The prosafe plus switches optimise the traffic in your network by enabling port as well as tag based prioritisation in this way the traffic that cannot wait gets preference over the less critical traffic packets the switch masters the so called igmp v3 snooping this function is necessary for distributing the iptv data multicast via this switch in such a way that there are no disturbing hangers at the tv set in case other network devices generate traffic at the same timethe vlan technology