In eusocial insects, the division of labour means, among other things, that only few individuals forage for the entire colony. The survival of the colony depends on their efficiency in fitting the nutritional needs of all its members. We aimed at measuring the network topology and at understanding the role and centrality of each caste in this network and as a consequence on food dissemination across castes. We constructed the trophallaxis networks from 34 food exchanges experiments-in black garden ants (Lasius niger). We tested the influence of brood and colony size on: (i) global indices at the network level, i.e. efficiency, resilience, centralisation and modularity; (ii) the individuals' values of degree, strength, betweenness and clustering coefficient. Network resilience, which is the ratio between global efficiency and centralisation, is stable with colony size but increases with the presence of a brood, in order to possibly respond to the needs of larvae. Individual metrics highlighted the major role of foragers in food dissemination. In addition, a hierarchical clustering analysis suggested that some trophallactic network against resource quality.