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NEW QUESTION: 1

A. SingleResult
B. SingleRow
C. SequentialAccess
D. FastForwardReadOnly
Answer: C
Explanation:
SequentialAccess
Provides a way for the DataReader to handle rows that contain columns with large binary values. Rather than loading the entire row, SequentialAccess enables the DataReader to load data as a stream.

NEW QUESTION: 2
솔루션 아키텍트는 사용자가 기본 웹 사이트를 사용할 수 없는 경우 백업 정적 오류 페이지로 연결되는 솔루션을 설계하고 있습니다. 기본 웹 사이트의 DNS 레코드는 도메인이 ALB (Application Load Balancer)를 가리키는 도메인 인 Amazon Route 53에서 호스팅됩니다. 솔루션 설계자가 변화와 인프라 오버 헤드를 최소화하면서 회사의 요구를 충족시키기 위해 사용해야 합니까?
A. Route 53 액티브-패시브 페일 오버 구성 설정 Route 53 상태 확인에서 ALB 엔드 포인트가 비정상임을 확인하면 Amazon S3 버킷 내에서 호스팅되는 정적 오류 페이지로 직접 트래픽
B. 지연 시간 기반 라우팅 정책을 사용하도록 Route 53 레코드 업데이트 트래픽이 가장 반응이 빠른 엔드 포인트로 전송되도록 Amazon S3 버킷 내에 호스팅 된 백업 정적 오류 페이지를 레코드에 추가
C. ALB를 원점 중 하나로 사용하여 Route 53 별칭 레코드를 Amazon CloudFront 배포에 지정한 다음 배포에 대한 사용자 지정 오류 페이지를 생성하십시오.
D. ALB 및 정적 오류 페이지를 호스팅하는 Amazon EC2 인스턴스를 사용하여 Route 53 액티브-액티브 구성을 설정합니다. 엔드 포인트 Route 53은 ALB에 대한 상태 확인에 실패한 경우에만 인스턴스에 요청을 보냅니다.
Answer: C
Explanation:
Active-passive failover
Use an active-passive failover configuration when you want a primary resource or group of resources to be available the majority of the time and you want a secondary resource or group of resources to be on standby in case all the primary resources become unavailable. When responding to queries, Route 53 includes only the healthy primary resources. If all the primary resources are unhealthy, Route 53 begins to include only the healthy secondary resources in response to DNS queries.
To create an active-passive failover configuration with one primary record and one secondary record, you just create the records and specify Failover for the routing policy. When the primary resource is healthy, Route 53 responds to DNS queries using the primary record. When the primary resource is unhealthy, Route 53 responds to DNS queries using the secondary record.
How Amazon Route 53 averts cascading failures
As a first defense against cascading failures, each request routing algorithm (such as weighted and failover) has a mode of last resort. In this special mode, when all records are considered unhealthy, the Route 53 algorithm reverts to considering all records healthy.
For example, if all instances of an application, on several hosts, are rejecting health check requests, Route 53 DNS servers will choose an answer anyway and return it rather than returning no DNS answer or returning an NXDOMAIN (non-existent domain) response. An application can respond to users but still fail health checks, so this provides some protection against misconfiguration.
Similarly, if an application is overloaded, and one out of three endpoints fails its health checks, so that it's excluded from Route 53 DNS responses, Route 53 distributes responses between the two remaining endpoints. If the remaining endpoints are unable to handle the additional load and they fail, Route 53 reverts to distributing requests to all three endpoints.
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-types.html
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-problems.html

NEW QUESTION: 3
How are the Cisco Express Forwarding table and the FIB related to each other?
A. Cisco Express Forwarding uses a FIB to make IP destination prefix-based switching decisions correct
B. The FIB is used to populate the Cisco Express Forwarding table
C. The Cisco Express Forwarding table allows route lookups to be forwarded to the route processor for processing before they are sent to the FIB
D. There can be only one FIB but multiple Cisco Express Forwarding tables on IOS devices
Answer: A
Explanation:
The Forwarding Information Base (FIB) table - CEF uses a FIB to make IP destination prefix-based switching decisions. The FIB is conceptually similar to a routing table or information base. It maintains a mirror image of the forwarding information contained in the IP routing table. When routing or topology changes occur in the network, the IP routing table is updated, and these changes are reflected in the FIB. The FIB maintains next-hop address information based on the information in the IP routing table.
Reference:
ciscoef.html