ECS Lesson 8 Computers for Communication

• I can,
  Explain how computers are used for communications.

• Recognize various forms of communication as data exchange.

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​Learning Target

Open Ended

Open Ended

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Computers are used for communication in many ways, and they rely on a set of rules called ​

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to make sure information is exchanged correctly. Data communication is the process of transferring information between ​

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, like sending an email or video chatting. It's like having a conversation, but instead of talking, computers use data to ​

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.

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Imagine sending a ​

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to a friend. You need to write the message (the ​

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), send it (the sender), and your friend needs to receive it (the ​

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). The message could be a text, a picture, or even a video. To make sure your friend understands the message, you both need to agree on a language (the ​

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).

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Think of the internet as a giant network of computers connected by wires and wireless ​

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. These computers use protocols like TCP and IP to ​

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with each other. TCP makes sure the message is divided into small packets and sent in the right order, while IP makes sure each packet reaches the correct ​

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.

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There are different ​

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of networks, like local area networks (LANs) that connect computers in a small area, and wide area networks (WANs) that connect computers across large ​

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. These networks use different protocols to communicate, but they all rely on the same basic ​

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.

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Communication protocols are like a set of ​

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that define how data is exchanged between devices. They make sure that data is ​

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correctly, sent at the right speed, and that any errors are detected and corrected. Without ​

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, computers wouldn't be able to communicate with each other effectively.

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The Open Systems Interconnection (OSI) model is a framework that helps ​

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​ communication between computers. It divides the communication process into seven layers, each with its own set of ​

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. These layers work together to ensure that data is transmitted smoothly and ​

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.

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is a process or act in which we can send or receive data. Understanding the fundamental structures of

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is crucial for anyone working with computer systems and communication. For data communication two models are available, the

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(Open Systems Interconnection) Model, and the

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(Transmission Control Protocol/Internet Protocol) Model.

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Similarities Between OSI Model and TCP/IP Model OSI and TCP/IP both are logical ​

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. One of the main similarities between the OSI and TCP/IP models is that they both describe how information is transmitted between two devices across a ​

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. Both models define a set of layers. Each layer performs a specific set of functions to enable the transmission of ​

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.

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Differences Between OSI Model and TCP/IP Model The OSI (Open Systems Interconnection) Model and the TCP/IP (Transmission Control Protocol/Internet Protocol) Model are two frameworks used to understand how ​

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through networks. While they both help in organizing network communication, they have distinct structures and purposes. Understanding these ​

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is essential for anyone learning about or working with computer networks.

Multiple Choice

What does TCP (Transmission Control Protocol) do?

• TCP is used for sending video streams only.
• TCP operates without establishing a connection.
• TCP ensures reliable, ordered, and error-checked delivery of data between applications.

Multiple Choice

What does IP (Internet Protocol) do?

• IP facilitates communication over the internet by routing data packets to their destination.
• IP is responsible for managing user accounts on the internet.

Multiple Choice

Why does TCP and IP work together?

• TCP ensures reliable communication, while IP manages packet routing.
• TCP and IP are used for wireless communication only.

Multiple Choice

What is the main purpose of communication protocols in computer communication?

• To ensure that data is sent at the fastest possible speed.

• To allow computers to communicate with each other in different languages.

• To define the rules for how data is exchanged between devices.

• To create a secure connection between two computers.

Multiple Choice

What are two examples of protocols used by computers on the internet?

• 
  TCP and IP

• LAN and WAN

• OSI and TCP

• IP and OSI

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