21. COM 4 uses which I/O port?

A. 2F8H
B. 3F8H
C. 3E8H
D. 2E8H
E. None of the above

22. What type of FRU is a SCSI host adapter?

A. CPU
B. I/O card
C. video card
D. hard drive
E. None of the above

23. How many DMA channels are in an AT-machine?

A. 3
B. 4
C. 7
D. 8
E. None of the above

24. Which provides the fastest data access time?

A. RAM
B. ROM
C. CD-ROM
D. Hard disk
E. None of the above

25. When configuring a new network interface card for installation, which of the following would be a valid I/O address?

A. 378
B. 2F8
C. 3F8
D. 360
E. None of the above