NETWORKING RELATED QUESTIONS AND ANSWERS I

51: What should you do before you attempt to discharge a CRT?
A: Turn power off before removing power source.

52: High humidity can cause what type of problem?
A: It can cause electrical current to bleed around the chips causing shorts.

53: When using an anti-static wrist strap, the best place to attach the grounding clip is?
A: To the frame of the PC

54: On a laser printer, what moves the toner from the drum to the paper?
A: Transfer Corona

55: The default I/O address for COM1 is?
A: 3F8

56: ESD occurs between two objects that have?
A: Different electrical potentials

57: How many pins does a serial port connector have?
A: 9

58: What function does the power supply perform?
A: Converts AC current into DC current.

59: On a dot matrix printer, a good image on one side of the page and a poor image on the other side of the page would mean what?
A: Platen out of alignment

60: A mouse begins to move erratically jumping around when moved. What is the problem?
A: Dirty mouse

61: Which AT command is used to reset a modem?
A: ATZ

62: What information is stored in CMOS or PRAM?
A: Date and time. CPU and memory size characteristics. Floppy and hard disk configuration data.

63: The term "ESD" refers to?
A: Electrostatic Discharge.

64: How do you dispose of a PC battery?
A: Check the battery label information for special disposal procedures.

65: How can you limit the chance of AC line noise?
A: Install the computer system on its own power circuit.

66: You suspect a virus has entered your computer. What will not be affected by the virus?
A: CMOS or ROMBIOS

67: What will happen when shadowing is enabled in a computers BIOS?
A: Instructions stored in various ROM chips are copied into extended memory.

68: What does an IRQ allow interface cards to do?
A: Interrupt the CPU to request service.

69: Which ports use IRQ4?
A: COM1 and COM3

70: What uses IRQ3?
A: COM2 and COM4

71: What IRQ is assigned to the floppy disk controller?
A: IRQ6

72: How can you tell if the CMOS backup battery is going bad?
A: Computer will start losing the date and time.

73: How many intelligent devices can be daisy-chained together from a standard SCSI controller?
A: Seven (8 if you include the adapter card)

74: If a SCSI card is controlling both external and internal devices where would the terminators need to be located?
A: The terminating resistor must be disabled on the controller, and both the last internal and last external devices on the chain must be terminated.

75: What is the default resolution of a VGA monitor?
A: 640x480

76: What does TSR stands for?
A: Terminate and Stay Resident.

77: Which allows faster access; RAM, ROM, or virtual memory?
A: RAM

78: When installing a high capacity hard disk drive on older machines, what might you have to upgrade?
A: ROM System BIOS

79: What is parity error?
A: Indicates a problem with data stored in memory (Bad RAM).

80: What type of a connector does a parallel cable have?
A: DB25

81: A parallel printer cable has a DB25 connector on one end and a _____________ connector on the other end.
A: Centronics

82: Software or firmware embedded in chips on the circuit board which determines compatibility.
A: BIOS

83: The design of the ISA bus only allows for support of 16 MB of memory. If that is the case, how can a computer support 64MB of memory?
A: By page swapping

84: Hard drives start out essentially blank. They need to have their sectors defined on each track. In addition, the sectors have to be marked so that data can later be found and retrieved. This process is called?
A: Low level formatting

85: LPT2 uses what I/O address?
A: 278

86: What are I/O addresses and what do they do?
A: Communication ports between a device and the CPU.

87: An error detection technique consisting of a cyclic algorithm performed on each block or frame of data by both sending and receiving modems.
A: Cyclic Redundancy Checking (CRC)

88: How many programs may reside in the HMA?
A: Only One at a time.

89: This step of the Electrographic Printing process puts a uniform negative charge on the drum, erasing the electrical image of the previous page.
A: Conditioning

90: Serial cables can be longer than parallel ones, with the maximum recommended length for a serial cable being?
A: 50 ft.

91: This topology uses a hub instead of a single trunk cable. Individual workstations extend from the hub, each connected by its own cable. Signals are broadcast to all stations or passed from station to station.
A: Star

92: How many transceivers can be integrated onto a Thicknet backbone?
A: 100

93: Consider the following scenario: You are looking at a laser printer that prints perfectly formed letters that smear easily. Using what you know about the EP process, what assembly would you suspect?
A: Fuser

94: What was the first CPU to come with a built-in coprocessor?
A: 486DX

95: DC2000, DAT, and QIC80 are all examples of what?
A: Tape media

96: What type of motherboard has a soft power-on switch?
A: ATX

97: What occurs during the writing part of the EP print process?
A: An image of 0Vdc charge is ‘written’ to the drum with a laser

98: The first CPU to have a 64bit data path was?
A: 586

99: What are the 6 steps of Laser Printer process?
A: cleaning
charging
writing
developing
transfer
fusing

100: Where do you terminate SCSI?
A: At both ends