One laptop two networks

I have one laptop used to connect to two different peer-to-peer type
networks one being a building automation system and the other is a key
cabinet network. Both networks are non server environments, both use static
IP and different subnet mask also both have the same workgroup name. The
networks consist of mutiple enternet enable devices and a couple of
workstations.

To switch between the two networks I go into the TCP/IP properties and
change the IP/subnet address manually and plug the patch cable into the hub
for the desired network. For security reasons to two networks can not be
hardwired together. Neither network has internet connections. Some of the
people who use the laptop for connecting to the networks are not computer
savy as for as changing the TCP/IP properties.

My question is there an easier way of doing this? Can two networks be
configured on one LAN card and easily switched between the two networks. I
am thinking my only option is to change the subnet mask to match on both
networks and insure I do not have any conflicting IP addresses. Not being a
networking guru I not sure what row the subnet mask plays in the operation
of the two networks.

Any comments or thoughts is appreciated.


.

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