d, servers need a database back-end to
hold the session's parameters.  Every GnuTLS session after a successful
handshake calls the appropriate back-end function (see *note resume::)
to store the newly negotiated session.  The session database is examined
by the server just after having received the client hello(1), and if the
session ID sent by the client, matches a stored session, the stored
session will be retrieved, and the new session will be a resumed one,
and will share the same session ID with the previous one.

   ---------- Footnotes ----------

   (1) The first message in a TLS handshake