GOALS OF NETWORKING

 

PROTOCOLS

 

LAYERED ARCHITECTURE

 

THE OSI REFERENCE MODEL

 

Layer 1 - Physical Layer

Layer 2 - Data Link Layer

Layer 3 - Network Layer

Layer 4 - Transport Layer

Layer 5 - Session Layer

Layer 6 - Presentation Layer

Layer 7 - Application Layer

 
MODES OF SERVICE

 
CLIENTS AND SERVERS

 
SERVICES

 
SERVERS

CLIENTS

 
ADDRESSES

 
Some definitions:
 

Out-of-Band Data (or expedited data)