Cisco Network Academy Chapter 12~14 Question 1: Which layer is responsible for data encryption? A. Layer 7 B. Layer 6 C. Layer 5 D. Layer 4 Question 2: What is it called when the session layer decides whether to use two-way simultaneous or two-way alternate communication? A. expectational acknowledgement B. dialogue separation C. resynchronization D. dialogue control Question 3: If one system us..