Telecom and Networking

Linux networking articles

Linux Journal has published several interesting articles on Linux networking. Here are some of the most interesting of them. Queueing in the Linux Network Stack tells that packet queues are a core component of any network stack or device. They allow for asynchronous modules to communicate, increase performance and have the side effect of impacting

A Live Map of Ongoing DDoS Attacks

I just saw yesterday an interesting Digital Attack Map This Live Map of Ongoing DDoS Attacks is a Digital Attack Map that was produced in a collaborative effort by Google Ideas and Arbor Networks to raise awareness about distributed denial of service attacks that try to choke or shutdown websites. Typical reasons for attacks: sites

VGA over UTP

I have written about sending video signals over UTP cable. I have covered single composite video signal and audio. Now it is time to discuss sending VGA over UTP cable. Some DIY people (including me) have built different kind of adapters from VGA connector to RJ-45 connector. In best cases simple passive connection between those

Acronym definitions

The fields of electronics, computers and telecommunications is filled with acronyms. To help in surviving on this world of acronyms I started to compile in the 1990′s my own list of acronyms, and you can find my collection of acronym definitions (over 19000 definitions) at ePanorama.net acronym search. You should be able to find most

Internet.org

Internet.org seems to be on news today everywhere. Facebook Leads an Effort to Lower Barriers to Internet Access article tells that half a dozen of the world’s tech giants, including Samsung, Nokia, Qualcomm and Ericsson, have agreed to work with the company as partners on the initiative, which they call Internet.org. The plan is to

Arduino cellphone

Hackaday mentioned some time ago an interesting Arduino cellphone. The fact that you can build a cellphone around an Arduino is pretty neat: An Average Joe can build this thing with a minimum or background knowledge and without breaking the bank. Wow. The components include and Arduino Uno, GPRS shield from Seeed Studios, a TFT

Lightning protection

Every summer we get thunderstorms, with the accompanying lightning in Finland. It is expected that thunderstorms starts in few days. Varo! Torstaina salamoi article says that it is expected that next Thursday there will be (according to weather forecast) 5000-10000 lightning discharge events in Finland. Lightning is a massive electrostatic discharge between electrically charged regions