[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"cheat-sheet---en":3,"domain-info---en":3,"topic-info----en":3,"lesson-aws-certified-cloudops-engineer-associate-networking-content-delivery-dns-and-content-delivery-cloudfront-distributions-en":4,"prev-aws-certified-cloudops-engineer-associate-networking-content-delivery-dns-and-content-delivery-cloudfront-distributions-en":21,"next-aws-certified-cloudops-engineer-associate-networking-content-delivery-dns-and-content-delivery-cloudfront-distributions-en":34},null,{"locked":5,"reason":6,"meta":7,"item":3},true,"paywall",{"title":8,"description":9,"isFree":10,"estimatedMinutes":11,"difficulty":12,"learningObjectives":13},"CloudFront Distributions","A CloudFront distribution is a set of rules that decide, at an edge location, whether to answer from cache or ask your origin. This lesson covers cache behaviors and their matching order, the cache key, the TTL rules that override your Cache-Control headers, invalidation, HTTPS with custom domains, and locking the origin down with OAC.",false,32,"advanced",[14,15,16,17,18,19,20],"Describe the path a request takes through an edge location, a regional edge cache, and the origin, and name the requests that skip the regional edge cache","Order cache behaviors correctly and predict which one applies to a given request path","Explain what the cache key is and identify the settings that lower a cache hit ratio","Predict the cached duration of an object from the Minimum, Maximum, and Default TTL values and the origin's Cache-Control header","Choose between invalidation and versioned file names for a content update","Configure an alternate domain name with HTTPS, including the Region an ACM certificate must live in","Lock an S3 origin to a distribution with origin access control and explain why OAC replaced OAI",{"locked":5,"reason":6,"meta":22,"item":3},{"title":23,"description":24,"isFree":10,"estimatedMinutes":25,"difficulty":26,"learningObjectives":27},"Route 53 Routing Policies","Eight routing policies answer the same question differently: given this query, which of my endpoints should the caller get? This lesson covers health checks first, then each policy, and the boundaries between the 3 policies that all claim to route by location.",30,"intermediate",[28,29,30,31,32,33],"Describe the 3 health check types and explain the 18% rule that decides whether an endpoint is healthy","Calculate the traffic share of a weighted record and predict what happens when a weight is 0","Distinguish latency, geolocation, geoproximity, and IP-based routing by the input each one actually uses","Configure active-passive failover with failover records and active-active failover with any other policy","Explain what multivalue answer routing returns and why it is not a load balancer","Select the correct routing policy from the constraint stated in a scenario",{"locked":5,"reason":6,"meta":35,"item":3},{"title":36,"description":37,"isFree":10,"estimatedMinutes":38,"difficulty":26,"learningObjectives":39},"Global Accelerator against CloudFront","Both services put AWS edge locations in front of your workload, and only one of them caches. This lesson covers Global Accelerator's anycast static IPs, listeners, endpoint groups, and traffic dials, then draws the boundary that decides which service a scenario is describing.",24,[40,41,42,43,44],"Explain how anycast static IP addresses and the AWS global network shorten the path from a client to a regional endpoint","Describe the components of a standard accelerator: listeners, endpoint groups, endpoints, and network zones","Distinguish a traffic dial from an endpoint weight and choose the right one for a given traffic-shifting requirement","Compare standard accelerators with custom routing accelerators","Choose between CloudFront and Global Accelerator from the protocol, cacheability, and addressing constraints in a scenario"]