Browsing articles in "Tech"
Jan
10
2007

Why is There a Minimum Ethernet Framesize?

An ethernet frame has a minimum size of 64 bytes and a maximum size of 1500 bytes. But why is there a minimum? An ethernet frame has a minimum size because anything that is shorter than the 64 byte minimum because anything shorter is interpreted by receiving stations as a collision. A transmitting station will begin transmission when it can sense that there is no other transmitting stations (carrier sense). The transmitting station will not […]

Jan
10
2007

OSI Model

The OSI Model is the theoretical model that data communications are based on, but in reality, there aren’t really any real life technologies that follow the model particularly well. Here we’ll discuss how the OSI model maps to the TCP/IP stack. Layer 1 – Physical Layer Cabling, etc, anything that deals with the physical medium It determines the type of signaling used, which ultimately determines your bandwidth Devices: Hubs, cables, wireless signal, etc. Layer 2 […]

Jan
10
2007

Rails Flash Helpers

Rails allows for the posting of errors through use of flashes. Calling something like flash[:notice] = “Login Successful” in your controller will allow you to display it in your view by calling the following code in your view. The types of flashes you can use are not pre-defined so if you wanted to use flash[:pearl_jam] you could. That being said, there are some generally recognized types of flashes that folks are standardizing around. The most […]

Jan
5
2007

Software Development

At a recent computer software engineering seminar, the participants were given an awkward question to answer: “If you had just boarded an airliner and discovered that your team of programmers had been responsible for the flight control software, how many of you would disembark immediately?” Only one man sat motionless among the ensuing forest of raised hands. When asked what he would do, he replied that he would be quite content to stay aboard. With […]

Jan
5
2007

Rails Tips & Tricks

Over two years ago, I had a summer job programming in Ruby on Rails. I had never used Ruby or Rails before, but was familiar with the MVC framework and had used it in a J2EE environment programming with Eclipse, Tomcat, etc. They told me to read up on Ruby and Rails for a week (while I was on vacation) and they’d see me in one week. Going from J2EE to Rails was a dramatic […]

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