> IPv4 is usually denoted as <octet>.<octet>.<octet>.<octet> (ff.0.1.2).
However, it can also be denoted as hex 0xff000102 or a number as in decimal notation. However, 4.2BSD's inet_aton() allowed IPs as decimal <octet>.<24bit-decimal> or <octet>.<octet>.<16bits-decimal>.