Question: QUESTION 4: (20 marks) a) TCP/IP is divided into four separate layers and each layer handles different aspects of communication problem. Describe each layers functionality

QUESTION 4: (20 marks) a) TCP/IP is divided into four separate layers and each layer handles different aspects of communication problem. Describe each layers functionality in the TCP/IP suite. b) There are several alternative online payment systems that can be used in an e- commerce industry. Explain TWO (2) types of alternative online payment system.

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