Bandwidth vs Latency

Bandwidth

Bandwidth is the maximum amount of data a network connection can transfer per second.
It is usually measured in Megabits per second (Mbps).
Think of a highway:
- A highway with six lanes can carry more cars at the same time than a road with two lanes.
- More lanes represent higher bandwidth.
For a 1 GB file, ideal download times are approximately:
- 100 Mbps: 80 seconds.
- 1 Gbps: 8 seconds.
Higher bandwidth allows you to transfer more data per second.

In the highway analogy, latency is the time one car takes to reach its destination, regardless of how many lanes the highway has.
In networking, we often measure Round Trip Time (RTT): the time a signal takes to reach a server and return.
In online gaming, an action with 20 milliseconds of latency reaches the server much faster than one with 200 milliseconds.
A 1 Gbps wireless 5G connection can have higher latency than a 100 Mbps wired fiber connection.
Latency depends on:
- Distance.
- Routing.
- Congestion.
- Processing delays.
Latency does not depend on bandwidth alone.