Network Tap
A network tap is an external monitoring device
that mirrors the traffic that passes between two network nodes. A tap (test
access point) is a hardware device inserted at a specific point in the network
to monitor data.
A network tap usually has four ports. The first
two ports connect to the two network nodes at either end of the wire that the
tap is monitoring. The additional ports connect to the monitoring devices that
receive the mirrored packet flows.
Network tap manufacturers build their products to
be resilient and transparent so as to minimize or eliminate the effect they can
have on production traffic. Taps designed to mirror the traffic without
impeding the flow of the production traffic.
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| NETWORK TAP CIRCUITS |
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| NETWORK TAP MACHINE |
Tap manufacturers also strive to
make the device resilient in the event of a hardware failure. Some taps will
draw power from the network itself rather than rely on its own power supply.
Many taps are engineered to allow traffic to continue passing through them even
if the tap itself stops functioning.
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