Monthly Archives: April 2012
Networking: Blocking Access to a Website via Extended Access List [Video]
This video demonstrates how to use an extended access list to prevent specific hosts from accessing a website. In this lab I use two Cisco 2811 routers [IOS 12.4(15)T1] and two Cisco 2950-24 switches [IOS 12.1(22)EA4].
Networking: Spanning Tree Protocol Basics [Video]
This video covers some of the basics of how Spanning Tree Protocol (STP) works in a network. To learn more about Spanning Tree Protocol see some of my prior blogs on STP.
Posted in Networking, Protocols, Technology
Tagged Loop Avoidance, loop prevention, network loops, Spanning Tree Protocol, STP
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Algebra: Linear Equations (Coin Problem) [Video]
I created and uploaded this video to youtube back in 2009. This video demonstates how to solve a simple algebra coin problem.
Chemistry: Calculate the Mass of an Atom [Video]
I created and uploaded this video to youtube back in 2009. This video demonstrates how to solve a simple chemistry problem. I calculate the mass of a Chlorine atom.
Python – Implementing Caching in Your Applications via Dictionaries
In this blog I demonstrate how you can implement and take advantage of caching in your Python scripts/applications. Caching allows you to complete tasks more rapidly by storing and reusing results for repeated operations using the same criteria. For example, … Continue reading
Posted in Chemistry, Programming Languages, Python, Science, Technology, Tips & Tricks
Tagged amu, atomic mass, atomic mass unit, atomic masses, cache, caching, caching scheme, chemistry, compound, dictionaries, dictionary, dictionary cache, element, formula mass, h2o, mass, molecular mass, molecule, Python, python dictionary, python dictionary cache, water
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