OSI and TCP IP Model Layers
Cisco CCNA 200-301 PBQ
Match OSI and TCP/IP model layer names to their core functions, services, and associated protocols to reinforce an understanding of each layer’s responsibilities.
Combines OSI Physical and Data Link functions
Establishes and maintains dialogs between hosts
Transmission of raw bits over a medium
Provides protocols for user-facing applications
Frames data and implements MAC addressing
Implements high-level protocols like HTTP and SMTP
Uses logical addresses (IP) for routing
Handles IP routing across networks
End-to-end communication with TCP or UDP
Performs data translation and encryption
Ensures reliable or best-effort delivery
Network Layer
Session Layer
Network Access Layer (TCP/IP)
Application Layer
Transport Layer
Transport Layer (TCP/IP)
Internet Layer (TCP/IP)
Application Layer (TCP/IP)
Physical Layer
Presentation Layer
Data Link Layer