Dualcomm ETAP-2003 10/100/1000Base-T Gigabit Ethernet Network TAP

This device seems to have asymmetric pass-through performance - around a gigabit in one direction but only ~400 Mbps in the other.

Is nil. Or very very nearly nil. I have ATT Fiber 1000 and you can see...those are within the range of my test results without the tap inline (in this case between the ATT modem and my main router). I am blown away. Ive used several other consumer grade 1Gbe taps and notice anywhere from 5-25% decrease in speed. So for the price this is badass! VERY pleased. And its super convenient that I could power it off the ATT modems USB port!

No fancy features, but solid reliable performance as TAP

Perfect. A little bit more expensive due to its metal casing.

The item was as described and was up and running right out of the box. Just what I expected

the switch arrived actually earlier than anticipated and with its unique feature of mirroring between 2 ports allows me to tap my network as I need it. With the USB power supply it is also perfect to go wherever your investigation leads you.

Perfect tool, it has saved me a lot of time troubleshooting network issues.

Works great! Ive been using it to monitor all the traffic on my home network and its been very reliable. Currently sits between my modem and router and causes no slow downs or latency problems. My internet speeds get up to 250Mb/s.

I do a lot of low level Ethernet packet analysis and this is a simple solution to use along with Wireshark for monitoring network traffic. Since you cant find hubs anymore this is a better solution that a switch which can hide traffic for things other than broadcasts.

Perfect tool for finding pesky problems when you dont have a switch you can trust to mirror a port.