Understanding Your Network
Why video calls freeze and what you can do about it
How networks work
When you make a video call on Zoom, Teams, or Google Meet, your voice and video are broken into tiny pieces called packets. These packets travel from your device through your WiFi, router, internet provider, and across the internet to reach everyone else on the call. Then the same journey happens in reverse for their audio and video to reach you.
This round trip happens continuously, dozens of times per second. For a smooth call, packets need to arrive quickly, consistently, and completely. When any part of this chain struggles, you experience the all-too-familiar symptoms: frozen faces, choppy audio, "Can you hear me now?"
Why video calls are so demanding
Unlike loading a webpage or downloading a file, video calls are real-time. There's no room for retries or delays. If a packet arrives late, it's useless; the conversation has already moved on. This makes video conferencing uniquely sensitive to network problems that other activities can hide.
You might have fast internet that handles Netflix perfectly, yet still struggle on calls. That's because streaming video buffers ahead: it downloads 30 seconds of content before you need it. Video calls can't do that. They need packets right now.
Three network characteristics matter most for call quality:
- Latency: How long packets take to make the round trip. High latency creates that annoying delay where people talk over each other.
- Jitter: How consistent that timing is. Even with decent average latency, inconsistent timing makes audio sound robotic and video stuttery.
- Packet loss: When packets go missing entirely. This causes audio dropouts and video freezing.
Where problems happen
Network issues can originate anywhere along the path:
- Your device: High CPU usage or low memory can make your computer struggle to encode video fast enough.
- Your WiFi: Weak signal, interference, or a crowded channel can cause packets to be lost or delayed.
- Your router: Bufferbloat and congestion from other devices can introduce latency and jitter.
- Your ISP: Outages, congestion, or routing issues between you and the video service.
- The service itself: Sometimes Zoom, Teams, or Meet has problems on their end.
Network Weather helps you pinpoint which segment is causing your problem, so you know whether to move closer to your router, restart your equipment, call your ISP, or just wait it out.
Explore the topics
Click any topic below to learn more about what it means, why it matters, and what you can do about it.
Connection Quality
- Latency The time it takes for data to travel from your device to a server and back.
- Packet Loss When pieces of data go missing on the way to their destination.
- Jitter Inconsistency in how quickly packets arrive.
- Bufferbloat Hidden lag caused by overstuffed network buffers.
- DNS The internet's address book that turns website names into addresses.
- Double NAT When two routers both try to manage your network, causing connection problems.
- IPv6 The newer internet addressing system gradually replacing the old one.
WiFi Signal
- Signal Strength How strong your wireless connection is.
- Signal-to-Noise The difference between your WiFi signal and background interference.
- WiFi Noise Background interference that can drown out your WiFi signal.
- WiFi Protocol The WiFi generation (4, 5, 6, 6E, or 7) your connection uses.
- WiFi Channels Different frequencies your router can use.
- Channel Width How much of the airwaves your WiFi uses at once.
- WiFi Interference Nearby networks and devices competing for the same airwaves.
- Auto Channel Letting your router pick its own WiFi channel automatically.
- BSSID The unique identifier for a specific WiFi access point.
- AWDL Interference How Apple features like AirDrop can cause brief WiFi slowdowns.
WiFi Roaming
- Transmit Power How loudly your access points broadcast, and why louder is not always better.
- BSS Transition A feature that helps devices switch smoothly between access points.
- Minimum RSSI A setting that disconnects devices once their signal gets too weak.
- Minimum Data Rate A setting that stops slow, distant devices from dragging down your whole WiFi.
- Fast Roaming A feature that speeds up handoffs as you move between access points.
WiFi Config
- Group Rekey How often your WiFi refreshes its shared encryption keys.
- DTIM Period A WiFi timing setting that affects battery life on phones and laptops.
- U-APSD A WiFi power-saving feature that can cause reliability problems on some devices.
- Mesh Backhaul The wireless link that connects mesh WiFi units to each other.
Security
- WiFi Security How your wireless network protects against eavesdropping.
- Protected Management Frames Protection that stops attackers from kicking devices off your WiFi.
- UPnP A convenience feature that lets devices open holes in your firewall automatically.
- Intrusion Detection A watchdog that spots and blocks known attack patterns on your network.
- DHCP Guard Protection against rogue devices handing out bad network addresses.
- Open Ports Doorways into your network that can expose you if left open.
- WPS A push-button WiFi setup feature with well-known security flaws.
- Remote Management Whether your router's admin page is reachable from the internet.
- SSL Certificate The certificate that keeps your router's admin login encrypted.
- ASUS AiProtection ASUS's built-in security suite that blocks malicious sites and intrusions.
- ASUS AiCloud An ASUS remote access feature that is safer left turned off.
Port & Cable Health
- Port Health How your Ethernet ports and cables are performing overall.
- Slow Port When a wired connection runs far below its full speed.
- Half Duplex When a port can only send or receive at one time, not both at once.
- Link Flapping A connection that keeps dropping and reconnecting.
- SFP Fault A failing fiber optic module in your router or switch.
Network Config
- ASN The number that identifies which provider carries your internet traffic.
- MAC Address A unique ID assigned to every network device.
- MTU The largest chunk of data that can be sent at once.
- Default Subnet The address range your home network uses, which can clash with VPNs.
- STP Priority A setting that decides which switch leads your network and prevents loops.
- Client Isolation A setting that keeps devices on a network from talking to each other.
- WAN Failover A backup internet connection that kicks in during outages.
- Firmware The software inside your router that needs regular updates.
Device Health
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