heartbeats

[Peter Hansen]

Tom Anderson wrote:
> On Fri, 9 Dec 2005, Sybren Stuvel wrote:
>>You probably mean "really a ping, just not an ICMP echo request".
> 
> What's a real ping, if not an ICMP echo request? That's pretty much the 
> definitive packet for internetwork groping as far as i know. I think that 
> the more generic sense of ping is a later meaning (BICouldVeryWellBW).

Submarines came before the 'net.  ;-)