(1)網(wǎng)絡產(chǎn)品的固有特性所致 (2)網(wǎng)絡產(chǎn)業(yè)的技術特性所致 (3)網(wǎng)絡產(chǎn)品的版權保護所致 (4)網(wǎng)絡企業(yè)的兼并與收購所致