Most LAN performance issues are not caused by failures, but by unnoticed bottlenecks. A single overloaded switch, an old cable, or a mismatched port speed can silently slow down an entire segment.
The problem is visibility. LAN bottlenecks rarely announce themselves clearly, so they persist until users complain.
Understanding where LAN bottlenecks typically occur helps engineers troubleshoot faster. A practical overview of LAN structure and flow is explained at comsiam.com/lan
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