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Which part of Data link layer is implemented as software.
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PostPosted: Sat Jun 02, 2012 3:37 am    Post subject: Which part of Data link layer is implemented as software. Reply with quote

A lot of data link protocols are implemented as software (PPP, HDLC, ARP etc...); but data link layer has the MAC sublayer which is implemented as a part of the NIC (hardware); this makes me believe that the Data link layer is implemented as part of the hardware, but then what's PPP, HDLC, ARP etc...?

So I assume that PPP, HDLC etc... are LLC sublayer related, so LLC is mostly implemented as software?
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PostPosted: Sat Jun 02, 2012 12:54 pm    Post subject: Reply with quote

Personally, I have never seen an 802.2 LLC-Frame, only Ethernet II Frames. Nevertheless ARP and PPP work like a charm. There is LLC related code in the kernel, under net/llc , so it seems very software-ish.
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PostPosted: Sat Jun 02, 2012 2:32 pm    Post subject: Reply with quote

It appears that no one knows for sure.
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PostPosted: Sat Jun 02, 2012 2:35 pm    Post subject: Reply with quote

I suggest you ask at the kernel netdev mailing list.
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PostPosted: Thu Jun 07, 2012 6:46 pm    Post subject: Reply with quote

I guess the answer is pretty obvious. It IS implemented at software level, otherwise we wouldn't have control over it in airspace.
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