1. The University of Adelaide, School of Computer Science
19 September 2018
Computer Networks, 5th Edition
Chapter 1
Foundation
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Chapter 2 — Instructions: Language of the Computer

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FIGURE 1.1 A multimedia application including videoconferencing.
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FIGURE 1.2 Direct links: (a) point-to-point; (b) multiple-access.
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FIGURE 1.3 Switched network.
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FIGURE 1.4 A Interconnection of networks.
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FIGURE 1.5 Multiplexing multiple logical flows over a single physical link.
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FIGURE 1.6 A switch multiplexing packets from multiple sources onto one shared link.
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FIGURE 1.7 Processes communicating over an abstract channel.
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FIGURE 1.8 Example of a layered network system.
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FIGURE 1.9 Layered system with alternative abstractions available at a given layer.
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FIGURE 1.10 Service interfaces and peer interfaces.
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FIGURE 1.11 Example of a protocol graph.
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FIGURE 1.12 High-level messages are encapsulated inside of low-level messages.
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FIGURE 1.13 The OSI 7-layer model.
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FIGURE 1.14 Internet protocol graph.
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FIGURE 1.15 Alternative view of the Internet architecture. The subnetwork layer was historically referred to as the network layer and is now often referred to as the layer or simply layer 2.
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FIGURE 1.16 Bits transmitted at a particular bandwidth can be regarded as having some width: (a) bits transmitted at 1 Mbps (each bit is 1 µs wide); (b) bits transmitted at 2 Mbps (each bit is 0.5 µs wide).
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FIGURE 1.17 Perceived latency (response time) versus round-trip time for various object sizes and link speeds.
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FIGURE 1.18 Network as a pipe.
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FIGURE 1.19 Relationship between bandwidth and latency. A 1-MB file would fill the 1-Mbps link 80 times but only fill the 1-Gbps link 1/12 of one time.
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FIGURE 1.20 Network-induced jitter.
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FIGURE 1.21 Diagram for Exercise 20.
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