Basic Concepts

• Line Configuration• Topology• Transmission Mode• Categories of Networks• Internetworks

Figure 2-1

Figure 2-2

Point-to-Point Line Configuration

Figure 2-2-continued

Point-to-Point Line Configuration

Figure 2-2-continued

Point-to-Point Line Configuration

Figure 2-3

Multipoint Line Configuration

Figure 2-4

Figure 2-5

Mesh Topology

Figure 2-6

Star Topology

Figure 2-7

Tree Topology

Figure 2-8

Bus Topology

Figure 2-9

Ring Topology

Figure 2-10

Hybrid Topology

Figure 2-11

Figure 2-12

Simplex

Figure 2-13

Half-Duplex

Figure 2-14

Full-Duplex

Figure 2-15

Figure 2-16Local Area Network

Figure 2-16-continuedLocal Area Network

Figure 2-17Metropolitan Area Network

Figure 2-18 Wide Area Network

Figure 2-19Internetwork

(Internet)

OSI Model

• The model• Functions of the layers

Figure 3-1

OSI Model

Figure 3-2 OSI Layers

Figure 3-3 An Exchange Using the OSI Model

Figure 3-4

Physical Layer

Figure 3-5

Data Link Layer

Figure 3-6

Data Link Layer Example

Figure 3-7

Network Layer