What is a DDoS attack, and what services can minimize them?
A DDoS attack is a malicious attempt to disrupt the normal functioning of a targeted server, service, or network by overwhelming it with a flood of internet traffic, and services like AWS Shield, AWS WAF, and Amazon CloudFront can help minimize their impact.
How do you set up a system to monitor website metrics in real-time in AWS?
To set up real-time website metrics monitoring in AWS, use Amazon CloudWatch to collect and track metrics, AWS Lambda for processing data, and Amazon Kinesis for real-time streaming of website activity, along with setting up dashboards for visualization.
What are the different types of virtualization in AWS, and what are the differences between them?
AWS primarily uses two types of virtualization: **paravirtualization** (PV), which requires modified guest OS and provides lower overhead, and **hardware virtualization** (HVM), which allows unmodified guest OS and offers better performance and compatibility with various operating systems.
Name some of the AWS services that are not region-specific
Some AWS services that are not region-specific include AWS Identity and Access Management (IAM), AWS CloudFront, AWS Route 53, and AWS WAF.
What are the differences between NAT Gateways and NAT Instances?
NAT Gateways are managed services that provide automatic scaling and high availability for outbound internet traffic from private subnets, while NAT Instances are user-managed EC2 instances that require manual configuration, scaling, and maintenance.