Managed switches provide a lot of value in a network. First, they can let you know the status of the network. If an abnormal condition occurs, a managed switch can send you a message telling you so. This includes things like high bandwidth consumption, unexpected port connection, and even power supply failure. Additionally, a managed switch can implement redundancy. This can be critical if an Ethernet cable gets cut, unplugged, or plugged into the wrong port, or even if the switch is powered down. Managed switches are intelligent enough to find another path to the destination, or even block communications that should not be occurring on a specific port in order to prevent serious network issues.
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