tcp versus udp

[Martin McCormick]

Matt Baxter writes:
> When a response can not fit in a single UDP packet the server will mark 
> the
> truncated flag (and respond with all the data it can inside the UDP
> packet). That should trigger a client to resubmit the query via TCP. Zone
> transfers are the most common use for TCP, but it can be required for
> normal queries, although that is far from normal.

	My thanks to you and to 2 other list members who replied
off list. This confirms what I thought I remembered reading some
time before.

Martin McCormick