Hello All, Behind every interview question there is a concern or another question. Your job is to process the question thinking about what the interviewer's concern might be. In other words, why is the interviewer asking you this question? click here: http://www.hardware-guru.net/Interview/job_interview.htm<http://www.hardware-guru.net/System_design/zigbee.htm> The Hardware-Guru.net Team www.hardware-guru.net Join our group at LinkedIn - http://www.linkedin.com/e/gis/27414/21D383473C17 Fact: Hardware-Guru.net has over 11000 subscribers worldwide