术语表

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802.3

通常称为以太网. 它是一种以10Mbps运行的局域网协议.

802.5

通常称为令牌环. 以4或16Mbps的速度运行.

A

ANSI

(美国国家标准协会). 你自愿的.S. 由行业协会组织制定标准.

ANSI X3T9

通常称为FDDI. 一种以100Mbps速度运行的局域网协议.

异步

Having a variable time interval between successive data or information in the form of characters, 操作, 事件. Transmission in which the data or information is individually synchronized or timed usually by start and stop bits (S/S).

自动取款机

异步传输模式的缩写, 一种基于定长交换的高性能组网技术, 53个字节细胞. 自动取款机交换支持语音交换, video, and data; also supports isochronous communication.

衰减

描述两点之间功率损失的一般术语, 以特定波长(nm)每公里的分贝(dB/km)测量.

B

骨干网

A main or high speed transmission facility or medium usually designed to connect lower speed channels or clusters of terminals. 可以描述公共载波主传输路径吗.

带宽

A range of frequencies available for signaling; the differences between the highest and lowest frequencies of a band are expressed in (Hz).

BPV

双极违逆的缩写.

A device used to connect two separate 局域网s or used to divide a large 局域网 into smaller 局域网s. Each 局域网 acts as its own 局域网, but uses a bridge device to communicate from one 局域网 to another.

B-ISDN(宽带ISDN)

CCITT和ANSI委员会提供的网络标准. 它支持语音、数据和视频在同一网络.

公共汽车

路径或通道, 通常电, 与一个或多个指挥家, 所有设备都能同时接收所有传输.

C

CCITT

咨询委员会,国际电话和电报的缩写. An international standards body responsible for setting international communications standards that allow interoperability among telephony and data communications equipment.

CD(论证)

载波检测(Detect Carrier Detect)的缩写.

CDDI

采用非屏蔽或屏蔽双绞线传输FDDI信号.

有限公司(总公司)

The local telephone company switch that terminates subscribers’ lines for switching and connecting to the public network.

带冲突检测的载波侦听多路访问

以太网访问协议.

反向旋转环

又名. Self-Healing Ring; has two physical transmission lines or rings with transmitting and receiving signals in each ring traveling in opposite directions. 如果线路或环上的设备故障, the ring re-anneals by bypassing the device and or line and forms with the other ring to form a new single ring.

相声

The unwanted transfer of energy from the disturbing circuit to another called the disturbed circuit. 通常来自相邻的模拟信道.

基督教社会联盟

频道服务单位的缩写, a device furnished as an integral part of a digital access line where a user wishes to supply the bipolar signals. It provides the network with protection against user side electrical anomalies such as surges, 并为用户提供网络时钟.

CTS

Clear To Send的缩写.

D

DCE

数据通信设备的缩写,又名. 数据电路终接设备.

DCR

数据通信就绪的缩写.

分散

在多模光纤传输中发生的光脉冲的传播. 分散 limits the potential transmission distance because the spread out light pulses reach the destination at different times making the signal unreadable.

DS1

数字信号,1级是用于T1运营商的北美数据速率. 它在1处起作用.544Mbps,支持24条电话线.

DS2

数字信号,2级是用于T2载波的北美数据速率. 它在6处运行.312 Mbps,支持4条T1线路或96个电话

DS3

数字信号,3级是用于T3运营商的北美数据速率. 它运行在44.736mbps,支持28条T1线路.

DSU

数据服务单位的缩写, a DCE used with digital communications circuits to provide digital data services interface. 位于用户所在地, DSU与数据终端设备直接相连, 并提供循环均衡, 远程和本地测试功能, 以及提供标准环境影响评价/TIA或CCITT接口所需的逻辑和时间安排. Converts signals between those used at the 数据终端设备's serial interface and bipolar signals used on the digital network. 网络终端单元(NTU).

数据终端设备

数据终止或数据终端设备的首字母缩写.

DTR

数据终端就绪的缩写.

E

E1

欧洲标准的高速,点对点传输操作在2.048mbps和定义64 Kbps子信道.

环境影响评价

电子工业协会的缩写. 环境影响评价, 一个标准的身体, has a set of standards which includes data communications and interface standards among others.

EMI

电磁干扰的缩写.

以太网

Product name for one of the first popular 局域网 technologies, later standardized as IEEE 802.3.

F

聚全氟乙丙烯

代表前端处理器. It is an IBM communication controller that routes traffic to and from cluster controllers.

光纤电缆

Thin filaments of glass or other transparent material sheathed in an insulator through which a light beam may be transmitted for long distances by means of multiple internal reflections. 一种用于传输数字信息的波导.

FDDI

光纤分布式数据接口的缩写, 是一种共享媒介, 环形拓扑局域网,运行在100兆比特秒. 它是ANSI标准X3T9.5、采用光缆作为介质.

流控制

一种接收机控制来自发射机的信息流的方法. 它消除了接收端的数据溢出.

FPGA

现场可编程门阵列的缩写.

全双工

一种两端可以同时发送和接收的通信方法.

H

半双工

一种通信方法,其中一端发送,另一端接收, 然后反转过程.

中心

A device for local area networks (局域网s) that is used to interconnect multiple devices over an internal bus.

J

抖动

又名. phase jitter, caused by power line harmonics and perceived in the form of minor phase changes.

L

局域网

A local area network is a group of PCs connected over a common medium within a building.

M

MAC

(介质访问控制)局域网或城域网中每个设备的指定硬件地址. 这个地址被它的制造商烧录到网络接口卡(NIC)中.

男人。

A metropolitan area network is a group of PCs connected over a common medium within a campus environment or the same city.

多点行

又名. 多点行, 支持多个数据终端设备连接的数据链路, usually with one 数据终端设备 controlling the link by polling the other 数据终端设备s for input and addressing output to the other 数据终端设备s. 使用分频或统计MUX, 多点线路可以支持多个独立的点对点信道.

多模光纤

一种支持光传播的一种以上传播模式的光纤.

多路复用器

又名. 或多路复用器或多路复用器. 一种同时使用多个通信信道的设备, 传输和接收信息并控制通信线路, 可能是一个微处理器.

N

NA

数值孔径的缩写.

节点

一种通过网络连接的设备,如服务器或PC机.

O

OC1

1级光载波信号是指51级SONET数据传输.840 mbps.

OC3

光载波的缩写, 用于光纤电话或数据通信电路的一种传输速率标准. OC3以155 Mbps的速度运行,是SONET层次结构的一部分.

OC12

12级光载波信号是指在622点的SONET数据传输.080 mbps.

订单线

用于两个地点之间通信的语音信道.

OSI

(Open Data Interconnection Reference Model) This is the International Standards Organization (ISO) model of how data communications systems can be interconnected. 通信分为七个功能层. 每一层都建立在其底层提供的服务之上.

P

一组数据, 通常由数据和地址头组成,在通过网络发送之前.

交换机

Private Branch Exchange的缩写, 是电话公司的大型中央交换所的小型私人版本吗.

脉码调制

脉冲编码调制的缩写词,一种将模拟信号转换为数字形式的方法.

点的存在(流行)

The physical access location within a specific location of the long distance or common carrier.

轮询

用于终端与控制器通信的方法. The controller systematically asks for each terminal if it needs to transmit to the controller.

协议

数据通信的一套规则. 所有在一起通信的设备必须遵守相同的规则.

R

路径或通道; 通常电, where devices along the path receive transmissions sequentially 从一个装置到另一个装置.

路由器

类似于网桥,但提供更复杂和灵活的网络支持. 它通常也支持广域网.

RS-232

An interface used between 数据终端设备 and DCE employing serial binary data interchange, defined by 环境影响评价, aka. eia - 232. 类似标准V.24的CCITT.

RS-422

标准由环境影响评价定义,又名. eia - 422. Deals with the electrical characteristics of balanced voltage digital interface circuits. 类似标准V.11的CCITT.

RS-423

标准由环境影响评价定义,又名. 423年环境影响评价. 研究了不平衡电压数字接口电路的电特性. 类似标准V.10 CCITT.

RS-449

标准由环境影响评价定义,又名. eia - 449. Deals with general-purpose 37- and 9-position interface for data terminal equipment and data circuit-terminating equipment employing serial binary data interchange.

RS-485

标准由环境影响评价定义,又名. eia - 485. Standard for electrical characteristics of generators and receivers for use in balanced multipoint systems.

即时战略游戏

请求发送的首字母缩写.

S

SCADA

监视控制和数据采集的缩写.

简单网络管理协议

A standard management protocol used to provide a common means of managing network devices.

单模光纤

An optical fiber that supports only one mode of light propagation above the cutoff wavelength.

同步传输

连续的数据或信息之间的时间间隔为常数的.

SONET

Acronym for Synchronous Optical NETwork, is a hierarchical standard for a high speed (45 Mbps to 2.4 Gbps)传输网络.

明星

Network in which all terminals are connected through a single point or node, such as a star coupler.

T

T1

电话或数据通信电路的传输速率标准. T1作用于1.544 Mbps的速度. 通常这个电路被细分为许多64 Kb的通道.

TCP / IP

传输控制协议/因特网协议的缩写.

时分多路复用

A type of multiplexer that allocates a defined amount of backbone bandwidth for each connected device.

时间段

为每个端口分配的骨干网带宽单位.

令牌环

A 局域网 topology where a control packet or token is passed from station to station in sequential order. 希望访问的站点必须在传输数据之前等待令牌, 在令牌环中,下一个逻辑站也是下一个物理站.

V

虚拟路径

两个设备或线段之间的一种软件控制的点对点连接.

W

广域网(WAN)

一种计算机网络,在城市或大都市地区以外的距离上相互连接.

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