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Questions tagged [dac]

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Direct attach copper physics

It seems that I do understand something about Direct Attach Copper (DAC) Cable and SFP/SFP+ terms. According to the wikipedia 10G DAC cable also referred as 10GSFP+Cu, 10GBASE-CR or 10GBASE-CX1, ...
Kamil Zaripov's user avatar
2 votes
1 answer
241 views

Support for 10GBase-T RJ45 SFP+ transceivers

Support for 10GBase-T RJ45 SFP+ transceivers in modern switches can be a hit and miss. What is the technical limitation as to why some switches don't support them? So far my understanding on the issue ...
GreenLantern22's user avatar
2 votes
1 answer
3k views

What is the difference between LR1 and LR4 optics?

Does anyone know what's the difference between LR1 and LR4 optics?
Rakesh Nittur's user avatar
2 votes
1 answer
246 views

Is configuring FEC mandatory in designing 100G networks? What's the difference FEC makes with DACs vs optics?

I have read a lot of information online but I am still not sure when do we exactly configure FEC and what are the advantages/disadvantages of configuring it. Does DAC transceivers always need FEC to ...
Rakesh Nittur's user avatar