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== Function ==
<!-- Deleted image removed: [[Image:Net Optics Director.PNG|380px|thumb| Standard Data monitoring switch with 1U chassis, high port density {{deletable image-caption}}]] -->
A data monitoring switch typically provides 24 to 38 ports in a 1U 19-inch chassis, with higher port density devices expected in the future. Ports may be dedicated as network inputs or tool outputs, or may be configurable as either. Network input ports may be paired to provide in-line connectivity (integrated [[Network tap|Tap]] function), or independent to take input from external network Taps or network switch [[SPAN port]]s. Some devices have the ability to interconnect chassis to configure logical systems with hundreds of ports.
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