计算机网络中的传输协议是_计算机网络中的传输方式

计算机网络中的传输协议是

传输方式 (Transmission Modes)

The mechanism of transferring data or information between two linked devices connected over a network is referred to as Transmission Modes.

在通过网络连接的两个链接的设备之间传输数据或信息的机制称为传输模式 。

The transmission mode is also called as the communication mode.
传输模式也称为通信模式。
It tells the direction of signal flow between the two linked devices.
它告诉两个链接的设备之间信号流的方向。
Buses and networks are designed to allow communication to occur between individual devices that are linked over a network.
总线和网络旨在允许通过网络链接的各个设备之间进行通信。

交易方式分类 (Categories of Transaction Modes)

There are three categories of transmission mode:

传输模式分为三类：

Simplex Mode
单工模式
Half-Duplex Mode
半双工模式
Full-Duplex Mode
全双工模式

1)单工模式 (1) Simplex Mode)

In this type of transmission mode, communication is unidirectional that is data can be sent only in one direction. This means you cannot send a message back to the sender just like a one-way street.
在这种类型的传输模式中，通信是单向的，即数据只能在一个方向上发送。这意味着您不能像单向街一样将消息发送回发件人。
From the two devices, only one can send or transmit on a link and the other can only receive the data.
从这两个设备中，只有一个可以在链接上发送或发送，而另一个只能接收数据。

Simplex Mode of Transmission

单工传输方式

Example:

例：

A simplex duplex transmission can be seen between a computer and a keyboard. A television broadcast, television and remote are also examples of simplex duplex transmission.
可以在计算机和键盘之间看到单工双工传输。电视广播，电视和遥控器也是单工双工传输的示例。
Another example of simplex transmission includes a loudspeaker system. An announcer sends his/her voice into a microphone and voice is sent through an amplifier and then to all the speakers.
单工传输的另一个示例包括扬声器系统。播音员将他/她的声音发送到麦克风，然后通过放大器将声音发送到所有扬声器。

Advantage of Simplex mode

单工模式的优势

In this mode, the station can utilize the entire capacity of the communication channel, so there can be transmitted more data at a time.

在这种模式下，站点可以利用通信信道的全部容量，因此可以一次传输更多的数据。

Disadvantage of Simplex mode

单工模式的缺点

Mainly communications require the two-way exchange of data but it is unidirectional, so it has no inter-communication between devices.

通信主要是需要双向数据交换，但它是单向的，因此设备之间没有相互通信。

2)半双工模式 (2) Half-Duplex Mode)

In a Half-duplex mode, each station can transmit and receive the data as well.
在半双工模式下，每个站也可以发送和接收数据。
The flow of messages can be in both directions, but not simultaneously.
消息流可以双向，但不能同时。
The entire capacity (bandwidth) of the communication channel is utilized in one direction at a time.
一次在一个方向上利用通信信道的全部容量(带宽)。
In half-duplex mode, the sender sends data and wait for its acknowledgment and if there is any error so that receiver can demand it to retransmit that data. By this error detection is possible.
在半双工模式下，发送方发送数据并等待其确认，如果有任何错误，则接收方可以要求其重新传输该数据。通过这种错误检测是可能的。

An example of half-duplex mode is Walkie-talkie. In Walkie-talkie, from one side a speaker speaks, and from the other side, someone listens. After a pause, the other speaks and first-person listens.

半双工模式的一个示例是对讲机 。在对讲机中，说话者从一侧讲，而另一侧则有人听。暂停后，对方讲话，第一人称聆听。

Half- Duplex Mode of Transmission

半双工传输模式

Example:

例：

This is like a one land road with two-directional traffic. While cars are traveling in one direction, cars going to another way must wait.

这就像一条双向交通的单陆路。当汽车沿一个方向行驶时，向另一种方向行驶的汽车必须等待。

Advantage of Half-duplex mode

半双工模式的优势

In half-duplex mode, the entire capacity of a channel is taken over by whichever of the two devices is transmitting at the same time.

在半双工模式下，通道的全部容量由两个设备中同时传输的一个接管。

Disadvantage of Half-Duplex mode

半双工模式的缺点

It causes the delay in sending the data at the correct time as when one device is sending the data, then another has to wait to send data.

当一台设备发送数据时，它会导致在正确的时间发送数据的延迟，然后另一台设备必须等待发送数据。

3)全双工模式 (3) Full Duplex Mode)

In Full duplex mode, the communication is bi-directional, i.e., the data flow in both the directions at the same time.
在全双工模式下，通信是双向的，即，数据同时在两个方向上流动。
From both the ends receipt and transmission of data is possible at the same time.
从两端可以同时接收和传输数据。
Full-duplex mode has two physically separate transmission paths, one is for traffic moving in one direction, and another path is for traffic moving in the opposite direction.
全双工模式具有两条物理上分离的传输路径，一条用于在一个方向上移动的流量，另一条用于在相反方向上移动的流量。
It is one of the fastest mode of communication between devices.
它是设备之间最快的通信模式之一。

Full- Duplex Mode of Transmission

全双工传输方式

Example:

例：

On a telephone line, two people are communicating with each other both can talk and listen to each other at the same time, this is the full-duplex transmission.

在电话线上，两个人正在互相通信，可以同时通话和收听，这是全双工传输。

Another example includes a two way street with traffic flowing in both the directions simultaneously.

另一个示例包括双向道路，交通沿两个方向同时流动。

Advantage of Full-duplex mode

全双工模式的优势

Both the stations can send and receive the data at the same time, so the capacity of link can be shared.

两个站点可以同时发送和接收数据，因此可以共享链接的容量。

Disadvantage of Full-duplex mode

全双工模式的缺点

The bandwidth of the communication channel is divided into two parts if there is no dedicated path exists between the devices.

如果设备之间不存在专用路径，则通信通道的带宽分为两部分。