2 Figure 2.1 Postal Service Sender Receiver Figure 2.2 Three Layer of Postal Service Figure 2.3: Open System Interconnection Figure 2.4: OSI Layer Post Office 1 Post
2
Figure 2.1 Postal Service
Sender Receiver
Figure 2.2 Three Layer of Postal Service
Figure 2.3: Open System Interconnection
Figure 2.4: OSI Layer
Post Office 1 Post Office 2
Figure 2.5: OSI Model Layers Communicate with Other Layers
Figure 2.6 Relationships among OSI layers
Figure 2.7 Interaction between among OSI layers
Figure 2.8: Headers and Data Can Be Encapsulated During Information Exchange
Figure 2.9 The OSI Layers and their functions
Figure 2.10: Physical layer
Coaxial Cable Hybrid Cable Wireless Card Network Card
Figure 2.11: Hardware devices
.
Figure 2.12: Binary Phase Shift Keying
Figure 2.13: Commonly used network topologies
Figure 2.14: Data link layer
Figure 2.15: Data Link Layer
Figure 2.16: Network layer
Figure 2.6: Transport layer
Figure 2.18: Session layer
Figure 2.19: Presentation layer
Figure 2.20: Application layer
Figure 2.21: Summary of layer
Figure 2.22: The architecture of the TCP/IP protocol suite
Figure 2.23: Repeater, bridge, and router
Figure 2.24: Addresses in TCP/IP