Radio Waves vs. Full-Duplex Copper & Fiber
Wi-Fi operates on a shared medium using the CSMA/CA protocol (Carrier Sense Multiple Access with Collision Avoidance). Because it is Half-Duplex, only one device can transmit at any microsecond.
Cat 6+ Ethernet operates in Full-Duplex with dedicated twisted pairs, avoiding wireless medium contention and RF interference.
Why Wi-Fi Degrades Gaming & Video Calls
- •CSMA/CA Protocol: Devices take turns waiting to transmit over the air.
- •Wall Attenuation: Concrete, glass, and tiles degrade radio QAM modulation.
- •Hidden Retransmissions: Collided wireless packets are resent, compounding queue lag.
Technical Comparison: Wi-Fi vs. Cat 6+ Ethernet
| Feature | Wi-Fi (2.4 / 5 / 6 GHz) | Ethernet Cable (Cat 6+) |
|---|---|---|
| Transmission Mode | Half-Duplex (One device at a time) | Full-Duplex (Simultaneous send & receive) |
| Jitter & Stability | High variation (2 – 25 ms fluctuation) | Extremely stable jitter (typically < 1 ms on local segment) |
| Packet Loss | Vulnerable to walls, microwaves and neighboring channels | Highly resistant to typical RF and airborne interference |
| Base Latency (Local Ping) | 2 – 8 ms added to router | Typically < 1 ms to domestic router |
| Local Queue Bufferbloat | Accumulates in 802.11 radio buffer | Direct queue managed by switch kernel |
3-Step Guided A/B Testing Workflow
Step 1: Test on Wi-Fi
Select [Wi-Fi 5 GHz] tag and click START TEST to capture your baseline.
Step 2: Connect Cable
Connect direct Ethernet to your router, disable Wi-Fi, and select [Ethernet Cable] tag.
Step 3: Open A/B Comparator
SpeedPulse will automatically calculate the exact percentage of lag and jitter reduction.