this post was submitted on 30 Dec 2023
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Oh yeah, having headroom for microbursts is great, and factors into the precieved speed of the connection. It's a requirement for most users to have that headroom to make the connection feel fast. But a lot more goes into the apparent "speed" of the connection than that. Having quick DNS and high-speed routing to the wireline internet connection is also important, but harder for most to grasp what will actually achieve that goal versus other products.
The main thing is that headroom for burst traffic is mostly shared, since the channel gets used and then freed almost as fast. In this way, others can burst traffic into the channel shortly afterwards, with no detrimental effect.
The headroom doesn't need to be gigabits of capability in most cases. 300-450mbps is often very sufficient and may be more than what is required, depending on the usage.