TCP/IP Model Summary

Question 1

Tell me what the Key function are, Focus, and Device focus is for a Physical Layer

Answer 1

Physical parts that communicate and energy over those parts (electicity, light, radio)
Focus is the Network- Device- Cables, radio

Question 2

Tell me what the Key function are, Focus, and Device focus is for a Data Link

Answer 2

Rules about when to use physical link; addressing specific to the physical links
Focus: Network-Device- LAN switch

Question 3

Tell me what the Key function are, Focus, and Device focus is for a Network (internet)

Answer 3

Logical addressing (addressing independent of the physical links) routing
Focus Network    Device is the router

Question 4

Tell me what the Key function are, Focus, and Device focus is for a Transport

Answer 4

Communications functions useful to apps, but likely useful to many apps
Focus: Host Device: Any endpoint device

Question 5

Tell me what the Key function are, Focus, and Device focus is for a Application

Answer 5

Communications functions specific to a particular app

Focus: Host Device: Any endpoint device