How often should administrators and network users be required to change their password?

Which of the following had the greatest influence on opening the internet to the generly public

Which of the following factors would your hypothetical supervisor look at when deciding whether to test a biological material sample for dna? the amount of other evidence you have implicating a suspect in a crime the annual budget for the crime lab both of the above none of the above; you would almost always order a test

Which operating system is a version of linux?