Data Communications and Networking. Chapter 2 Protocol Architecture : TCP/IP model and OSI Model Reading: Book Chapter 2 Data and Computer Communications, 8th edition By William Stallings. Outline. Section 1: The need for a protocol architecture Section 2: TCP/IP protocol architecture
TCP/IP model and OSI Model
Book Chapter 2
Data and Computer Communications, 8th edition
By William Stallings
The Need for a Protocol Architecture
the accepted or established code of procedure or behavior in any group, organization, or situation
set of rules governing the exchange or transmission of data electronically between devices
can be replaced by other modules
Module WVertical Stack
How to communicate?
messages in Spanish
messages in Chinese
messages in English
Lower layer provides services to the next higher layer.
TCP/IP Protocol Architecture
IEEE 802.3 1000BASE-SX
Point-to-pointNetwork Access Layer
To: Mr. Jacky Chan
No. 123, XX Road,
Central Post Office (Beijing)
Central Post Office (New York)
The delivery of your package depends on the postal address.
Central Post Office (Hong Kong)
Local Post Office (Kowloon Tong)
Local Post Office (Tseung Kwan O)
LLC and MAC are sub-layers of Layer 2.
Routing table at router A:
The OSI Model
Seven layers have been defined in OSI architecture.