| Default router admin address | Commonly 192.168.1.1 or 192.168.0.1 |
| Wi-Fi frequency bands | 2.4 GHz, 5 GHz, and 6 GHz (Wi-Fi 6E) |
| Zigbee max devices per network | Up to 65,000 nodes in theory (Zigbee Alliance specification) |
| HDMI ARC vs. eARC | eARC supports lossless audio formats like Dolby Atmos |
| 4K pixel count | 3840 × 2160 (approx. 8.3 million pixels) |
| Matter standard launch year | 2022 (Connectivity Standards Alliance) |
Why Home Tech Terminology Matters
Setting up a router, pairing a smart bulb, or connecting a soundbar shouldn't require an engineering degree. But the instruction manuals, app screens, and packaging you encounter during setup are packed with abbreviations and technical terms that can make a straightforward task feel overwhelming. This glossary cuts through that noise.
The terms below are organized by category — networking, smart home, and audio/video — so you can jump to whatever you're working on right now. For a broader walkthrough of the hardware involved, see our beginner's guide to routers, hubs, and smart devices.
SSID
The name of a Wi-Fi network as it appears on your device's connection list. You set it in your router's administration settings and can change it at any time.
DHCP
A protocol that automatically assigns a unique IP address to each device joining your network. It handles address management in the background so you don't have to configure devices manually.
DNS
A system that translates domain names (like a website address) into the numeric IP addresses that computers use to communicate. Your router typically handles DNS automatically.
Zigbee
A low-power wireless protocol used by many smart home devices. Zigbee devices form a mesh network and generally require a compatible hub to connect to your Wi-Fi and smartphone app.
Matter
An open smart home connectivity standard designed to make devices from different manufacturers work together seamlessly without proprietary bridges or adapters.
HDMI ARC
A feature on designated HDMI ports that allows audio to travel from a TV back to a soundbar or receiver over the same cable, reducing cable clutter. eARC is an enhanced version supporting higher-quality audio formats.
Mesh Wi-Fi
A home Wi-Fi system that uses two or more router nodes working together to deliver consistent wireless coverage across a larger area than a single router typically can.
Ethernet
A wired networking connection between a device and a router or network switch, using a physical cable. Ethernet connections are typically faster and more stable than Wi-Fi.
Hub (Smart Home)
A central device that bridges smart home gadgets using protocols like Zigbee or Z-Wave to your home Wi-Fi network. Without a hub, those devices usually can't connect to your phone or smart home app.
4K Resolution
A display resolution standard of approximately 3840 × 2160 pixels. Displaying 4K content requires a compatible screen, source, and appropriate HDMI cable bandwidth.
Wi-Fi Band
The radio frequency range your Wi-Fi network operates on. Common bands are 2.4 GHz (longer range, slower) and 5 GHz (shorter range, faster). Wi-Fi 6E adds a 6 GHz band for even higher performance.
Z-Wave
A low-power wireless protocol used in smart home devices, similar to Zigbee but operating on a different frequency. Z-Wave devices also form mesh networks and generally require a hub for full functionality.
Networking Terms Explained
Your home network is the foundation everything else depends on. These are the terms you'll see most often during router setup, Wi-Fi troubleshooting, and device connection.
| Default router admin address | Commonly 192.168.1.1 or 192.168.0.1 |
| Wi-Fi frequency bands | 2.4 GHz, 5 GHz, and 6 GHz (Wi-Fi 6E) |
| Zigbee max devices per network | Up to 65,000 nodes in theory (Zigbee Alliance specification) |
| HDMI ARC vs. eARC | eARC supports lossless audio formats like Dolby Atmos |
| 4K pixel count | 3840 × 2160 (approx. 8.3 million pixels) |
| Matter standard launch year | 2022 (Connectivity Standards Alliance) |
SSID (Service Set Identifier) is simply the name of your Wi-Fi network — the one you tap on your phone when connecting. You can rename it to anything you like in your router's settings.
DHCP (Dynamic Host Configuration Protocol) is the system your router uses to automatically assign an IP address to each device that connects. You rarely need to touch this setting, but you'll see it referenced if you're doing any manual network configuration.
DNS (Domain Name System) translates human-readable web addresses like example.com into numeric IP addresses computers understand. Your router handles this automatically, though some users switch to alternative DNS servers for speed or privacy reasons.
Band refers to the radio frequency your Wi-Fi uses: 2.4 GHz travels farther and penetrates walls better; 5 GHz is faster but shorter-range. Many modern routers broadcast both simultaneously (called dual-band). Some newer routers also include a 6 GHz band (Wi-Fi 6E). For a full breakdown, see our complete home network setup guide.
Ethernet is a wired connection between a device and your router via a cable. Wired connections are generally faster and more stable than Wi-Fi — useful for game consoles, desktop computers, and streaming devices.
Smart Home Protocol Terms
Smart home devices use wireless communication protocols to talk to each other and to your phone or hub. Knowing which protocol a device uses helps you understand what other equipment it needs.
Wi-Fi vs. Zigbee vs. Z-Wave: Which Does Your Device Use?
Smart home devices don't all use the same wireless technology. Wi-Fi devices connect directly to your router — no hub needed, but they consume more power. Zigbee and Z-Wave devices are more efficient and form resilient mesh networks, but they do require a compatible hub. Check your device's packaging or spec sheet before purchasing to know what supporting equipment you'll need.
Zigbee and Z-Wave are low-power wireless protocols designed specifically for smart home devices like lights, locks, and sensors. Unlike Wi-Fi, they form a mesh network — each device can relay signals to others, extending range throughout your home. Devices using these protocols typically require a compatible hub.
Matter is a newer, open smart home standard backed by major technology companies. Its goal is cross-brand compatibility: a Matter-certified device should work with different ecosystems without extra bridges. Adoption is growing but not yet universal.
Hub (also called a bridge or controller) is the central device that connects smart home gadgets on protocols like Zigbee or Z-Wave to your Wi-Fi network and phone app. Without it, those devices can't be controlled remotely. For a deeper look at how these pieces fit together, see our guide on setting up a smart home from scratch.
Mesh Wi-Fi uses multiple router nodes placed around your home instead of a single router. The nodes communicate with each other to provide consistent coverage in areas a single router might not reach.
Audio and Video Connection Terms
Setting up a TV, soundbar, or home theater system introduces its own set of connector and format terms. Here are the ones that come up most during installation.
HDMI ARC (Audio Return Channel) is a feature on specific HDMI ports — usually labeled on the TV — that lets audio travel back from the TV to a connected soundbar or receiver over the same HDMI cable, eliminating extra cables. A newer version, eARC (Enhanced ARC), supports higher-quality audio formats like Dolby Atmos.
4K refers to a display resolution of approximately 4,000 horizontal pixels (typically 3840 × 2160). To see 4K content, you need a 4K-compatible TV, a 4K source (streaming service, player, or console), and an HDMI cable rated for 4K bandwidth. If you want to understand how TV panel technology affects picture quality, our article on OLED, QLED, and LCD screen technology explains the differences clearly.
Optical audio (also called TOSLINK) is an older cable type that carries digital audio using light. It's less common on new TVs but still found on soundbars and A/V receivers as a fallback connection when HDMI ARC isn't available.
For tips on organizing all those cables once everything is connected, our cable management guide offers practical approaches that don't require a renovation.