For the record, I'm sitting at this instant in Tokyo Station, and am on my
way from Narita to Yokohama. I am sitting in the green car, and I accessed
the appropriate web page.
I have wonderful 802.11 connectivity, and I have an IP address. Whether
that means I can use the Internet is another question. On the parts of the
track where the connectivity is there, we see ping round trip delays
varying from 380 ms to over four seconds. There are fairly large parts of
the track where the NTT DoCoMo 3G data connectivity appears to simply not
be there - especially when in concrete tubes and ditches, but also on
places with open track.
So I think here the term "seamless", when applied to connectivity, doesn't
No, not seamless, but I managed to download a lot of email on the train.
--Steve Bellovin, http://www.research.att.com/~smb (me)
http://www.wilyhacker.com ("Firewalls" book)