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Types of Transmission Modes and Networking Categories

Explore the three types of transmission modes: simplex, half-duplex, and full-duplex. Learn about local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs).

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Types of Transmission Modes and Networking Categories

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  1. Transmission ModeThe term transmission mode is used to define the direction of signal flow between two linked devices. There are three types of transmission modes:1- simplex2- half-duplex3- full-duplex SimplexIn simplex mode the communication is unidirectional as a one-way street. Only one of the two stations on a link can transmit the other can only receive.

  2. Half DuplexIn half duplex mode, each station can both transmit and receive but not at the same time. When one device is sending the other can only receive.The half duplex mode is like a one –lane road with two directional traffic. While cars are traveling one direction cars going the other way must wait.

  3. Full DuplexIn full-duplex mode (also called duplex), both stations can transmit and receive simultaneously. The full-duplex mode is like a two way street with traffic flowing in both directions at the same time.

  4. Categories Of Networking:Local area networkA local area network is usually privately owned and links the devices in a single office ,building ,or campus .Depending on the needs of an organization and the type of technology used , a LAN can be as simple as two PCs and a printer in some one’s home office or it can extend through out a company and include voice ,sound ,and video peripherals .Currently ,LAN size is limited to a few kilometers.LANs are designed to allow resources to be shared between personal computers or workstations

  5. Metropolitan Area NetworkMAN is designed to extend over an entire city. It may be a single network such as a cable television network, or it may be a means of connecting a number of LANs into a larger network so that recourses may be shared LAN-LAN as well as device-to-device .for example , a company can use a MAN to connect the LANs in all of its offices throughout a city .

  6. Wide Area NetworkWAN provides long –distance transmission of data, voice, image, and video information over large geographical areas that may comprise a country, a continent, or even the whole word.

  7. Internet works

  8. Digital Signal end office modem Telephone Exchange Copper Cable Analog Signal (voice band) Asynchronous RS-232C Digital Inside the PSTN Network end office modem COM port Example Network

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