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NEW QUESTION: 1
あなたの会社は、顧客向けイベント登録サイトを運営しています。このサイトは、Webおよびアプリケーション層サーバーとMySQLデータベースを備えた3層アーキテクチャーで構築されています。最小65％のサーバー容量と単一のMySQLデータベース。
このアプリケーションを3つのアベイラビリティーゾーン（AZ）がある地域にデプロイする場合、どのアーキテクチャーが高可用性を提供しますか？
A. ELB（エラスティックロードバランサー）の背後にあるAuto Scaling Group内の各AZに2つのEC2（Elastic Compute Cloud）インスタンスを持つ3つのAZにまたがってデプロイされたWeb層ELBの背後にあるAuto Scaling Groupと、他の2つのAZにリードレプリカを配置した1つのRDS（Relational Database Service）インスタンス。
B. ELB（エラスティックロードバランサ）の背後にあるAuto Scalingグループ内の各AZに3つのEC2（Elastic Compute Cloud）インスタンスを持つ2つのAZにまたがってデプロイされたWeb層、および各AZに3つのEC2インスタンスを持つ2つのAZにまたがってデプロイされるアプリケーション層ELBの背後にあるAuto Scaling Group内、および他のAZにリードレプリカを配置した1つのRDS（Relational Database Service）インスタンス。
C. ELB（エラスティックロードバランサ）の背後にあるAuto Scalingグループ内の各AZに3つのEC2（Elastic Compute Cloud）インスタンスを持つ2つのAZにまたがってデプロイされたWeb層ELSおよびMulti-AZ RDS（リレーショナルデータベースサービス）展開の背後にあるAuto Scalingグループ。
D. ELB（エラスティックロードバランサ）の背後にあるAuto Scalingグループ内の各AZに2つのEC2（Elastic Compute Cloud）インスタンスを持つ3つのAZにまたがってデプロイされたWeb層。また、1つのアプリケーション層が3つのAZにまたがって配置され、ELBおよびマルチAZ RDS（リレーショナルデータベースサービス）配置の背後にあるAuto Scalingグループ内の各AZに2つのEC2インスタンスが配置されました。
Answer: D
Explanation:
Explanation
Amazon RDS Multi-AZ Deployments
Amazon RDS Multi-AZ deployments provide enhanced availability and durability for Database (DB) Instances, making them a natural fit for production database workloads. When you provision a Multi-AZ DB Instance, Amazon RDS automatically creates a primary DB Instance and synchronously replicates the data to a standby instance in a different Availability Zone (AZ). Each AZ runs on its own physically distinct, independent infrastructure, and is engineered to be highly reliable. In case of an infrastructure failure (for example, instance hardware failure, storage failure, or network disruption), Amazon RDS performs an automatic failover to the standby, so that you can resume database operations as soon as the failover is complete. Since the endpoint for your DB Instance remains the same after a failover, your application can resume database operation without the need for manual administrative intervention.
Enhanced Durability
Multi-AZ deployments for the MySQL, Oracle, and PostgreSQL engines utilize synchronous physical replication to keep data on the standby up-to-date with the primary. Multi-AZ deployments for the SQL Server engine use synchronous logical replication to achieve the same result, employing SQL Server-native Mirroring technology. Both approaches safeguard your data in the event of a DB Instance failure or loss of an Availability Zone.
If a storage volume on your primary fails in a Multi-AZ deployment, Amazon RDS automatically initiates a failover to the up-to-date standby. Compare this to a Single-AZ deployment: in case of a Single-AZ database failure, a user-initiated point-in-time-restore operation will be required. This operation can take several hours to complete, and any data updates that occurred after the latest restorable time (typically within the last five minutes) will not be available.
Amazon Aurora employs a highly durable, SSD-backed virtualized storage layer purpose-built for database workloads. Amazon Aurora automatically replicates your volume six ways, across three Availability Zones.
Amazon Aurora storage is fault-tolerant, transparently handling the loss of up to two copies of data without affecting database write availability and up to three copies without affecting read availability. Amazon Aurora storage is also self-healing. Data blocks and disks are continuously scanned for errors and replaced automatically.
Increased Availability
You also benefit from enhanced database availability when running Multi-AZ deployments. If an Availability Zone failure or DB Instance failure occurs, your availability impact is limited to the time automatic failover takes to complete: typically under one minute for Amazon Aurora and one to two minutes for other database engines (see the RDS FAQ for details).
The availability benefits of Multi-AZ deployments also extend to planned maintenance and backups. In the case of system upgrades like OS patching or DB Instance scaling, these operations are applied first on the standby, prior to the automatic failover. As a result, your availability impact is, again, only the time required for automatic failover to complete.
Unlike Single-AZ deployments, I/O activity is not suspended on your primary during backup for Multi-AZ deployments for the MySQL, Oracle, and PostgreSQL engines, because the backup is taken from the standby.
However, note that you may still experience elevated latencies for a few minutes during backups for Multi-AZ deployments.
On instance failure in Amazon Aurora deployments, Amazon RDS uses RDS Multi-AZ technology to automate failover to one of up to 15 Amazon Aurora Replicas you have created in any of three Availability Zones. If no Amazon Aurora Replicas have been provisioned, in the case of a failure, Amazon RDS will attempt to create a new Amazon Aurora DB instance for you automatically.
NEW QUESTION: 2
SIMULATION
Fill in the blank. In Load Sharing Unicast mode, the internal cluster IP address is 10.4.8.3. The internal interfaces on two members are 10.4.8.1 and 10.4.8.2. Internal host 10.4.8.108 Pings 10.4.8.3, and receives replies. The following is the ARP table from the internal Windows host 10.4.8.108.
Review the exhibit and type the IP address of the member serving as the pivot machine in the space below.
Answer:
Explanation:
10.4.8.2
NEW QUESTION: 3
What three artifacts are created as a result of running the JeOS tool?
A. a tar.gz file with all of the images, README and vm.cfg files compressed
B. a vm.cfg file pointing to the created images, along with specified memory and CPU information
C. optional image files as specified in the command
D. a README file with product name, version number and build timestamp
E. a System.img file representing the operating system
Answer: A,B,E
NEW QUESTION: 4
Which of the following would an IS auditor consider the MOST relevant to short-term planning for an IS department?
A. Keeping current with technology advances
B. Conducting control self-assessment
C. Allocating resources
D. Evaluating hardware needs
Answer: C
Explanation:
The IS department should specifically consider the manner in which resources are allocated in the short term. Investments in IT need to be aligned with top management strategies, rather than focusing on technology for technology's sake. Conducting control self-assessments and evaluating hardware needs are not as critical as allocating resources during short-term planning for the IS department.