CDN and DDoS Capabilities in Azure Static Web Apps

Question

Hi,

I want to deploy a single page application and was exploring the documentation of Static Web Apps.

Documentation says that it provides globally distributed static content. Another part of documentation says that if we use Enter enterprise-grade edge (front door) with static web app, it would provide caching at edge and Global presence in 118+ edge locations across 100 metro cities.

I want to know what is the difference in CDN/edge caching capabilities of Static Web App with and without using enterprise-grade edge (front door).

Second question is regarding DDoS protection. If we don't use enterprise-grade edge, then is DDoS protection provided. If yes, at which all layers L3, L4, L7.

If we use enterprise-grade edge, it will internally use Front door but without WAF. In this case at which all layers L3, L4, L7 will it provide DDoS protection.

Thanks!