Computer Networks: An Open Source Approach (Connect, Learn, Succeed)

Computer Networks: An Open Source Approach (Connect, Learn, Succeed)

Ying-Dar Lin

Language: English

Pages: 768

ISBN: 0073376248

Format: PDF / Kindle (mobi) / ePub

Ying-Dar Lin, Ren-Hung Hwang, and Fred Baker’s Computer Networks: An Open Source Approach is the first text to implement an open source approach, discussing the network layers, their applications, and the implementation issues. The book features 56 open-source code examples to narrow the gap between domain knowledge and hands-on skills. Students learn by doing and are aided by the book's extensive pedagogy.

Lin/Hwang/Baker is designed for the first course in computer networks for computer science undergraduates or first year graduate students.

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Variation. 1.2 UNDERLYING PRINCIPLES As the underlying technology of data communications, packet switching has laid down the principles for data communications to follow. We can divide the set of principles into three categories: performance, which governs the quality of services of packet switching, operations, which details the types of mechanisms needed for packet handling, and interoperability, which defines what should be put into standard protocols and algorithms, and what should not.

Vendors, maintaining such a large team is too costly. Thus, they would rather resort to the third-party solutions provided by software or IC vendors lin76248_ch01_001-053.indd 32 24/12/10 4:11 PM Chapter 1 Fundamentals 33 who transfer their implementations to system vendors and charge them a licensing fee and per-copy royalty (for software) or a purchase price (for ICs). The open source implementations of software and ICs offer the third way of implementing a system. Without having to.

Each call lasting for 5 minutes on average, and there are 6 hops (i.e. 6 links and 6 nodes) on average between the callers and callees. How many memory entries are occupied on average to support the switched connectivity worldwide? lin76248_ch01_001-053.indd 52 6. In a clustering of 4,294,967,296 nodes, if we still want to keep the three-level hierarchy like the one in Figure 1.1 but like to have the same number of group members, groups, and supergroups at the group, supergroup, and.

Amplitude, the phase, or the frequency of a digital bit stream. The process is called digital passband modulation, or simply digital modulation, in contrast to the digital baseband modulation or line coding. Either the modulated signals or the original digital signals could be further multiplexed onto a physical channel to better utilize the channel. We first introduce the fundamental digital modulation schemes, including amplitude-shift keying (ASK), phase-shift keying (PSK), frequency-shift.

Figure 2.34, a spread spectrum system is usually followed by a passband modulator such as BPSK, M-ary PSK (MPSK, M is greater than 2), and QAM. Figure 2.35(a) shows a scenario where a DSSS system is followed by an M-ary PSK modulator. Because the MPSK modulator has in-phase and quadrature components, the system requires two spreading processes. The input data are split into two data lin76248_ch02_054-124.indd 100 24/12/10 4:13 PM Chapter 2 dt Input data S/P Spreading pnt I txi Q txq.

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