best comptia a study guide 2013

... substantial speedup by doubling its RAM. B. The swap space may be safely eliminated. C. The administrator should use the swapon command to activate more use of the existing swap space. D. Available ... computers—which are actu- ally far more powerful than the mainframes of just a few years ago. Because of its mainframe heritage, Unix (and hence also Linux) scales well to perform today’s demanding ... Chapter 4 for more information. 8. B. In 2001, all major Debian-based distributions use not just the Debian package system but many Debian component packages as a starting base. Debian is available...

Ngày tải lên: 16/08/2013, 16:24

... reading the book. The answers to this test appear on a separate page after the last question. Each answer also includes an explanation and a note telling you in which chapter this material appears. In ... this training material and specifically disclaims any warranties of merchantability or fitness for a particular purpose. CompTIA makes no guarantee concerning the success of persons using any such ... workgroups. A workgroup is a collection of individuals (a sales department, for example) who share the same files and databases over the LAN. Figure 1.1 shows an example of a small LAN and its...

Ngày tải lên: 10/12/2013, 16:15

... financial and publicity-related implications of an effective DoS attack are hard to measure—at best they are embarrassing, and at worst they are a deathblow. Companies reliant on Internet traffic and ... Instant Messaging (IM), Oracle, and almost any other password that is trans- mitted in the clear. Another tool, mailsnarf, will grab any and all e-mail messages it sees, and store them in a standard ... Accounts and create a new account. In the appropriate screens, enter e-mail sam.carter@sgc.com, name Sam Carter, mail.destinationdomain.com as the mail server, and anything in the username/password...

Ngày tải lên: 25/03/2014, 11:10

... aspects and importance of safety and environmental issues Identify potential safety hazards and take preventative action Use Material Safety Data Sheets (MSDS) or equivalent documentation and ... upgrade and optimize hardware, software and data security for example:  BIOS  Smart cards  Authentication technologies  Malicious software protection  Data access (basic local security ... you’ll find sample exams for each of the A+ exams. Take these practice exams just as if you were actually taking the A+ exams (without any reference material). Depending on what edition of...

Ngày tải lên: 10/08/2014, 12:20

... bidirectional parallel port has one important advantage over a standard parallel port: It can both transmit and receive data. These parallel ports are capable of interfac- ing with such devices as external ... and Characteristics of Adapter Cards An adapter card (also known as an expansion card) is simply a circuit board you install into a computer to increase the capabilities of that computer. Adapter ... multithreading (SMT). SMT takes advantage of a modern CPU’s super- scalar architecture. Superscalar processors are able to have multiple instructions operating on separate data in parallel. HTT-capable...

Ngày tải lên: 10/08/2014, 12:21

... ThinkPad series of laptops? A. Touchpad B. Touchball C. Touchpoint D. Touchway 5. Which laptop accessory allows you to power your laptop from a car or airplane? A. AC adapter B. DC adapter C. Battery ... examining some preventative maintenance recommen- dations and issues. Exam Essentials Know how many pins an IDE/PATA/ATA-5/ATA-6 cable has. A cable for use with these technologies has 40 pins. You’re ... Another primary concern is heat. Restricted space means less airflow, meaning parts can heat up and overheat faster. To overcome space limitations, laptop parts are physically much smaller and lighter,...

Ngày tải lên: 10/08/2014, 12:21

... see what updates are available. It compares the update list to the updates that have already been applied to the computer or have been refused by the administrator. 3. If updates are available, ... you make a backup, ensure that you can read from it. If you’ve just backed up a small amount of data, restore it to an alternate location and make sure you can read it. If you are backing up ... HAL, or the Hardware Abstraction Layer, is the translator between the hardware and the operating system. 20. B. Task Manager will show you a list of running processes and applications and allow...

Ngày tải lên: 10/08/2014, 12:21

... local and wide area. Local wireless is usually available within a particular room or building only. Once you leave that area, it is no longer available. Local wireless has an operating range ... through a layer, the layer tacks its information TABLE 8.1 Topologies—Advantages and Disadvantages Topology Advantages Disadvantages Bus Cheap. Easy to install. Difficult to reconfigure. Break in ... data, and controls the flow of data. It can also receive and translate data into bytes for the CPU to understand. It communicates at the Physical layer of the OSI model and comes in many shapes...

Ngày tải lên: 10/08/2014, 12:21

... potential safety hazards and take preventative action  Use Material Safety Data Sheets (MSDSs) or equivalent documentation and appropriate equipment documentation  Use appropriate repair ... body and keeps it at a zero charge. Figure 10.3 shows the proper way to attach an anti-static strap. There are several varieties of wrist straps available. The one in Figure 10.3 uses a banana ... in any way for exercising their rights under the Occupational Safety and Health Act. Safety Plans It’s recommended that your company create and follow a workplace safety plan. Having a safety...

Ngày tải lên: 10/08/2014, 12:21

... were all the rage a few years ago and are still popular today. Also readily available are infrared keyboards and printers. Perhaps some of the most useful infrared devices are keyboards for PDAs. ... occur and the device is unavailable. Certain DMA channels are assigned to standard AT devices. DMA is no longer as pop- ular as it once was, because of advances in hardware technology, but it is ... access (DMA) allows a device to bypass the CPU and place data directly into RAM. To accomplish this, the device must have a DMA channel devoted to its use. All DMA transfers use a special area of...

Ngày tải lên: 10/08/2014, 12:21

... active partition. Often this is also a primary partition and the first partition created on a hard drive. 4. D. A logical partition is any partition that has a drive letter. It can be primary, active, ... to install over an application that already exists, or when you’re trying to replace a file that already exists but that another application is using. When you’re installing an application, ... fixed easily, or the fix may result in only a temporary solution. Usually such a case calls for a complete formatting and reinstalla- tion of the OS and applications, and restoration of data. However,...

Ngày tải lên: 10/08/2014, 12:21

Ngày tải lên: 10/08/2014, 12:21

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20

Ngày tải lên: 14/08/2014, 20:20