some storage drives may be accessible over a computer network many computing platforms are provided with one or more communication interfaces 210 according to the function intended of the computing platform for example a personal computer is often provided with a high speed serial port rs 232 rs 422 etc an enhanced parallel port u201c epp u201d and one or more universal serial bus u201c usb u201d ports the computing platform may also be provided with a local area network u201c lan u201d interface such as an ethernet card and other high speed interfaces such as the high performance serial bus ieee 1394 computing platforms such as wireless telephones and wireless networked pda 39 s may also be provided with a radio frequency u201c rf u201d interface with antenna as well in some cases the computing platform may be provided with an infrared data arrangement u201c irda u201d interface too computing platforms are often equipped with one or more internal expansion slots 211 such as industry standard architecture u201c isa u201d enhanced industry standard architecture u201c eisa u201d peripheral component interconnect u201c pci u201d or proprietary interface slots for the addition of other hardware such as sound cards memory boards and graphics accelerators additionally many units such as laptop computers and pda 39 s are provided with one or more external expansion slots 212 allowing the user the ability to easily install and remove hardware expansion devices such.