The osi model and TCP/IP Protocol suite Computer Science and Information Engineering Spring 2004 Chuan-Ming liu CS旧E.NTUT. TAWAN
CSIE, NTUT, TAIWAN 1 The OSI Model and TCP/IP Protocol Suite Computer Science and Information Engineering Spring 2004 Chuan-Ming Liu
CONTENTS · THE OSI MODEI LAYERS IN THE OSI MODEL TCPIP PROTOCOL SUITE ADDRESSING ·TCP/ IP VERSIONS CSIE NTUT TANAN
CSIE, NTUT, TAIWAN 2 CONTENTS • THE OSI MODEL • LAYERS IN THE OSI MODEL • TCP/IP PROTOCOL SUITE • ADDRESSING • TCP/IP VERSIONS
THE OSI MODEL CSIE NTUT TANAN
CSIE, NTUT, TAIWAN 3 THE OSI MODEL 2.1
Layering Divide a task into pieces and then solve each piece independently (or nearly so) Establishing a well-defined interface between layers makes porting easier Major advantages ◆ Code reuse ◆ Extensibility CSIE NTUT TANAN
CSIE, NTUT, TAIWAN 4 Layering • Divide a task into pieces and then solve each piece independently (or nearly so). • Establishing a well-defined interface between layers makes porting easier. • Major Advantages: Code Reuse Extensibility
Layering Example: Federal Express Letter in envelope, address on outside FedX guy adds addressing information barcode Local office drives to airport and delivers to hub Sent via airplane to nearest city. Delivered to right office Delivered to right person CSIE NTUT TANAN
CSIE, NTUT, TAIWAN 5 Layering Example: Federal Express • Letter in envelope, address on outside • FedX guy adds addressing information, barcode. • Local office drives to airport and delivers to hub. • Sent via airplane to nearest city. • Delivered to right office • Delivered to right person