Shared hosting and shared networks divide finite bandwidth capacity among every user connected to the same infrastructure.
Fair-Use Approaches
Rather than hard, rigid caps, many providers use dynamic allocation, giving more capacity to users when the network isn't busy and moderating usage during peak congestion.
Why One User's Spike Can Affect Others
On shared infrastructure, an unusually large traffic spike from one account can theoretically affect available capacity for others — a key reason hosting providers monitor for abnormal usage patterns.
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