The network is put into operation after it is built. During operation, the network is constantly monitored and checked for errors and problems. A network redesign might be required if troubleshooting problems become too frequent or even impossible to manage. For example, at least a partial redesign might be necessary if the new network is consistently congested. Solutions might include increasing bandwidth, adding filters, upgrading to devices with more capacity, moving servers that are in high use, and so forth. Hopefully this scenario can be avoided if all previous design steps have been completed properly.
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