Which utility is used to verify that another computer is online and connected to the network?
1. TRACERT
2. TELNET
3. >>PING
4. FTP
Explanation : The PING utility (for example, ping 208.160.120.17) is used to send test data packets to verify connectivity to another computer using ICMP. The Internet Control Message Protocol (ICMP) is part of the TCP/IP suite of protocols. It is an error-reporting protocol. PING sends an ICMP Echo Request to a target name (like computer2) or IP address. The resulting ICMP Echo Reply verifies that a TCP/IP configuration is set up properly and that the destination host is online and connected to the network.
TRACERT is also a TCP/IP utility. It uses ICMP echo requests to trace the route a data packet takes to its destination. The TRACERT command displays the hop count (also called the metric, the number of routers the signal must pass through to get to the destination), the time each hop takes (in milliseconds), the name of the computer or router passed through (optional), and the IP address of each router in the hop. TRACERT works with IP addresses, host names, and domain names. Like PING, TRACERT can verify a system is online, but that is not its primary purpose.
FTP (File Transfer Protocol) is a utility program that allows the bi-directional transfer (uploading and downloading) of files between two networked hosts. A small FTP client program runs on the remote computer and accesses a larger FTP server running on a host. FTP is not used to verify that another system is online.
The TELNET utility allows a computer to connect to a UNIX host by emulating a terminal (such as a DEC VT100) and establishing a remote command-line window. TELNET is not used to verify that another system is online.
Objective: Networks
Sunday, December 16, 2007
Printers and Scanners: The Final Installation Step
You are installing a USB laser printer for a user. The user's computer is running Windows XP Professional. You install the toner cartridge, place paper in the paper tray, and connect the USB cable to the printer and to the computer.
What additional step do you need to take?
1. >>Install the printer software as instructed by the manufacturer.
2. Use Add or Remove Programs to install the printer.
3. Use Windows Update to download the most current driver.
4. Use Device Manager to install the printer driver.
Explanation : You should follow the manufacturer's instructions for installing the printer. Some printers have an executable on the CD-ROM that must be run before connecting the Universal Serial Bus (USB) cable. Others are installed using the standard procedure of either allowing Plug and Play to detect the printer or adding a printer through the Add Printer Wizard.
You do not need to use Windows Update to download the most current driver. Driver updates should be obtained from the manufacturer. Also, at this point no driver has been installed, so you would not be able to update the driver.
You should not use Add or Remove Programs to install the printer. Add or Remove Programs is a utility used to manage Windows components and applications. It is not used to install printer drivers.
You should not use Device Manager to install the printer driver. When you first set up a printer, you need to run the manufacturer's software or use Add Printer Wizard to install the printer. If you need to update the driver at a later time, you can do so by using Device Manager.
Objective: Printers and Scanners
What additional step do you need to take?
1. >>Install the printer software as instructed by the manufacturer.
2. Use Add or Remove Programs to install the printer.
3. Use Windows Update to download the most current driver.
4. Use Device Manager to install the printer driver.
Explanation : You should follow the manufacturer's instructions for installing the printer. Some printers have an executable on the CD-ROM that must be run before connecting the Universal Serial Bus (USB) cable. Others are installed using the standard procedure of either allowing Plug and Play to detect the printer or adding a printer through the Add Printer Wizard.
You do not need to use Windows Update to download the most current driver. Driver updates should be obtained from the manufacturer. Also, at this point no driver has been installed, so you would not be able to update the driver.
You should not use Add or Remove Programs to install the printer. Add or Remove Programs is a utility used to manage Windows components and applications. It is not used to install printer drivers.
You should not use Device Manager to install the printer driver. When you first set up a printer, you need to run the manufacturer's software or use Add Printer Wizard to install the printer. If you need to update the driver at a later time, you can do so by using Device Manager.
Objective: Printers and Scanners
Laptops: Inverters
What is the purpose of an inverter in a laptop computer?
1. The inverter limits the voltage required by the laptop.
2. >>The inverter controls power to the LCD panel.
3. The inverter converts AC power to DC.
4. The inverter converts power to the correct setting for the locale.
Explanation : The inverter is part of a laptop's display. It controls how much power is sent to the fluorescent lamps in the Liquid Crystal Display (LCD) panel.
The inverter does not convert power to the correct setting for the locale. When traveling internationally, you need to ensure that you have a power cable that can accept the input voltage of the locale to which you are traveling. Otherwise, you need to purchase a power converter. You might also need a plug adapter so that the adapter fits the socket.
The inverter does not convert alternating current (AC) to direct current (DC).
The inverter does not affect the amount of voltage required by the laptop.
Objective: Laptops and Portable Devices
1. The inverter limits the voltage required by the laptop.
2. >>The inverter controls power to the LCD panel.
3. The inverter converts AC power to DC.
4. The inverter converts power to the correct setting for the locale.
Explanation : The inverter is part of a laptop's display. It controls how much power is sent to the fluorescent lamps in the Liquid Crystal Display (LCD) panel.
The inverter does not convert power to the correct setting for the locale. When traveling internationally, you need to ensure that you have a power cable that can accept the input voltage of the locale to which you are traveling. Otherwise, you need to purchase a power converter. You might also need a plug adapter so that the adapter fits the socket.
The inverter does not convert alternating current (AC) to direct current (DC).
The inverter does not affect the amount of voltage required by the laptop.
Objective: Laptops and Portable Devices
Printers and Scanners: Multiple pages going through the rollers
A laser printer experiences frequent paper jams. You determine that it is trying to pull multiple pieces of paper through at a time.
What is the most likely problem?
1. Paper is too light-weight.
2. >>There is too much humidity
3. The paper sensor is damaged.
4. The paper roller is dirty.
Explanation : The major cause of a printer pulling multiple pages through at a time is either high or low humidity. When the air is humid (over 50% humidity), pages stick together because they are moist. When the air is too dry (under 25% humidity), pages generate static electricity, which causes them to cling together. Another potential reason multiple sheets of paper will be pulled through is that the separation tray is worn.
The rollers are configured to grab a single sheet of paper, regardless of its weight. Therefore, paper that is too light-weight is not the most likely cause of the problem.
A damaged sensor is not the most likely cause of multiple pages being picked up. A damaged sensor is more likely cause the paper not to move through correctly.
A dirty paper roller will cause marks on the page. It will not cause multiple pages to be picked up.
Objective: Printers and Scanners
What is the most likely problem?
1. Paper is too light-weight.
2. >>There is too much humidity
3. The paper sensor is damaged.
4. The paper roller is dirty.
Explanation : The major cause of a printer pulling multiple pages through at a time is either high or low humidity. When the air is humid (over 50% humidity), pages stick together because they are moist. When the air is too dry (under 25% humidity), pages generate static electricity, which causes them to cling together. Another potential reason multiple sheets of paper will be pulled through is that the separation tray is worn.
The rollers are configured to grab a single sheet of paper, regardless of its weight. Therefore, paper that is too light-weight is not the most likely cause of the problem.
A damaged sensor is not the most likely cause of multiple pages being picked up. A damaged sensor is more likely cause the paper not to move through correctly.
A dirty paper roller will cause marks on the page. It will not cause multiple pages to be picked up.
Objective: Printers and Scanners
Safety & Environment: Installling a Video Adapter
You are replacing a video adapter in a computer. What is the first step you should take?
1. >>Shut down the computer.
2. Unplug the display from the power source.
3. Unplug the computer from the power source.
4. Disconnect the display from the computer.
Explanation : The first step you should take is to shut down the computer. You should always shut down a computer before unplugging it to ensure that files are saved and closed properly.
There is no need to unplug the display from the power source. You are not working on the display; you are installing a new video adapter inside the computer's case.
You should disconnect the display from the computer, but only after you have shut down the computer. You should not disconnect a display while the computer is running.
You should unplug the computer, but only after you have shut down the computer.
Objective: Safety and Environmental Issues
1. >>Shut down the computer.
2. Unplug the display from the power source.
3. Unplug the computer from the power source.
4. Disconnect the display from the computer.
Explanation : The first step you should take is to shut down the computer. You should always shut down a computer before unplugging it to ensure that files are saved and closed properly.
There is no need to unplug the display from the power source. You are not working on the display; you are installing a new video adapter inside the computer's case.
You should disconnect the display from the computer, but only after you have shut down the computer. You should not disconnect a display while the computer is running.
You should unplug the computer, but only after you have shut down the computer.
Objective: Safety and Environmental Issues
Security: Virus Scans
What is the first step you should take before you run a virus scan?
1. Create an emergency anti-virus boot disk.
2. Run the ScanDisk utility.
3. Log out of the network.
4. >>Upgrade your virus definitions and virus testing engine.
Explanation : It is important that you first upgrade your virus definitions and your virus scan engine before you run a virus scan. Doing so will ensure you are scanning for all currently known viruses and worms. If you do not update the virus definition files first, you may miss a new virus.
Creating an emergency anti-virus boot disk also needs to be done prior to the virus scan, but this step should be performed after upgrading the virus definitions.
It is not necessary to run the ScanDisk utility or to log out of the network before running a virus scan.
Objective: Security
Sub Objective(s): Identify the fundamentals and principles of security
1. Create an emergency anti-virus boot disk.
2. Run the ScanDisk utility.
3. Log out of the network.
4. >>Upgrade your virus definitions and virus testing engine.
Explanation : It is important that you first upgrade your virus definitions and your virus scan engine before you run a virus scan. Doing so will ensure you are scanning for all currently known viruses and worms. If you do not update the virus definition files first, you may miss a new virus.
Creating an emergency anti-virus boot disk also needs to be done prior to the virus scan, but this step should be performed after upgrading the virus definitions.
It is not necessary to run the ScanDisk utility or to log out of the network before running a virus scan.
Objective: Security
Sub Objective(s): Identify the fundamentals and principles of security
Printers and Scanners: Primary corona vs transfer roller vs fuser
Which laser printer component applies a strong uniform negative charge to the drum?
1. >>Primary corona wire
2. Transfer roller
3. Fusing assembly
4. Piezoelectric nozzle
Explanation : The laser printer's primary corona wire (also called the charging roller) applies a strong negative charge to the photosensitive drum. This is the first step in preparing a page to be printed.
The fusing assembly uses heat and pressure to make the image on the paper permanent. This is the last step in the process.
The transfer roller (also called the transfer corona) applies a positive charge to the paper so that the negatively charged toner particles will be attracted to the positively charged areas on the paper. Because the laser reduced the negative charge in the areas to be printed, only those areas will have a positive charge after the transfer roller completes its task. Therefore, only those areas attract the toner.
A piezoelectric nozzle is used in an ink jet printer, not in a laser jet printer.
Objective: Printers and Scanners
1. >>Primary corona wire
2. Transfer roller
3. Fusing assembly
4. Piezoelectric nozzle
Explanation : The laser printer's primary corona wire (also called the charging roller) applies a strong negative charge to the photosensitive drum. This is the first step in preparing a page to be printed.
The fusing assembly uses heat and pressure to make the image on the paper permanent. This is the last step in the process.
The transfer roller (also called the transfer corona) applies a positive charge to the paper so that the negatively charged toner particles will be attracted to the positively charged areas on the paper. Because the laser reduced the negative charge in the areas to be printed, only those areas will have a positive charge after the transfer roller completes its task. Therefore, only those areas attract the toner.
A piezoelectric nozzle is used in an ink jet printer, not in a laser jet printer.
Objective: Printers and Scanners
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