3 Written questions
2 Multiple choice questions
- 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.
- 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
Layer 3: Network Layer → Manages user sessions and dialogues. Controls the establishment and termination of logic links between users. Reports upper layer errors.
Layer 1: Physical Layer → Defines physical means of sending data over network devices. Interfaces between network medium and devices. Defines optical, electrical and mechanical characteristics.