A Comprehensive Introduction to Computer Networks by Christopher Winter

By Christopher Winter

This comprehension is designed to provide the reader a basic wisdom of the entire underlying applied sciences of machine networking, the physics of networking and the technical foundations.

The reader, might or not it's a scholar, a qualified or any will be enabled to appreciate cutting-edge applied sciences and give a contribution to community established company judgements, get the root for additional technical schooling or just get the mathematics of the know-how in the back of sleek verbal exchange technologies.

This e-book covers:

Needs and Social Issues
Basics to community Technologies
Type of Networks reminiscent of LAN, guy, WAN, Wireless
Networking reminiscent of Adapters, Repeater, Hub, Bridge, Router, etc.
Network protocol
What is info: Bits, Bytes and Costs
Bandwidth and Latency
Protocol Hierarchies and Layers
Design of Layers
Connection-Oriented and Connectionless Services
Reference Models
The OSI Reference Model
The TCP/IP Reference Model
Historical Networks reminiscent of web, ARPANET, NSFNET
The around the world Web
The structure of the Internet
The Ethernet
Wireless networks
Networking Standards
Hybrid Reference Model
The Hybrid Reference Model
The actual Layer and it’s Theoretical Foundations
The Fourier Analysis
Bandwidth-Limited Signals
The greatest facts cost of a Channel
Transmission Media
The basics of instant info Transmission
Satellite communique

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We can start a monitoring loop first to ensure our microphone works as intended with the following command: $ sox -d -d 4. Now, to send the audio from our microphone to the speakers on the Pi, use the following command: $ sox -d -t sox - | ssh pi@[IP address] sox -q -t sox - -d [ 40 ] Chapter 2 Attention Mac users You'll likely be flooded with warnings from the CoreAudio driver while SSH is waiting for you to input your password for the pi user. Just ignore the messages, type in your password anyway, and press the Enter key—the recording will proceed as normal.

Let's break down the command: • "C:\Program Files (x86)\PuTTY\plink" is the full path to the plink application. The quotes are necessary because of the space in the Program Files (x86) directory name. plink is like a command line version of PuTTY but more suitable for interfacing with other applications such as SoX in our example. • We specify that we want to log in as the user pi@[IP address] and to use the password –pw [password] because the command won't work if it has to pause and prompt us for that information.

Sox -q -t sox - -d then pipes that output to our local sox application which we've given a -q or quite mode argument for cosmetic reasons, otherwise SoX would show two competing progress displays. • The two -t sox arguments instruct SoX to use its own native, uncompressed file format, which is especially useful for transporting audio between SoX pipes like this one. [ 38 ] Chapter 2 Another useful trick is to be able to store the recording on your machine instead of the SD card on the Pi. wav Note the > character instead of the pipe, which is used to redirect the output to a file.

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