Yes, or you can put it behind your router which ever works for you. If they are on your network they must be on the same IP range right? Go to http://www.oxid.it and get Cain & Abel, free tool that has a sniffer, activate the sniffer and then click on the sniffer TAB, then click on the blue plus sign to see everyones IP with their corresponding MAC addresses and their OU Fingerprint.