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Several other terms have been used to describe this class of device, including '''data access switch''', '''tool aggregator''', '''net tool optimizer''', and '''distributed filter tap'''.
== Function ==▼
▲== Function ==
[[Image:Net Optics Director.PNG|380px|thumb| Standard [[Data monitoring switch]] with 1U chassis, high port density]]
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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