You manage a multi-region web service running on Google Kubernetes Engine (GKE) behind a Global HTTP/S Cloud Load Balancer (CLB). Due to legacy requirements, user requests initially pass through a third-party Content Delivery Network (CDN) before being routed to the CLB. You have already implemented an availability Service Level Indicator (SLI) at the CLB level. To improve coverage in case of potential load balancer misconfigurations, CDN failures, or other global networking issues, where should you measure this additional SLI? (Select two.)