Default password home routers. Leaving such a password on devices available to the public is a huge security risk. Some devices (such as wireless routers) will come with unique default router username and passwords printed on a sticker, which is more secure option than a common default password. Some vendors will however derive the password from the device's MAC address using a known algorithm, in which case the password can be also easily reproduced by attackers. To access internet connected devices on a network, a user must know its default IP address. Manufacturers typically use 192.168.1.1, however, some will have variations on
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