MAC address (2nd layer) is unique for one machine & is a life-time identifier set by the manufacturer. IP address ( 3rd layer) could be set and changed any time. Example: IP 134.6.100.16, MAC address: ef.00.c5.a6.bd.98
linmeimei(林妹妹)
(#238023@0) Last Updated: 2001-10-26 This post has been archived. It cannot be replied.