Refer to the exhibits.
The configuration of Windows PC, PC 1, with a default MTU of 1500 bytes, FortiGate interfaces with an MTU of 1000 bytes, and the results of PC 1 pinging over server 172.16.0.251 are shown.
Why is the PC1 user unable to ping server 172.16.0.254 and seeing the message: Packet needs to be fragmented but DF set?