The correct answer is E. None of the above.
The VL bus, ISA bus, and PCI bus are all legacy bus specifications that have been superseded by newer, faster bus specifications. The fastest common bus specification today is the PCI Express bus, which can transfer data at speeds of up to 32 gigatransfers per second (GT/s).
The VL bus (VESA Local Bus) was a computer bus standard developed by the Video Electronics Standards Association (VESA) in 1992. It was designed to provide a high-speed connection between the CPU and video adapter, and it was used in many high-end PCs of the 1990s. The VL bus had a maximum data transfer rate of 33 MHz and a bandwidth of 32 bits.
The ISA bus (Industry Standard Architecture) was a computer bus standard developed by IBM in 1981. It was the standard bus for IBM PCs and compatibles for many years, and it was used in a wide variety of devices, including expansion cards, hard drives, and sound cards. The ISA bus had a maximum data transfer rate of 8 MHz and a bandwidth of 8 bits.
The PCI bus (Peripheral Component Interconnect) was a computer bus standard developed by Intel in 1992. It was designed to replace the ISA bus, and it was used in many PCs of the 1990s and early 2000s. The PCI bus had a maximum data transfer rate of 33 MHz and a bandwidth of 32 bits.
The PCI Express bus (PCIe) is a computer bus standard developed by Intel in 2003. It is a serial bus, which means that data is transferred one bit at a time, rather than in parallel, as with the VL bus, ISA bus, and PCI bus. The PCIe bus has a maximum data transfer rate of 32 GT/s and a bandwidth of 16 lanes.
The PCIe bus is the fastest common bus specification today, and it is used in most modern PCs. It is backward compatible with PCI devices, so PCI cards can be used in PCIe slots. However, PCIe cards cannot be used in PCI slots.