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Consider A and B are neighbors, A knows only Spanish , B knows only English, both have some ideas, they want to share with each others, what they would do?

Simplex method is the Sign Method

1 layer Communication

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OSI Layer Protocol Layer Summary Of Layers TCP/IP and OSI Model Addresses MAC Address Port Address:  Networking Devices Connecting Devices Gateways

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A has changed his place. Still wants to communicate with each other?

They brought two machines. A machine will convert Spanish to Secret Code and B machine will convert Secret Code to English.

3 layer Communication (A)◦ Write a letter in Spanish ◦ Translator◦ Drops the letter in the post office box.

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Delivery of data between two systems on a network Framing Physical Addressing Flow Control Error Control Access Control

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