Comparing NAT Instances vs NAT Gateways

Answer - C.

The following are the key distinctions between NAT Instances and NAT gateways.

NAT Gateways.

NAT Instances.

Highly available.

NAT gateways in each Availability Zone are implemented with redundancy.

Create a NAT gateway in each Availability Zone to ensure zone-independent architecture.

Use a script to manage failover between instances.

Supports bursts of up to 10Gbps.

Depends on the bandwidth of the instance type.

Managed by AWS.You do not need to perform any maintenance.

Managed by you, for example, by installing software updates or operating system patches on the instance.

Cannot be associated with a NAT gateway.

You can associate security groups with your resources behind the NAT gateway to control inbound and outbound traffic.

Associate with your NAT instance and the resources behind your NAT instance to control inbound and outbound traffic.

For more information on the comparison, please visit the link:

http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-nat-comparison.html

NAT (Network Address Translation) is a service that allows private IP addresses to communicate with public IP addresses on the internet. AWS provides two options for NAT services: NAT instances and NAT gateways. Both options allow EC2 instances in a private subnet to communicate with the internet, but there are some differences between them.

A. The bandwidth of NAT gateways supports bursts of up to 10Gbps and for NAT instances it depends on the instance type. This statement is true. NAT gateways support up to 10Gbps of bandwidth, while the bandwidth of NAT instances depends on the instance type selected. NAT gateways are designed to handle bursty traffic and are automatically scaled up to handle increased traffic loads.

B. The NAT gateways are managed by AWS. This statement is true. NAT gateways are fully managed by AWS, meaning that AWS handles the scaling, availability, and maintenance of the service.

C. You can associate security groups with both the NAT instances and NAT gateways. This statement is true. Both NAT instances and NAT gateways can be associated with security groups, which control the traffic that is allowed to flow in and out of the NAT device.

D. NAT gateways are highly available by default. This statement is also true. NAT gateways are designed to be highly available by default. When you create a NAT gateway, it is automatically created in two different Availability Zones (AZs) for redundancy, and AWS ensures that the NAT gateway is always available and processing traffic.

Therefore, all of the options given are true, and there is no false statement when comparing NAT instances and NAT gateways.