This object counts the number of IPv4 packets that have been successfully reassembled after arriving in fragments across the network. When IP packets exceed the network's maximum transmission unit (MTU), routers fragment them into smaller pieces that must be reassembled at the destination; this counter tracks successful reassemblies. This object is deprecated in favor of version-neutral counters, but legacy systems may still use it to monitor IP fragmentation and reassembly performance on older networks.