TCP/IP Layer Description Application

• Consists of user-accessed application programs and network services
• Defines the application specific format

Transport

• Provides end-to-end message transfer capabilities (reliable and unreliable)
• Manages communication between cooperating applications

Internet

• Manages data addressing and delivery between networks
• Fragments data for the Network Interface layer

Network Interface

• Manages the delivery of data across the physical network
• Provides error detection and packet framing

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