gen-briefly-explain-packet-fragmentation-and-one-common-misconce-7220

Briefly explain packet fragmentation and one common misconception about it.

# Packet Fragmentation **What it is:** Packet fragmentation occurs when a data packet is too large to traverse a network link in one piece. The packet gets split into smaller fragments that can fit within the network's Maximum Transmission Unit (MTU), then reassembled at the destination. **Common misconception:** Many people believe that fragments are reassembled at each router or intermediate hop along the path. In reality, **fragments are typically only reassembled at the final destination host**, not at intermediate routers. Routers simply forward the fragments independently, and only the receiving endpoint performs reassembly. This misconception likely stems from confusion with how routers handle regular packet forwarding, but reassembling at every hop would create enormous overhead and defeat the purpose of fragmentation.