A subnetwork, or subnet, is a logical, visible subdivision of an IP network. The practice of dividing a network into two or more networks is called subnetting. Computers that belong to a subnet are addressed with a common, identical, most-significant bit-group in their IP address.
Introduction. Vasco da Gama was born in 1460 to a wealthy Portuguese family in Sines, Portugal. Vascoâs father was also an explorer and was supposed to make the epic journey from Portugal to India that would eventually make his son famous.
Columbus, an Italian navigator sailing for the Spanish Crown, sought a westward route to Asia, which led him to coin the misnomer  West Indies  for the Antilles, where he made landfall. The newly discovered landmass came to be known in Europe as the New World.