亚马逊云科技 re:Invent 2023 产品体验：亚马逊云科技产品应用实践 王炸产品 Amazon Q，你的 AI 助手

Q：Hi,I want create a linux system instance to host my website,I should choose ec2 or lightsail?A：Here are the key factors to consider when choosing between Amazon EC2 and Lightsail for hosting your website:
- Lightsail is easier to use and manage if you have a simpler workload like a basic website or app. It provides pre-configured options that can be set up with just a few clicks. 
- EC2 gives you more flexibility and control over your server configuration but requires more devops knowledge. You have to manage components like networking and security groups yourself.
- Lightsail instances have fixed configurations while EC2 allows you to choose the exact compute, memory, storage and networking capabilities you need.
- The Lightsail interface provides an all-in-one dashboard for managing your resources while EC2 requires using different AWS console pages for different tasks.
- Basic Lightsail plans have all the necessary components included in a monthly flat fee. With EC2 you pay separately for individual resources like instances, storage, networking etc.
For a simple website that doesn't have demanding technical requirements, Lightsail would be easier to get started with. But for more complex or resource-intensive workloads, EC2 gives you more power and customization options at the cost of requiring more devops expertise.Sources[1] [What are the differences between Amazon EC2 and Amazon Lightsail?] (https://repost.aws/knowledge-center/lightsail-differences-from-ec2)复制代码

Q:If routes are advertised outside of AWS network, will this ASN bepre-pend to the AS-path attribute of a route? If routes are advertised insideAWS network, will this ASN be pre-pend to the AS-path attribute of a route?
A:If routes are advertised outside of the AWS network, the ASN associated with the AWS Direct Connect connection or AWS Transit Gateway will not be prepended to the AS-path attribute of the route. This is because AWS does not actually handle routing or see the traffic in this case. 
If routes are advertised within the AWS network (e.g. between a VPC and a Direct Connect gateway or Transit Gateway), the ASN will not be prepended to the AS-path either. AWS uses other mechanisms like local preference to determine the best path within AWS without modifying the AS-path. 
The AS-path is generally not modified by AWS, but customers can influence route selection and traffic flow within AWS by configuring:
1. Local preference BGP communities 2. Advertising routes with different AS-path lengths3. Configuring the AS-path attribute for interfaces in the same region
For more details on routing and BGP configurations within AWS, please refer to the AWS documentation pages on Direct Connect, Transit Gateway and VPC routing. The documentation provides the most accurate and up-to-date information.Sources[1] [Using AS-Path attribute to influence routing over multiple regions] (https://repost.aws/questions/QUPLkeHS0oT5qkHJv0d_9owA/using-as-path-attribute-to-influence-routing-over-multiple-regions)[2] [AWS Transit Gateway ASN visibility ] (https://repost.aws/questions/QUbFjl8tPNS7uwBFMtQGdJFw/aws-transit-gateway-asn-visibility)[3] [How Amazon Route 53 uses EDNS0 to estimate the location of a user - Amazon Route 53] (https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy-edns0.html)复制代码