What is bandwidth?
Definition
Bandwidth is the maximum data rate a network connection can carry. It is not the same as throughput, the rate you actually measure, or latency, the delay before data arrives. On a WiFi network, bandwidth can also mean channel width, the slice of radio spectrum a transmission uses.
Bandwidth explained
Two meanings travel under one word. The first is capacity: the size of the internet uplink, such as a 1 Gbps line into a hotel. The second is RF channel width: 20, 40, 80 or 160 MHz in the 5 GHz band. Wider channels raise peak link speed but leave fewer non-overlapping channels and more exposure to interference in dense deployments.
Most perceived slowness is contention rather than a small pipe. A network with a 1 Gbps uplink and 400 concurrent users each drawing 3 Mbps is asking for 1.2 Gbps. Buying a bigger line helps only if the radio side can deliver it, which is why venues often over-buy bandwidth and under-tune density.
Guest networks manage contention with controls rather than hope. Quality of Service (QoS) prioritises traffic classes, traffic shaping smooths peaks, per-user rate limits stop one device from taking the lot, and time limits end idle sessions. Throughput, measured at the device, is the number that tells you whether those controls are working.
Need more than a definition?
Talk to our team about how Purple combines guest WiFi, captive portals, RADIUS, and analytics into a single platform that runs on the access points you already own.