[vcf-midatlantic] Greenbar printout DONE!
mcguire at neurotica.com
Mon Mar 1 18:44:11 UTC 2021
On 3/1/21 7:23 AM, Neil Cherry wrote:
>>> I took a course on networking (having worked in networking for about
>>> 20 years at that point) and
>>> the course described switching hubs as routing packets. I went a bit
>>> nuts on the professor for
>>> the double whammie (it was on a test).
>> The guy did that to you on a test?! Wow what a dick.
>> Yep. Someone who doesn't know any better could be forgiven for
>> thinking that switches "route" packets to the appropriate port,
> Switches switch frames. I couldn't bare to bring myself to replace
> switch with "route". Not after
> arguing with a CCIE about OSPF exchanging routing information.
There's a fine line between terminological correctness and "accepted
usage". The weird thing (well, weird to me I guess, but I suppose it
makes sense) is that the latter eventually turns into the former!
> At least he got up to ARP correct.
Well that's something.
>> which they do. But, we draw a distinction between routing and
>> switching, because they happen at different layers of the dip.
>> Just like someone could be forgiven for thinking "broadband" is
>> "bandwidth that is broad" and thus has something to do with
>> transmission speed.
>> But, in my lifelong study of becoming the absolute best a**hole
>> that a man can be, I forgive neither. ;)
> Routers route packets (L3), although they can switch packets now, which
> is a bit disconcerting but
> technical correct.
> Switches switch frames (L2).
> Frames contain packets.
Yup. Unless you're working with raw Ethernet, not in the context of
IP or even the seven-layer reference model, and datasheets for Ethernet
MAC ICs frequently refer to frames as packets. So, definition depends
on context...making it even worse.
> Let's skip vlans for now. they just make my brain ache more. ;-)
VLANs sure are nice, though.
> When talking* (hehe) network engineering, being this pedantic is a
> * - Sorry, about the poor English. It was meant as humor. But many of
> discussions bordered on text book bad English while arguing about
> correct terminology.
True, but speaking only for myself, I really only care about
Dave McGuire, AK4HZ
New Kensington, PA
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