Router Specs Explained: Every Term You Need to Know

Router spec sheets are full of acronyms and numbers that sound technical but are rarely explained. Here’s every term you’ll see when shopping for a router — plain English, no fluff.

Wi-Fi Standards

• Wi-Fi 5 (802.11ac) — Previous generation. AC followed by a number (AC1200, AC1750) indicates combined dual-band speed rating. Still works fine, but no OFDMA.
• Wi-Fi 6 (802.11ax) — Current standard. AX followed by a number (AX1500, AX4400). Adds OFDMA and BSS Coloring for better efficiency with many devices. Minimum recommended for new purchases in 2026.
• Wi-Fi 6E — Wi-Fi 6 extended into the 6 GHz band. Less interference, more available channels. Tri-band with 6 GHz support.
• Wi-Fi 7 (802.11be) — Latest standard. BE followed by a number (BE3100, BE5500). Adds Multi-Link Operation (MLO), 320 MHz channels, and 4K-QAM for dramatically lower latency and higher throughput.

Speed & Throughput Terms

• Combined speed rating (e.g., AX3000) — The theoretical sum of all band speeds. AX3000 = 574 Mbps on 2.4 GHz + 2,402 Mbps on 5 GHz. Not a real single-device speed.
• Spatial streams (2×2, 4×4) — The number of simultaneous data streams per band. More streams = higher throughput per client. A 4×4 router can push more data to a single device than a 2×2 router on the same band.
• MU-MIMO (Multi-User MIMO) — Lets the router communicate with multiple devices simultaneously rather than taking turns. Essential for multi-device households.
• OFDMA (Orthogonal Frequency Division Multiple Access) — Wi-Fi 6+ feature that subdivides channels to serve multiple devices within a single transmission. Dramatically improves efficiency on congested networks.

Bands & Frequencies

• 2.4 GHz band — Longer range, more interference (shares spectrum with microwaves, baby monitors, neighbors). Lower speeds but better penetration through walls.
• 5 GHz band — Shorter range, much less interference, significantly faster speeds. Use this for devices near the router.
• 6 GHz band (Wi-Fi 6E/7) — Cleanest band with virtually no legacy device interference. Short range but lowest latency. Best for gaming devices that support it.
• Dual-band — Has 2.4 GHz and 5 GHz. Standard on all current routers.
• Tri-band — Adds a third band (usually a second 5 GHz or a 6 GHz). More capacity for more devices or dedicated backhaul in mesh systems.

Ports & Physical Connectivity

• WAN port — The input port that connects to your modem. Usually 1 Gbps; premium routers have 2.5 Gbps or 10 Gbps WAN ports for multi-gig ISP plans.
• LAN ports — Ethernet output ports for wired devices. Typically 4 ports at 1 Gbps each on consumer routers.
• USB port — Present on many mid-range routers. Used for network-attached storage (NAS) via USB drive, shared printing, or 4G/5G LTE backup.

Network Features

• QoS (Quality of Service) — Traffic prioritization. Lets you tell the router which devices or traffic types get bandwidth first. Essential for gaming on congested networks.
• BSS Coloring (Wi-Fi 6+) — Lets overlapping networks coexist without collisions by “coloring” transmissions from different networks. Reduces interference in apartment buildings.
• MLO (Multi-Link Operation, Wi-Fi 7) — Devices can use multiple bands simultaneously. Lower effective latency, better throughput, more resilient connections.
• Beamforming — Focuses the wireless signal toward specific devices rather than broadcasting in all directions equally. Improves range and signal quality for supported clients.
• DHCP — The service that assigns IP addresses to devices on your network automatically. Every home router runs this.

Security Terms

• WPA3 — Current Wi-Fi security standard. Use this if your router and devices support it. More resistant to brute-force attacks than WPA2.
• WPA2 — Previous security standard, still secure with a strong password. Universal compatibility. Use if your older devices don’t support WPA3.
• Firewall — Router-level protection against unauthorized incoming connections. All consumer routers have this — NAT (Network Address Translation) provides a basic firewall by default.
• Guest network — Isolated network for visitors. Keeps guests on a separate subnet from your main devices — important for security.