Measuring Internet Quality: Latency, Jitter and Packet Loss

Two internet connections with the same bandwidth can feel very different in daily use. The difference lies in quality metrics that rarely appear in adverts: latency, jitter and packet loss.

Latency

Latency is the time it takes a packet to travel to a destination and back, measured in milliseconds. Lower latency makes applications feel responsive. Distance sets a minimum — light in fiber travels about 200 km per millisecond — but congestion and routing add to it.

Jitter

Jitter is the variation in latency from packet to packet. Voice and video applications buffer audio and video to smooth jitter; when jitter is high, calls become choppy and robotic.

Packet loss

Packet loss is the percentage of packets that never arrive. Even 1% loss can noticeably degrade voice and video calls and slow down file transfers, because lost data must be retransmitted.

Why these metrics matter

• Voice and video: sensitive to jitter and loss.
• Trading and real-time systems: sensitive to latency.
• Cloud applications: affected by all three, especially during interactive use.
• Large transfers: slowed significantly by packet loss.

How dedicated access helps

Uncontended capacity reduces congestion-driven latency spikes and packet loss. Well-engineered routing keeps paths short and stable.

Measuring at your site

Ping and traceroute tests give a basic picture. Continuous monitoring tools provide a more accurate view over time.

Use the data

DIA monthly reports include latency and loss trends, helping you correlate user complaints with network behaviour and plan improvements.

The bottom line

Ask providers about latency, jitter and packet loss — not just bandwidth. These metrics determine how your applications actually feel to users.

Learn more about Dedicated Internet Access (DIA) from UbiFi, or talk to our team.