Glossary: TCP/IP in Depth, Part 2
DF flag
Also written: DF, Don't Fragment
An IPv4 header flag that forbids routers from fragmenting the packet. A router must drop a too-big DF packet and should send back ICMP "fragmentation needed".
Glossary: TCP/IP in Depth, Part 2
Also written: DF, Don't Fragment
An IPv4 header flag that forbids routers from fragmenting the packet. A router must drop a too-big DF packet and should send back ICMP "fragmentation needed".