Lan switching

Hi Guys,

I need a circuit to toogle 2 ethernet connections.
Should i use relays or can you suggest any semiconductor equivalent.


ETH -0 ---SW-------Network-A
toogle only one line enabled at a time.
ETH-1 ---SW------Network-B


Your suggestions will be greatly appretiated !!

Regards,
Johnnyxtc

Relays would certainly be the easiest.

exposed Ethernet conductors could pick up noise.