you take 1 dumb ethernet switch, you connect 1 PC to it which is on say 192.168.100.0/24 and 1 PC which is on 192.168.200.0/24. Here we have an H1 with foreground and background colours set against a page with a patterned background. true, but he is using the broadcast address 255.255.255.255, which afaik, you should be able to do in linux - and he has no router. The ability to set the opacity on a colour differs subtly from setting the opacity on an element using the CSS opacity property. This means that we can set not only the red, green and blue values, but also control how much of what’s behind the colour shows through. The A stands for Alpha, which refers to the level of opacity of the colour, or to put it another way, the amount of transparency. This is fine and dandy, but whatever values we specify have one thing in common - the colours are all solid, flat, and well, a bit boring.ĬSS3 introduces a couple of new ways to specify colours, and one of those is RGBA.
We’re all familiar with specifying colours in CSS using by defining the mix of red, green and blue light required to achieve our tone. Instead we’d used RGBA colour values, which is part of the CSS3 specification. If 255.255.255.255 is true then why is 123.123.255.255 left unused Note that I'm assuming that a broadcast can't reach outside its subnet. When we launched, a lot of people were surprised that the design wasn’t built with PNGs. (Which is 255.255.255.255) Or does it send it to 'the all ones of the subnet' (For example if the subnet is 123.123.0.0/16 then broadcast to 123.123.255.255). For example the range of IPs 224.0.0.0 - 239.255.255.255 are used only for multicast purposes etc. To have more control and reduce inter-operability issues, there are some standards in place to use IP addresses. When Tim and I were discussing the redesign of this site last year, one of the clear goals was to have a graphical style without making the pages heavy with a lot of images. Technically IP address range is from 0.0.0.0 - 255.255.255.255.
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