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Computing Revision

• Containing:
• Protocols and Layers (OSI model)
• IP Addressing

Protocols and Layers (OSI Model)

• The OSI Model is short for Operating Systems Interconnection Model.
• It's a model that describes the communication functions of a computer system without underlying technology.
• Application Layer
• The Network applications people use operate/work on the Application Layer.
• It selects the correct protocol to use, depending on which application it is and what you wish to do with it.
• it's the top layer for the TCP/IP Protocol.
• (Use SMTP and POP fort emails)