SAP-C02 第 372 题
题目
A company has a website that serves many visitors. The company deploys a backend service for the website in a primary AWS Region and a disaster recovery (DR) Region. A single Amazon CloudFront distribution is deployed for the website. The company creates an Amazon Route 53 record set with health checks and a failover routing policy for the primary Region’s backend service. The company configures the Route 53 record set as an origin for the CloudFront distribution. The company configures another record set that points to the backend service's endpoint in the DR Region as a secondary failover record type. The TTL for both record sets is 60 seconds. Currently, failover takes more than 1 minute. A solutions architect must design a solution that will provide the fastest failover time. Which solution will achieve this goal?
中文翻译:
一家公司有一个为许多访问者提供服务的网站。该公司在主要 AWS 区域和灾难恢复 (DR) 区域中为网站部署了后端服务。为网站部署了单个 Amazon CloudFront 发行版。该公司创建了一个 Amazon Route 53 记录集,其中包含主要区域后端服务的运行状况检查和故障转移路由策略。该公司将 Route 53 记录集配置为 CloudFront 分配的源。该公司配置了另一个记录集,该记录集指向 DR 区域中的后端服务端点作为辅助故障转移记录类型。两个记录集的 TTL 均为 60 秒。目前,故障转移需要 1 分钟以上。解决方案架构师必须设计一个能够提供最快故障转移时间的解决方案。哪种解决方案将实现这一目标?
选项
A. Deploy an additional CloudFront distribution. Create a new Route 53 failover record set with health checks for both CloudFront distributions.
中文翻译:
部署额外的 CloudFront 发行版。创建一个新的 Route 53 故障转移记录集,并对两个 CloudFront 分配进行运行状况检查。
B. Set the TTL to 4 second for the existing Route 53 record sets that are used for the backend service in each Region.
中文翻译:
对于每个区域中用于后端服务的现有 Route 53 记录集,将 TTL 设置为 4 秒。
C. Create new record sets for the backend services by using a latency routing policy. Use the record sets as an origin in the CloudFront distribution.
中文翻译:
使用延迟路由策略为后端服务创建新的记录集。使用记录集作为 CloudFront 分配中的源。
D. Create a CloudFront origin group that includes two origins, one for each backend service Region. Configure origin failover as a cache behavior for the CloudFront distribution.
中文翻译:
创建一个包含两个源的 CloudFront 源组,一个用于每个后端服务区域。将源故障转移配置为 CloudFront 分配的缓存行为。
答案
D
解析
正确答案:D 解析: 本题应选择 D。 正确选项: D. 创建一个包含两个源的 CloudFront 源组,一个用于每个后端服务区域。将源故障转移配置为 CloudFront 分配的缓存行为。 选择理由: 该选项最直接地满足题干中的关键约束。做 SAP-C02 题目时,需要同时对照题干里的限定词,例如最高性能、最低运维开销、成本效益、可靠性、可扩展性、安全性、RTO/RPO、合规要求等。本题相关考点主要包括:Route 53、Cloud...