Monday, August 01, 2011

GUIDs and their mystery

I learnt in my college that GUIDs are almost unique. You can be quite sure that they are unique. I had the information that GUIDs have component which is mapped to MAC address or say Network Interface Card (NIC). Well if you also had same information then it is no more valid in today’s fast changing world. While we were happily generating GUIDs and using it all over the place, the algorithm to generate it has gone through several revisions. If you are interested to know which version is in use currently, then it is v4.0 and it does not use NIC/MAC address. More details on GUID generation is here.