TCP/IP Stack

• Defines four layer
• Uses different names for layer 1 through 3
• Combines layer 5 through 7 into single application layer.

 

Peer - to - Peer Communiction

Data Encapsulation and De - Encapsulation

Data Encapsulation

Data De-Encapsulation

The OSI MOdel

Physical Layer

Data Link Layer

Netwok Layer

Transport Layer

Session Layer

Presentation Layer

Application Layer

Network Communication Model

Why a layered network model?

• Reduces complexity
• Facilitates modular engineering
• Ensures interoperability technology
• Simplifies teaching and learning

Networking Topology

Physical Topology

• Pertains to the physical layout of devices in a network.

Logical Topology

• Pertains to how the data flows in a network. 

 

What Is a Network?

Common Physical Components of a Network

 

Purpose of Networking 

•  Connectivity between 2 or more host/devices.
•  Sharing of resources (printers/storage)