Password policy was used before the password duration expired. In order to manage these older devices, users may have to resort to writing down all old passwords in case they need to log into an older device. Requiring a very strong password and not requiring it be changed is often better. However, this approach does have a major drawback: if an unauthorized person acquires a password and uses it without being detected, that person may have access for an indefinite period. It is necessary to weigh these factors: the likelihood of someone guessing a password because it is weak, versus the likelihood
Most recent common ancestor Most recent common ancestor In biology and genealogy, the most recent common ancestor (MRCA, also last common ancestor (LCA), or concestor) of any set of organisms is the most recent individual from which all the organisms are directly descended. The term is also used in reference to the ancestry of groups of genes (haplotypes) rather than organisms. The MRCA of a set of individuals can sometimes be determined by referring to an established pedigree. However, in general, it is impossible to identify the exact MRCA of a large set of individuals, but an estimate of the time at which the