CCENT Exam Cram (Exam 640-822)

Chapter 2. Network Models

Terms You’ll Need to Understand

• Access
• Distribution
• Core layer
• Application layer
• Presentation layer
• Session layer
• Transport layer
• Network layer
• Data link layer
• Physical layer
• Connection-oriented transmission
• Connectionless transmission

Concepts and Techniques You’ll Need to Master

• Associating network processes to OSI model layers
• Associating applications and protocols to their OSI layer
• Understanding the encapsulation and decapsulation process
• Understanding interhost communication
• Identifying protocols and their port numbers

Introduction

Any complex operation requires a certain degree of structure in order to be understood. When dealing with millions of individuals all designing and building programs, protocols, and ...