How bandwidth works
Data travels across several network links between your device, a server and any intermediary. End-to-end capacity is constrained by the narrowest link on that path. Actual transfer speed can be lower because of congestion, protocol overhead and server limits.
A 10 Mbps path can carry at most 1.25 MB each second because one byte contains eight bits. A 100 MB response therefore needs at least 80 seconds under ideal conditions. Pay attention to capitalization: Mbps means megabits per second, while MB/s means megabytes per second.
Bandwidth vs throughput vs latency
| Term | What it measures | Common unit |
|---|---|---|
| Bandwidth | Maximum data capacity | Mbps or Gbps |
| Throughput | Data transferred in practice | Mbps or MB/s |
| Latency | Delay before data arrives | Milliseconds |
More bandwidth helps when you transfer large files or run concurrent requests. It doesn’t remove latency, so a small API response can still feel slow even when the connection has plenty of capacity.
Bandwidth and proxies
A proxy server receives data from the target and forwards it to you. The slowest segment between you, the proxy and the target limits throughput. Concurrent requests also share available capacity, so adding workers won’t keep increasing total transfer speed indefinitely.
Proxy services may use “bandwidth” informally to mean total data transferred, measured in GB, rather than a per-second rate. This matters for traffic-based plans used for web scraping.
To control usage:
- Measure request and response sizes, including headers and retries.
- Skip unneeded images, video and fonts when the task only needs HTML or JSON.
- Set concurrency below the point where throughput stops increasing.
- Respect site limits. If a website, CDN or firewall returns 429 Too Many Requests, slow down instead of adding more bandwidth.
Bandwidth on FlashIP
FlashIP rotating residential proxies and mobile proxies use traffic packages billed per GB. Package sizes, validity periods and per-GB prices are listed on the residential pricing and mobile pricing pages.
FAQ
Is bandwidth the same as internet speed?
No. Bandwidth is capacity, while the speed you observe is throughput. Latency, congestion and server response time also affect how fast a request completes.
How do I calculate proxy bandwidth usage?
Add the bytes sent and received across all requests, then include retries and any page assets your client downloads. Billing rules vary, so check which traffic your proxy plan counts.
Does a proxy increase my bandwidth?
No. A proxy changes the route and the IP address websites see, but it can’t raise your local connection’s capacity. It can also become another bottleneck if its available capacity is lower than yours.