A Network Engineer Deploys an Application in a Private Subnet

question 136

Multiple Choice

A network engineer deploys an application in a private subnet in a VPC that connects to many external video feed providers using RTMP over the internet. A NAT gateway has been deployed in a public subnet and is working as expected. From the Amazon EC2 instance, the application is able to connect to all feed providers except one, which hangs when connecting. Manually testing a connection from an Amazon EC2 instance in the public subnet to the problem feed indicates that the feed works as expected. What is causing this issue?

• A) The NAT gateway does not support fragmented packets.
• B) The internet gateway only supports an MTU of 1500 bytes.
• C) An Amazon EC2 instance expects to communicate with an MTU of 9001.
• D) The security group on the instances does not allow PMTUD.

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Urban Underclass

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