Your ISP advertises 100 Mbps. Your speed test shows 72. Neither number is wrong—they're measuring different things. Here's why the gap exists and what you can actually do about it.
Network problems announce themselves as symptoms—slow, broken, unreachable. The tools that reveal the actual disease range from a simple pulse check to a full-body scan.
Three metrics, three different questions. TTFB measures your server's speed, response time measures delivery completion, and load time measures when users can actually use your page. Knowing which to optimize changes everything.
Every millisecond of delay has a cause. Some you can fix, some you can't, and one type causes most of the chaos.
Latency is delay. Jitter is chaos. Why your video calls can handle consistent lag but fall apart when timing becomes unpredictable.
Latency is the delay between action and response—the gap where user frustration lives. Learn what causes it, why milliseconds matter, and how to minimize the tax every network request pays.
Packet loss is data vanishing mid-flight—your voice erased mid-sentence, your game character teleported. Here's why it happens, how much your applications can tolerate, and what you can do about it.
When your network can't deliver everything at once, something has to wait. QoS decides what—and that decision shapes whether your video call is crystal clear or unwatchable.
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