Tag Archives: network

Strange MAC addresses in your network (00:0D:3A:D7:F1:40 – 00:0D:3A:FF:FF:FF)

Posted on March 14, 2012 by Maris

Today I noticed many strange MAC addresses in our LAN. The addresses looked very similar – only few bits were changing. Sometime this happens, when Ethernet cable is damaged or due to network card malfunction. Here are some sample MAC … Continue reading →

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IPv6, literals and legacy software

Posted on October 5, 2010 by Maris

IPv4 address exhaustion is slowly going into final phase. To use IPv6 addresses in legacy software, some mechanism must be in place to not confuse programs with colons (:) in the addresses. For Windows this is IPv6 literals. We have … Continue reading →

Posted in Computers, Programming, Web | Tagged , , , | 1 Comment

How big HTML images / CSS / JS / png / etc. should be to fit network packet (MTU) efficiently

Posted on May 19, 2010 by Maris

List of little things that will make your website much faster. Not every webmaster knows, that 1 extra byte in jpg image, can cause 100% speed reduction / penalty for your website visitor. When you learn that MTU for Ethernet … Continue reading →

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