address for every phone, laptop, and smart lightbulb in your house.

WorldWideWeb (later renamed Nexus) was the first-ever web browser. it was created by Tim Berners-Lee in 1990 while he was working at CERN. It was also the first WYSIWYG (What You See Is What You Get) HTML editor.

The primary function of a router is to connect multiple networks together and "route" data packets between them. In a home, it connects your devices (like phones and laptops) to the Internet.

The "at" symbol (@) is used in email addresses to separate the user's name from the domain name (e.g., user@example.com). It was chosen by Ray Tomlinson in 1971 as a clear way to indicate where a user was located on a network. Today, it is also a universal symbol for social media handles and tagging.

WebRTC (Web Real-Time Communication) is the primary technology and protocol used for real-time video and audio calls directly within web browsers without needing extra plugins. It is what powers video in browser-based apps like Google Meet and Discord.