Still walking , on my new book Networking Interview Questions

On my new book Networking Interview questions...... And the race is on...

Can you define protocol?
Can you explain the concept of Interlayer and multilayer approach?
What is a protocol stack or protocol suite?
Can you explain the concept of OSI layer?
Can you explain the different layers in OSI model?
Can you explain Application layer in OSI model?
Can you explain Presentation layer in OSI model?
Is it compulsory that compression, encryption and translation functions will be used during communication?
Can you explain Session layer in OSI model?
What’s the concept of Simplex, Half Duplex and Full Duplex dialogs?
What are the different types of dialogs in Session layer?
Can you explain Transport layer in OSI model?
Can you explain the concept of Congestion?
Can you explain Application layer in OSI model?
Can you explain the concept of DPU, Segments, Datagram, Frame and packet?Can you explain the concept of Repeaters, Hubs, Bridges, Switches, Routers, Layer 3 switches and CSU/DSUs?why does collision occur in HUBS and repeaters?
Can you explain the concept of Collision domain?
Can you explain the difference between Base band and Broad Band?