Understanding High VPN Charges and Reducing Costs
Question
A Startup company has primary Web servers hosted on an EC2 instance within a VPC.
Backup servers are deployed in a company-owned Data Centre.
Data replication occurs between Primary & backup servers every twelve hours & completes in less than 20 mins.
For connectivity between VPC & Data Centre, an AWS VPN connection is used.
They incurred a huge bill for a VPN connection.
The accounts manager of this company is concerned about the VPN billing which is high although used for less than 1 hour daily.
Which of the following statement will you, as an AWS consultant, choose to clarify charges to the Accounts Manager? (Select Two.)
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D. E.Correct Answer - A, E.
For AWS VPN, there are two charges involved,
1)VPN Connection Hours - Number of hours a VPN connection is in an available state.
It is not billed on hours when the VPN connection is active.
2) Data Transfer Charges - Data Centre is using the Internet to establish VPN connectivity to VGW.
So, it will be billed at Internet Out charges for Data Transfer from AWSto Datacenter.
All Data transfer in AWS from the Datacenter is free.
Option B is incorrect as Data Transfer Charges are billed only for data out of AWS & Data Transfer into AWS is free.
Option C is incorrect as Charges are for data transfer in the outbound direction from AWS & not for both directions.
Option D is incorrect as VPN connection hours will be hours when VPN connection is available & not when it's actively transferring data.
For more information on AWS VPN Charges, refer to the following URLs.
https://aws.amazon.com/vpn/pricing/ https://aws.amazon.com/ec2/pricing/on-demand/Sure, I'd be happy to explain the options.
A. Charges are based upon the number of connection hours VPN is available.
This statement is correct. AWS charges for the VPN connection on an hourly basis, based on the time it is available, regardless of whether it is in use or not.
B. Billing includes charges for Data Transfer IN from Datacenter to AWS over the Internet.
This statement could be true depending on the configuration of the VPN and the data transfer patterns. If data is transferred from the data center to the VPC over the internet via the VPN, then there will be charges for data transfer in. However, if data is transferred from the VPC to the data center over the VPN, then there would be no data transfer in charges.
C. Billing includes data transfer charges for data transferred in both directions between AWS VPC & Data Centre over the Internet.
This statement is correct. If data is transferred in both directions between the VPC and the data center over the VPN, then there will be charges for data transfer in both directions.
D. Charges are based upon number of connection hours VPN is active & in use.
This statement is incorrect. The charges for the VPN connection are based on the number of hours it is available, regardless of whether it is in use or not.
E. Billing includes charges for Data Transfer OUT from AWS to Datacenter over the Internet.
This statement could be true depending on the configuration of the VPN and the data transfer patterns. If data is transferred from the VPC to the data center over the internet via the VPN, then there will be charges for data transfer out. However, if data is transferred from the data center to the VPC over the VPN, then there would be no data transfer out charges.
In summary, options A and C are correct statements that would clarify the charges to the accounts manager. Options B, D, and E may or may not be relevant depending on the specifics of the configuration and data transfer patterns.
