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3 Written questions

2 Multiple choice questions

  1. Defines interface-to-user processes for communication and data transfer in network. Provides standardized services such as virtual terminal, file and job transfer and operations.
  2. Masks the differences of data formats between dissimilar systems. Specifies architecture-independent data transfer format. Encodes and decodes data; encrypts and decrypts data; compresses and decompresses data.

2 True/False questions

  1. Layer 3: Network LayerManages user sessions and dialogues. Controls the establishment and termination of logic links between users. Reports upper layer errors.


  2. Layer 1: Physical LayerDefines physical means of sending data over network devices. Interfaces between network medium and devices. Defines optical, electrical and mechanical characteristics.


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