In order to adjust the maximum size of the information sequences
transmitted by a plurality of terminals in a network, according to a
predetermined network protocol, between two subnetworks supporting
different maximum sizes of information sequence: there is stored in an
information base, for each of the terminals, an identifier for this
terminal and the maximum size of the information sequences allowed by the
network protocol for communicating with this terminal; the information
base is updated from the analysis of any information sequence conveyed in
one of the subnetworks; then, for each information sequence to be
transmitted: the identifier of the destination terminal and the
corresponding maximum size of the information sequences are read in the
information base; the maximum size read is compared with the current
maximum size allowed by the network protocol; and, if the maximum size
read is less than the current maximum size, the current maximum size is
adjusted by allocating to it the value of the maximum size read.