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To: BDR who wrote (30342)8/24/2000 2:03:54 AM
From: EnricoPalazzo  Respond to of 54805
 
OT: GBit/s backbones...

You have one four-way highway that splits into four one-lane roads. Each lane has ten cars per mile, and cars always travel a mile a minute (60 MPH). If you're standing on the shoulder of the highway, you see 40 cars passing by you per minute. If you're standing on the shoulder of one of the roads, you see 10 cars passing by you per minute. So the highway's "bandwidth" is 40 cars/minute, which is greater than a road's "bandwidth" of 10 cars/minute.



To: BDR who wrote (30342)8/24/2000 3:40:52 AM
From: FaultLine  Read Replies (1) | Respond to of 54805
 
where and how in the system is the data being held or stored until delivery?

I had a phone link to my ISP for many years. This ISP is connected directly to the MCI backbone. Now suppose I ask for a 4 MB video clip. Let's further suppose that the video server can send that whole video in a second or so. My ISP will buffer up the entire clip and proceed to bleed it out to me via my phone hookup at 56 KB <the horror, the horror...>

Now suppose my ISP were a couple of hops from the backbone and each hop down the chain runs at a lower bandwidth. Each "supplier" at each hop has to buffer the flow to its subordinate right on down to my house

Regards,
FaultLine
.