On Mon, Mar 12, 2012 at 5:14 PM, Iljitsch van Beijnum <iljitsch@muada.com> wrote:
On 12 Mar 2012, at 21:15 , William Herrin wrote:
Not at all. You just build a second tier to the routing system.
We already have two tiers: DNS names and IP addresses.
Hi Iljitsch, If only that were true. The DNS doesn't sit to the side of TCP, managing the moment to moment layer 4 to layer 3 mapping function the way ARP sits to the side of IP. Instead, the DNS's function is actuated all the way up at layer 7. This was the crux of my complaint about the getaddrinfo/connect APIs last week. Their design makes a future introduction of a transport protocol, something which actually does interact with the name service at the proper layer, needlessly hard. That and the common non-operation of the DNS TTL invalidates DNS' use as a routing tier. Regards, Bill Herrin -- William D. Herrin ................ herrin@dirtside.com bill@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004