25 Nov
2003
25 Nov
'03
9:20 a.m.
On Tue, 25 Nov 2003, Rob Thomas wrote:
Our choke points were always our peering or transit links. This was the case for our (large) enterprise customers as well.
Some people refer to it as the hourglass effect, but it has more than one bump. Generally only the smallest bottleneck controls the congestion. But worms and DDOS (but not DOS) violate some of the assumptions. lower bandwidth<---->higher bandwidth Local Area Network (LAN) Campus Area Network Customer to ISP uplink ISP POP to Backbone ISP Intra-Backbone ISP to ISP transit/peer (same continent) Intercontinental circuits Of course, there are some exceptions like a customer with an OC192 uplink or an ISP running a web hosting center on a ISDN link.