专业英语课后词组
串行接口serial interface 显示终端CRT terminal
发送器与接收器transmitter and receiver 数据传输 data transmission 数据流data stream 闲置状态the idle state 传号电平mark level 空号电平space level 起始位 start bit 停止位stop bit T 秒的持续时间duration of T seconds 奇偶校验位parity bit错误标志error flag 传输错误 transmission error 下降沿falling edge 符号间的空格intersymbol space 接收机的定时receiver timing 本地时钟local clock 磁带magnetic tape 控制比特control bit 逻辑1 电平logical 1 level 二进制数据binary data 明显的缺点obvious disadvantage
1 . asynchronous serial data transmission
异步串行数据传输
2 . the most popular serial interface
最为流行的串行接口
3 . the transmitted data
所传送的数据
4 . the clocks at the transmitter and receiver
发送器和接收器的时钟
5 . the era of teleprinter
电传机的时代
6 . the dots and dashes of a character
一个字符的点和划
7 . three times the duration of intersymbol space
符号间空格持续时间的三倍
8 . the group of bits called characters
被称为字符的比特组
9 . the invariable units comprising 7 or 8 bits of information
由7 或8 个比特的信息组成的固定单元
10 . a clock generated locally by the receiver
由接收机本地产生的时钟
11 . the received parity bit following the character
在字符后所收到的奇偶校验
12 . the falling edge of the start bit
起始位的下降沿
13 . the character-oriented nature of the data link
数据链路面向字符的特性
联网技术 networking technology 国际标准化组织 the International Organization for Standardization
参考模型 reference model 数据分组data packets
应用程序application program 网络媒体network media
分层 layering 硬件和软件 hardware and software
表示层the presentation layer 传输层the transport layer 数据链路层 network services 网络服务network services
文件接入 file-access 数据格式 the data format 主机host 协议 protocol 连接connectivity 逻辑选址logical addressing
1 . networking technology
联网技术
2 . proprietary networking system
专用网络系统