IPv4 header:Fragment offset, Flags (like MF), and Identification (Identifier) are related to fragmentation.Therefore TOS is not related to fragmentationImportant Point:The type of service (ToS) field is the second byte of the IPv4 header. The ToS field could specify a datagram's priority and request a route for low-delay, high-throughput, or highly-reliable service.Based on these ToS values, a packet would be placed in a prioritized outgoing queue or take a route with appropriate latency, throughput, or reliability.TOS is a field in IPv4 datagram. . It is a type of service that identifies the type of packets.