Chapter 1 Data communication

Data communication Subject : Technology Unit : 1 Data communication Class : Matthayom Suksa 5 (EISP)Teacher : Mr. Thanaded LeelerdthanakulBenchamarachuthit Chanthaburi School Learning Objectives. After completing this chapter, students will be able to: 1. Understand what data communication is. 2. Know the components of data communication. 3. Identify and describe each components of data communication.

Key WordsData communication การสอ่ื สารขอมลูMessage ขอมลู /ขาวสารSender/Transmitter ผสู ง/อุปกรณส งReceiver ผูร บั /อปุ กรณร บัMedium/Transmission medium สอื่ กลางในการสง ขอ มูลProtocol โพรโทคอล What is data communication?

What is data communication? Data communication is the exchange ofdata/message between two devices over somemedium.The medium may be cables, fiber optics,satellite, microwaves , radio waves and so on. How many components are there in data communication?

How many components are there in data communication?There are 5 components in data communication.They are:- 1. 2. 3. 4. 5.Message Sender Receiver Medium Protocol How many components are there in data communication?There are 5 components in data communication.They are:- 1. It is the information/data to be communicated.Message It can consist of texts, numbers, pictures, sounds or videos.

How many components are there in data communication?There are 5 components in data communication.They are:- 2. It is the computer or device which sends the dataSender (we can called sender or transmitter). It can be a computer, telephone or a fax machine. How many components are there in data communication?There are 5 components in data communication.They are:- 3. It is the computer or device which receives the data.Receiver It can be a computer, printer or a fax machine.

How many components are there in data communication?There are 5 components in data communication.They are:- 4. It is the physical path by which data is sent from senderMedium to receiver (we can called transmission medium). If the sender and receiver are located at different locations, they may be connected by telephone lines, fiber-optics or satellite.How many components are there in data communication?There are 5 components in data communication.They are:- 5. It is a set of rules that governs the data communications.Protocol It represents an agreement between the communicating devices. Without a protocol, two devices may be connected but not communicating.

Questions1. Match the components of data communication withthe word. 1. 2. 3. 4. 5. Message Sender Receiver Medium Protocol Word No. Word No. Word No.satellite 4 computer 2,3 fax 2,3 http data 5 fiber-optic 4 microwave 4printer video 1 bluetooth 5 telephone 2,3camera 3 information 1 wi-fi 5 2 radio wave 4 picture 1 Questions2. There are 5 components of data communication. A. Describe each components of data communication. B. Give 3 examples of Message. C. Give 3 examples of Sender. D. Give 3 examples of Receiver. E. Give 3 examples of Medium. F. Give 3 examples of Protocol.