Week #6: (2/25-3/1) Ethernet and Networking Concepts

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Week #6: (2/25-3/1) Ethernet and Networking Concepts

Post by rjagodowski »

We will begin and spend the next couple of weeks discussing Ethernet and Networking concepts. Ethernet is the prevailing networking technology used to allow computers & peripherals to share resources and access.

From Wisc-Online:

A Presentation of Bandwidth

Bandwidth Capacity Techniques

How Ethernet Works

Data Flow on the Internet


IP Addressing & Subnetting

What is DHCP?

Dynamic & Static IP Addresses in a TCP-IP Environment.

More info on IP networks:

IP Address Classes and Subnetting from TutorialsPoint.com. There are other good tutorials on this site about networking as well, such as this one from Pluralsight.com.

IP Address classes from Microsoft

IP Address Classes

How to Set Up a Private Network.

IPv4 vs. IPv6

Wireless Hardware (NOTE: Bluetooth IS NOT infrared, as this presentation suggests. It is a PAN (Personal Area Network), however.) For some additional background about the Electro-Magnetic Spectrum, check out this link. And this document probably has more on antenna design than you want to know:
The attachment Antenna.pdf is no longer available

For $99, Cisco offers this course on and Networking Fundamentals for Industrial Control Systems.

Decalogue for a Successful IoT Project.

Wireless Sensor Networks in Industrial Automation Here is the link to the complete Factory Automation Text with pdf download here: Here's a pdf on Wireless Sensor Networks for Industrial Process Monitoring and Control: Wikipedia on M2M

50 Sensor Applications for a Smarter World

Most wireless data systems use a form of "Spread Spectrum" (SS) communications. This of wide band communication scheme. This is a crude example, but thing of the FM radio band. You want to tune into WAQY, you adjust the tuner to 102.1 MHz and there it is. All of the time. FM commercial radio stations always transmit at the same frequency. That makes them easy to find. However, it also is not necessarily an efficient use of the total spectrum space of the FM band (roughly 88 MHz to 108 MHz, 20 MHz bandwidth). Each radio station must be separated by at least 200 kHz from an adjacent station to minimize interference. Spread Spectrum communication would have our WAQY transmitted distribute (spread) it's content over the entire 20 MHz FM spectrum. There are different ways of implementing this, but using our radio example, one way would be to use Frequency Hopping where WAQY would transmit at 102.1 MHz for a short period of time, then switch to 93.1 MHZ,a then 94.7 MHz, then 106.9 MHz, etc. Obviously, this would require the receiver (your radio) to tune into the same frequencies at the same times. It sounds complicated, but this tends to have numerous advantages principally in the way in which it fully utilizes the spectrum space (bandwidth), can support multiple users simultaneously, and noise immunity. These types of signals also offer a high level of security against "eaves-dropping" and a high resistance to jamming.

An Introduction to Spread Spectrum Communications.

The Difference Between Bit rate and Baud rate, more than one Bit per Baud.

QAM Comparison from Radio-Electronics.com

QAM from National Instruments.

QAM Tutorial (Pay special attention to Figures 3 & 4.
The attachment QAM Tutorial.pdf is no longer available
Way too mathematical for our discussions, but some good simulated QAM signals using Matlab: Matlab QAM Simulation.

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