Discover which Amazon Virtual Private Cloud (VPC) feature incurs a cost – Subnets, Internet Gateways, NAT Gateways, or the Main Route Table. Master the fundamentals of AWS networking.
Table of Contents
Question
Which virtual private cloud (VPC) feature has a cost associated with it?
A. Subnets
B. Internet gateways
C. NAT gateways
D. The main route table
Answer
C. NAT gateways
Explanation
Subnets, route tables, internet gateways, security groups, and network access control lists (network ACLs) don’t cost you anything. You are billed for NAT gateways.
Of the listed Amazon Virtual Private Cloud (VPC) features, only NAT Gateways have an associated cost. Here’s a breakdown:
A. Subnets – Subnets are a fundamental component of VPCs that enable you to group resources based on security and operational needs. There is no additional cost for creating and using subnets within a VPC.
B. Internet Gateways – An Internet Gateway allows communication between instances in your VPC and the internet. It is a horizontally scaled, redundant, and highly available VPC component. There is no additional charge for using an Internet Gateway.
C. NAT Gateways – A NAT (Network Address Translation) Gateway enables instances in a private subnet to connect to the internet or other AWS services while preventing the internet from initiating a connection with those instances. Unlike other VPC features, NAT Gateways do incur an hourly charge for each “NAT Gateway-hour” used, as well as data processing and data transfer fees.
D. Main Route Table – The main route table is the default routing table created with a VPC. It controls the routing for all subnets that are not explicitly associated with any other route table. There is no additional cost associated with using the main route table.
In summary, NAT Gateways are the only VPC feature among the options provided that have an associated cost, while subnets, Internet Gateways, and the main route table do not incur additional charges for their usage.
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