Wysiwyg

Virus

Virtual Memory

VESA Local Bus

Storage

Static RAM

SIMM Socket

SIMM

SDRAM

Refresh Rate

Refresh

RAM

Program

Plug-n-Play

A set of specifications developed by Intel that allows a computer to automatically detect and configure a device and install the appropriate device drivers.

A set of computer instructions that are organized to perform a certain function, such as a word or data processor, games, and internet browser.

(Random-Access Memory) - A memory cell configuration that holds data for processing by a central processing unit (CPU). Random means the CPU can retrieve data from any address within RAM. See also Memory.

Refreshing maintains data stored in DRAM. The process of refreshing electrical cells on a DRAM component is similar to recharging batteries. Different DRAM components require different refresh methods.

The number of DRAM component rows that must be refreshed. Three common refresh rates are 2K, 4K and 8K.

(Synchronous DRAM) - A DRAM technology that uses a clock to synchronize signal input and output on a memory chip. The clock is coordinated with the CPU clock so the timing of the memory chips and the timing of the CPU are in synch. Synchronous DRAM saves time in executing commands and transmitting data, thereby increasing the overall performance of the computer. SDRAM allows the CPU to access memory approximately 25 percent faster than EDO memory.

(Single In-line Memory Module) - A printed circuit board having memory devices and gold or tin/lead contacts. A SIMM plugs into a computer memory expansion socket. SIMMs offer two main advantages: ease of installation and minimal consumption of board surface. A vertically mounted SIMM requires only a fraction of the space required by a horizontally mounted DRAM. A SIMM may have as few as 30 or as many as 200 pins. On a SIMM, the metal leads on either side of the board are electrically tied together.

A motherboard component that holds a single SIMM.

(SRAM) - A memory chip that requires power to retain content. SRAM is faster than DRAM but more expensive and bulky. A typical use for SRAM is cache memory.

A data-holding device, such as a hard disk or CD-ROM.

(VL-Bus) - A 32-bit local bus that runs between the CPU and peripheral devices at speeds up to 40MHz.

Simulated memory. When RAM is full, the computer swaps data to the hard disk and back as needed. See Swapping.

A program usually disguised as something else, that is loaded onto your computer without your knowledge and runs against your wishes. It may either cause damage (by erasing or corrupting data) or irritate users (by sending out hundreds of pieces of email, or printing messages).

Acronym for W hat Y ou S ee I s W hat Y ou G et.

Pronounced wiz-ee-wig, is a program that allows the user to see what the end result will be of what is seen on the display.

Quiz 1. Help Desk Basics

1. This is the basic Internet program that lets you verify that a particular Internet address exists and can accept requests.
a. universal resource locator
b. NOC
c. ping
d. resource reservation protocol
e. bandwidth test

2. This is the smallest unit of data in a computer.
a. bit
b. exabyte
c. bogomip
d. byte
e. nit

3. This is the program your personal computer's microprocessor uses to get the computer system started after you turn it on.
a. boot
b. source code
c. initialization
d. BIOS
e. softswitch

4. This is the standard interactive and programming language for getting information from a database.
a. SQL
b. SSL
c. DCOM
d. PL/1
e. DASD

5. This is a collection of small programs, any of which can be called when needed by a larger program that is running in the computer.
a. digizine
b. legacy application
c. crosstalk
d. servlet
e. dynamic link library

6. This is the place in a computer where the operating system, application programs, and data in current use are kept so that they can be quickly reached by the computer's processor.
a. microprocessor
b. random access memory
c. access control list
d. management information base
e. system tray

7. This is a network point that acts as an entrance to another network.
a. network node manager
b. handshake
c. gateway
d. floating point unit
e. Fortezza

8. This is the measure of the range of frequencies a communication signal occupies.
a. radian
b. frequency modulation
c. frequency-hopping spread spectrum
d. dynamic range
e. bandwidth

9. This is the device, or in some cases, software in a computer, that determines the next network point to which a packet is forwarded toward its destination.
a. bit map
b. router
c. traceroute
d.device driver
e. transducer

10. This is a set of related programs, located at a network gateway server, that protects the resources of a private network from users from other networks.
a. secure socket shell
b. firewall
c. general protection fault
d. logic gate
e. private key

ANSWER KEY on page 64.

Дата добавления: 2014-12-27