[ih] ARPANET pioneer Jack Haverty says the internet was never finished

[Vint Cerf]

CDN is a funny kind of asynchronous multicast....
v


On Fri, Mar 4, 2022 at 11:42 AM touch--- via Internet-history <
internet-history at elists.isoc.org> wrote:

> Minor point...
>
> > On Mar 4, 2022, at 7:43 AM, Guy Almes via Internet-history <
> internet-history at elists.isoc.org> wrote:
> >
> > Miles,
> >  The issue is not multicast vs not-multicast.
> >  The issue is doing multicast at the IP / Layer-3 level vs doing
> multicast at the Application leve
>
> Multicast needs to include L2 (see RFC3918, Sec 6). Without that, routers
> would need to do serial copy for every host inside each L2, which is
> prohibitive (i.e., this is why IGMP is *in addition* to PIM or other
> IP-level mechanisms).
>
> Joe
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