You are trying to send packets from an EC2 Instance to an on-premises server over AWS Direct Connect using Public Virtual Interface. You have set Jumbo frames due to the size of the packets being sent. But the packets are being dropped. What needs to be done to ensure that the packets don’t get dropped?

Answer options:

A.Ensure that the MTU is set to 9001
B.Ensure that the “Do Not Fragment” flag is set in the IP header
C.Ensure that the “Do Not Fragment” flag is not set in the IP header
D.Enable Enhanced Networking on the Instance

Answer – C
The AWS Documentation mentions the following.
Jumbo frames allow more than 1500 bytes of data by increasing the payload size per packet and thus increasing the percentage of the packet that is not packet overhead. Fewer packets are needed to send the same amount of usable data. However, outside of a given AWS region (EC2-Classic), a single VPC, or a VPC peering connection, you will experience a maximum path of 1500 MTU. VPN connections and traffic sent over an Internet gateway are limited to 1500 MTU. If packets are over 1500 bytes, they are fragmented, or they are dropped if the Don`t Fragment flag is set in the IP header.
Option B is invalid because this would lead to dropping frames.
Option A is invalid because this is equivalent to Jumbo frames.
Option D is invalid because this would not resolve the issue.
For more information on Network MTU, please refer to the below URL
https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/network_mtu.html