This document discusses basic networking concepts including line configurations, topologies, transmission modes, network categories, and internetworks. It provides diagrams and descriptions of point-to-point, multipoint, mesh, star, tree, bus, and ring topologies. Additionally, it examines simplex, half-duplex, and full-duplex transmission modes as well as LAN, MAN, WAN network categories. Finally, it introduces the OSI model and its layers and functions.

1. Basic Concepts
• Line Configuration
• Topology
• Transmission Mode
• Categories of Networks
• Internetworks

2. Figure 2-1

3. Figure 2-2
Point-to-Point Line Configuration

4. Figure 2-2-continued
Point-to-Point Line Configuration

5. Figure 2-2-continued
Point-to-Point Line Configuration

6. Figure 2-3
Multipoint Line Configuration

7. Figure 2-4

8. Figure 2-5
Mesh Topology

9. Figure 2-6
Star Topology

10. Figure 2-7
Tree Topology

11. Figure 2-8
Bus Topology

12. Figure 2-9
Ring Topology

13. Figure 2-10
Hybrid Topology

14. Figure 2-11

15. Figure 2-12
Simplex

16. Figure 2-13
Half-Duplex

17. Figure 2-14
Full-Duplex

18. Figure 2-15

19. Figure 2-16
Local Area Network

20. Figure 2-16-continued
Local Area Network

21. Figure 2-17
Metropolitan Area Network

22. Figure 2-18
Wide Area Network

23. Figure 2-19
Internetwork
(Internet)

24. OSI
Model
• The model
• Functions of the layers

25. Figure 3-1
OSI Model

26. Figure 3-2
OSI Layers

27. Figure 3-3
An Exchange Using the OSI Model

28. Figure 3-4
Physical Layer

29. Figure 3-5
Data Link Layer

30. Figure 3-6
Data Link Layer Example

31. Figure 3-7
Network Layer