tailieunhanh - Installing, Troubleshooting, and Repairing Wireless Networks phần 10

vô tuyến điện là tốt nhất cho những gì chúng tôi dự định để giao tiếp trên nó, và chúng ta muốn nó đi. Vì lý do này, ví dụ, điện thoại di động để giao tiếp chỉ có một hoặc hai dặm đến một trạm cơ sở gần đó có thể sử dụng điện năng thấp ở tần số rất cao. Và những tần số có thể | 354 Glossary keyboard. Under some applications programs these two keys may have different functions the numeric keypad Enter key may be used as an enter data key while the alphanumeric keyboard Enter key may be used as a carriage return. Environment An area of memory set up and used by the DOS software to store and retrieve a small amount of information that can be shared or referred to by many programs. Among other information that the DOS environment area can hold are the PATH current drive PROMPT COMSPEC and any SET variables. Escape sequence A set of commands or parameters sent between devices to control operations print text orientation or fonts screen colors and displays or begin file transfer operations between systems. Many printers accept escape sequences to change typeface or between portrait and landscape modes. Screen displays and the DOS prompt may be controlled by ANSI escape sequences through the device driver . These sequences are started with the transmission or issuance of the ASCII ESC character appearing similar to - or the ASCII control code Ctrl-Left Bracket A decimal 27 1B hex and follow with lettered or numbered command definitions. A common sequence is ESC-2-j possibly appearing as A 2J on your screen which is the Clear Screen ANSI escape sequence. Executable file A program file that may be invoked from the operating system. Dynamically linked libraries DLLs and overlay files also contain executable program information but their functions must be invoked from within another program. Execute The action that a computer takes when it is instructed to run a program. A running program is said to execute or be executing when it is being used. Expanded memory This is an additional area of memory created and managed by a device driver program using the Lotus-Intel-Microsoft Expanded Memory Specification known also as LIMS-EMS. There are three common forms of EMS that conforming to the LIMS-EMS standard for software-only access to this .