Your team is using applications that are hosted in 2 different regions in AWS. There is also an on-premises network that needs to connect to AWS resources in these regions over the internet. It is noticed on the connection that the current MTU is 1500, and you want to increase the payload size per packet. How can you increase this limit?

Answer options:

A.Create a VPN tunnel between the 2 VPCs and increase the MTU on the instances.
B.Increase the MTU on the Instances.
C.Install the Enhanced Networking modules on the instances.
D.Use AWS Direct Connect and route packets between the on-premises network and AWS VPC using Jumbo Frames.

Answer – D
You are already working at the maximum allowable MTU of 1500 available for traffic traversing via the Internet. If you are in a VPC, then you can use Jumbo frames. This is also given in the AWS Documentation.
Jumbo frames allow more than 1500 bytes of data by increasing the payload size per packet, thus increasing the packet`s percentage 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.
Option A is invalid because the maximum MTU in a VPN tunnel is still 1,500.
Options B and C are invalid because this will still not affect the overall MTU.
For more information on Network MTU, please visit the following URL:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/network_mtu.html