Re:Now that we have IPv6 – do we need TCP/UDP port numbers a...
by zamalek on Tuesday July 14, 2015 @05:47AM
(#9883753)
> I'd like to know other reasons why we need port numbers
Because SRV records aren't in widespread use (by specification and only consequently implementation). First you would need to stop using the A (or AAAA) record, on all existing protocols. This is a good thing because, comparatively, the A record is pretty stupid. However, it's never going to happen for the same reason that you probably can't set up an SRV record with whoever is hosting your DNS.
Also, ports are a portion of an address that routers can ignore - making them better at what they do. With multiple addresses per host you are going to annihilate routing tables/caches and make the internet slower.
Because SRV records aren't in widespread use (by specification and only consequently implementation). First you would need to stop using the A (or AAAA) record, on all existing protocols. This is a good thing because, comparatively, the A record is pretty stupid. However, it's never going to happen for the same reason that you probably can't set up an SRV record with whoever is hosting your DNS.
Also, ports are a portion of an address that routers can ignore - making them better at what they do. With multiple addresses per host you are going to annihilate routing tables/caches and make the internet slower.