CHAPTER 5 - Network Models: 5.2 Layered Tasks 5.3 OSI Model 5.4 TCP/IP Protocol Suite 5.5 Addressing
CHAPTER 5 - Network Models: 5.2 Layered Tasks 5.3 OSI Model 5.4 TCP/IP Protocol Suite 5.5 Addressing
CHAPTER 5 - Network Models: 5.2 Layered Tasks 5.3 OSI Model 5.4 TCP/IP Protocol Suite 5.5 Addressing
5.1 Introduction
5.2 Layered Tasks
5.3 OSI Model
5.4 TCP/IP Protocol Suite
5.5 Addressing
Hardware Software
Layered Models
5.3.1 Introduction
• Established in 1947.
• The International Standards Organization (ISO) is a
multinational body dedicated to worldwide agreement
on international standards.
• An ISO standard that covers all aspects of network
communications is the Open Systems Interconnection
(OSI) model.
• It was first introduced in the late 1970s.
• Open System -
A set of protocols that allows any two different
systems to communicate regardless of their
underlying architecture.
• Purpose –
To show how to facilitate communication between
different systems without requiring changes to the logic
of the underlying hardware and software.
• OSI model is not a protocol.
Peer-to-Peer Processes
User Support
Layers
Network Support
Layers
5.3.4 Encapsulation
1. Physical Layer
3. Network Layer
4. Transport Layer
5. Session Layer
6. Presentation Layer
7. Application Layer
Summary of Layers
5.4.1 Introduction
Host-to-Network Application
Internet Transport
5.4.2 Layers
5.5.1 Introduction
Example1:
Example2:
Example:
753
Examples:
Defines the recipient of an E-mail
- forouzan@fhda.edu
Find a document on the Internet
- www.mhhe.com