Wi-Fi Standards Explained (802.11 a/b/g/n/ac/ax)
- Networking Fundamentals & OSI Model
- TCP/IP Model
- Network Topologies
- IP Addressing & Subnetting
- Routing Algorithms & Protocols
- Switching Concepts
- Transport Layer Protocols (TCP & UDP)
- Application Layer Protocols
- Network Security & Firewalls
- Wireless Networking & Wi-Fi
- Network Address Translation (NAT)
- DNS Deep Dive
- Congestion Control & Flow Control
- Error Detection & Correction
- Network Devices
- VPN & Tunneling
- Load Balancing & CDN Networking
- Socket Programming
- Network Troubleshooting Tools
- Physical Layer & Transmission Media
- Data Link Layer & MAC Addressing
- Ethernet Protocol
- ARP (Address Resolution Protocol)
- ICMP Protocol
- Unicast, Multicast, Broadcast and Anycast
- Proxy Servers
- Port Numbers Reference
- Network Performance Metrics
- Quality of Service (QoS)
- Software-Defined Networking (SDN)
- HTTP/2 and HTTP/3 Overview
- 5G and Mobile Networks
- IoT Networking Basics
- VoIP Networking Basics
What the 802.11 Naming Means
Wi-Fi is standardized under the IEEE 802.11 family, with each letter suffix representing a generation offering higher speeds, better range, or improved efficiency than the one before it.
The Evolution of Wi-Fi Standards
| Standard | Approx. max speed | Frequency band |
|---|---|---|
| 802.11a | 54 Mbps | 5 GHz |
| 802.11b | 11 Mbps | 2.4 GHz |
| 802.11g | 54 Mbps | 2.4 GHz |
| 802.11n (Wi-Fi 4) | 600 Mbps | 2.4 GHz and 5 GHz |
| 802.11ac (Wi-Fi 5) | Multi-Gbps | 5 GHz |
| 802.11ax (Wi-Fi 6) | Multi-Gbps, more efficient | 2.4 GHz and 5 GHz |
2.4 GHz vs 5 GHz: A Practical Trade-off
2.4 GHz travels farther and penetrates walls better, but is slower and more crowded (many devices, from microwaves to Bluetooth, use this same band). 5 GHz offers much faster speeds with less interference, but covers a shorter range and is blocked more easily by walls and obstacles.
Why Wi-Fi 6 (802.11ax) Focuses on Efficiency, Not Just Speed
Wi-Fi 6's biggest improvement isn't raw top speed - it's handling many simultaneous devices more efficiently, which matters far more in today's homes and offices packed with dozens of connected devices than a slightly higher theoretical maximum speed would.
Why "Wi-Fi 4/5/6" Naming Was Introduced
The Wi-Fi Alliance introduced simple generational numbers (Wi-Fi 4, 5, 6) specifically because names like "802.11ac" were confusing for ordinary consumers to compare - a device's box can now say "Wi-Fi 6" instead of an unfamiliar technical code.