1.A processor has 8-bit data bus width. How many times does it needed to read a
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Question
1.A processor has 8-bit data bus width. How many times does it needed to read a 28-bit data into the processor? What if the processor has a 32-bit data bus?
2.USB is the most common serial bus. It can connect many computer peripherals. Is it possible to use it as the video interface, why?
3.A computer has an AGP bus that connects to the graphic card. It has a PCI bus that connects SCSI. It also has an ISA that connects keyboard and mouse. In addition, it has an IDE bus that connects a hard drive and CD-ROM. Why is this multiple-bus computer still considered as single bus Neumann architecture?
4.How does a USB-booting attack work? How to prevent such attacks?
5. A mouse with illuminate light was attached to a light weight laptop computer. However the mouse does not function. When plugging the same mouse to a desktop computer, it works perfectly. What could be the reason that caused the problem?
6.A bootable USB flash drive can setup a virtual machine on top of the host computer. On the virtual machine, a user may be able to access the files and data on the host computer. This is a convenient feather but sometimes it may cause threats to the security. Describe how to effectively address this problem?
7.Describe the sending and receiving processes of a NIC card
Explanation / Answer
1 Answer
The main reason both the 8088 and 8086 were 16 bit processors is because they had 16 bit ALUs internally.
Generally we consider as SIMD processor that can perform 8 16-bit ads at the same time is not a "128 bit" processor.
Note that operating on multiple 16 bit words is not the same as operating on a single 128 bit word that is understood as a whole.
Main difference is that there is no carry between the individual 16 bit adders, which would be required to call it a 128 bit adder002Ex.
If Processor has 32 bit data bus
If it is an address bus is of size 32 bits, then that means it can hold up to 232 numbers and it hence can refer up to 232 bytes of memory = 4GB of memory(that is equal to).
4. Answer
Generally it works like Cold-booting refers to when power is cycled “off” and then “on” without letting the operating system shut down cleanly that means in the CPU , we can set as reset button.
This can be work as A removable disk can immdtly uses the light weight operating system, which is used dump the contents of pre-boot physical memory to file.
These can be Prevent using writing of Re-programming USB peripherals.
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