計(jì)算機(jī)網(wǎng)絡(luò)中的傳輸協(xié)議是

傳輸方式 (Transmission Modes)

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

在通過(guò)網(wǎng)絡(luò)連接的兩個(gè)鏈接的設(shè)備之間傳輸數(shù)據(jù)或信息的機(jī)制稱(chēng)為傳輸模式 。

• The transmission mode is also called as the communication mode.

  傳輸模式也稱(chēng)為通信模式。

• It tells the direction of signal flow between the two linked devices.

  它告訴兩個(gè)鏈接的設(shè)備之間信號(hào)流的方向。

• Buses and networks are designed to allow communication to occur between individual devices that are linked over a network.

  總線(xiàn)和網(wǎng)絡(luò)旨在允許通過(guò)網(wǎng)絡(luò)鏈接的各個(gè)設(shè)備之間進(jìn)行通信。

交易方式分類(lèi) (Categories of Transaction Modes)

There are three categories of transmission mode:

傳輸模式分為三類(lèi)：

Simplex Mode

單工模式

Half-Duplex Mode

半雙工模式

Full-Duplex Mode

全雙工模式

1)單工模式 (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.

  在這種類(lèi)型的傳輸模式中，通信是單向的，即數(shù)據(jù)只能在一個(gè)方向上發(fā)送。 這意味著您不能像單向街一樣將消息發(fā)送回發(fā)件人。

• From the two devices, only one can send or transmit on a link and the other can only receive the data.

  從這兩個(gè)設(shè)備中，只有一個(gè)可以在鏈接上發(fā)送或發(fā)送，而另一個(gè)只能接收數(shù)據(jù)。

Simplex Mode of Transmission

單工傳輸方式

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.

  可以在計(jì)算機(jī)和鍵盤(pán)之間看到單工雙工傳輸。 電視廣播，電視和遙控器也是單工雙工傳輸?shù)氖纠?

• 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.

  單工傳輸?shù)牧硪粋€(gè)示例包括揚(yáng)聲器系統(tǒng)。 播音員將他/她的聲音發(fā)送到麥克風(fēng)，然后通過(guò)放大器將聲音發(fā)送到所有揚(yáng)聲器。

Advantage of Simplex mode

單工模式的優(yōu)勢(shì)

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

在這種模式下，站點(diǎn)可以利用通信信道的全部容量，因此可以一次傳輸更多的數(shù)據(jù)。

Disadvantage of Simplex mode

單工模式的缺點(diǎn)

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

通信主要是需要雙向數(shù)據(jù)交換，但它是單向的，因此設(shè)備之間沒(méi)有相互通信。

2)半雙工模式 (2) Half-Duplex Mode)

• In a Half-duplex mode, each station can transmit and receive the data as well.

  在半雙工模式下，每個(gè)站也可以發(fā)送和接收數(shù)據(jù)。

• The flow of messages can be in both directions, but not simultaneously.

  消息流可以雙向，但不能同時(shí)。

• The entire capacity (bandwidth) of the communication channel is utilized in one direction at a time.

  一次在一個(gè)方向上利用通信信道的全部容量(帶寬)。

• 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.

  在半雙工模式下，發(fā)送方發(fā)送數(shù)據(jù)并等待其確認(rèn)，如果有任何錯(cuò)誤，則接收方可以要求其重新傳輸該數(shù)據(jù)。 通過(guò)這種錯(cuò)誤檢測(cè)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.

半雙工模式的一個(gè)示例是對(duì)講機(jī) 。 在對(duì)講機(jī)中，說(shuō)話(huà)者從一側(cè)講，而另一側(cè)則有人聽(tīng)。 暫停后，對(duì)方講話(huà)，第一人稱(chēng)聆聽(tīng)。

Half- Duplex Mode of Transmission

半雙工傳輸模式

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.

這就像一條雙向交通的單陸路。 當(dāng)汽車(chē)沿一個(gè)方向行駛時(shí)，向另一種方向行駛的汽車(chē)必須等待。

Advantage of Half-duplex mode

半雙工模式的優(yōu)勢(shì)

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.

在半雙工模式下，通道的全部容量由兩個(gè)設(shè)備中同時(shí)傳輸?shù)囊粋€(gè)接管。

Disadvantage of Half-Duplex mode

半雙工模式的缺點(diǎn)

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.

當(dāng)一臺(tái)設(shè)備發(fā)送數(shù)據(jù)時(shí)，它會(huì)導(dǎo)致在正確的時(shí)間發(fā)送數(shù)據(jù)的延遲，然后另一臺(tái)設(shè)備必須等待發(fā)送數(shù)據(jù)。

3)全雙工模式 (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.

  在全雙工模式下，通信是雙向的，即，數(shù)據(jù)同時(shí)在兩個(gè)方向上流動(dòng)。

• From both the ends receipt and transmission of data is possible at the same time.

  從兩端可以同時(shí)接收和傳輸數(shù)據(jù)。

• 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.

  全雙工模式具有兩條物理上分離的傳輸路徑，一條用于在一個(gè)方向上移動(dòng)的流量，另一條用于在相反方向上移動(dòng)的流量。

• It is one of the fastest mode of communication between devices.

  它是設(shè)備之間最快的通信模式之一。

Full- Duplex Mode of Transmission

全雙工傳輸方式

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.

在電話(huà)線(xiàn)上，兩個(gè)人正在互相通信，可以同時(shí)通話(huà)和收聽(tīng)，這是全雙工傳輸。

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

另一個(gè)示例包括雙向道路，交通沿兩個(gè)方向同時(shí)流動(dòng)。

Advantage of Full-duplex mode

全雙工模式的優(yōu)勢(shì)

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

兩個(gè)站點(diǎn)可以同時(shí)發(fā)送和接收數(shù)據(jù)，因此可以共享鏈接的容量。

Disadvantage of Full-duplex mode

全雙工模式的缺點(diǎn)

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

如果設(shè)備之間不存在專(zhuān)用路徑，則通信通道的帶寬分為兩部分。

翻譯自: https://www.includehelp.com/computer-networks/transmission-modes.aspx

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