Gigabit Ethernet was designed for an era where most traffic exited the network. Today, internal workloads dominate. Backups, file sync, virtualization, and collaboration tools generate sustained east–west traffic.
When multiple devices share a 1Gbps fabric, latency spikes appear before throughput limits are obvious. This creates the illusion of “random slowness.”
Understanding traffic direction is critical. If most data never touches the WAN, upgrading internet bandwidth will not solve LAN congestion.
More technical breakdowns on internal traffic patterns are shared here:
https://comsiam.com
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