members/yash-yash/
1 Connecting more than one computer is mostly discussed here , in this forum,
1a. Your problem seems to be on the highly professional side, and in my lifetime , I will never come across /access a setup as mentioned by you.
2. Mostly modem/
router/WIFI /switches/hub/USB connectors etc are discussed for a home network.
3.
Gigabit speed devices are too much when most of us are on 256Kbps/2 Mbps speed !
4.Anyway, I suggest , you check up your mother board details, and other hardware with these programs and update the drivers .
A patch has also been recommended in the web.
Unknown Device Identifier - Freeware Download
http://www.zhangduo.com/mydrivers.exe
5. Please give a diagram type details about your set up and the number of computers/LAN/WAN/
VPN etc , so others can also chip in !
6ethernet card installed from
TP-Link 10/100/1000
Please mention model number.
For my reference :
How Gigabit Ethernet Works | Hardware Secrets