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NEW QUESTION: 1
In which section of the transformation file do you define the source InfoObject?
Please choose the correct answer.
Response:
A. Mapping
B. Options
C. Conversion
D. Selection
Answer: A
NEW QUESTION: 2
DRAG DROP
Match each port number with its appropriate protocol name.
Answer:
Explanation:
DNS - 53
DHCP - 68
LDAP - 389
FTPS - 989
SSH - 22
NEW QUESTION: 3
ドメインname.example.comの複数のAWSリージョンにまたがるグローバルなオーディエンスをターゲットとするウェブアプリケーションをデプロイしました。 Route53 Latency-Based Routingを使用して、ユーザーに最も近い地域からユーザーにWeb要求を処理することにしました。サーバーのダウンタイムが発生した場合にビジネス継続性を提供するには、地域ごとに別々のアベイラビリティーゾーンにある2つのWebサーバーに関連付けられた加重レコードセットを設定します。
DRテストを実行すると、いずれかの地域のすべてのWebサーバーを無効にすると、Route53がすべてのユーザーを他の地域に自動的に誘導しないことに気付きます。
何が起きているのでしょうか？ （2つの答えを選択してください）
A. サーバーを無効にした地域のサンプルcomに関連付けられたレイテンシエイリアスリソースレコードセットで[ターゲットの状態を評価]を[はい]に設定しませんでした。
B. 他の地域の2つの稼働中のWebサーバーの1つがHTTPヘルスチェックに合格しませんでした。
C. 無効化されたWebサーバーに関連付けられた1つ以上の加重リソースレコードセットにHTTPヘルスチェックを設定しませんでした。
D. 遅延リソースレコードセットは、加重リソースレコードセットと組み合わせて使用できません。
E. サーバーが無効になっている地域のレイテンシエイリアスリソースレコードセットに関連付けられている重みの値は、他の地域の重みよりも高くなっています。
Answer: A,C
Explanation:
Explanation
How Health Checks Work in Complex Amazon Route 53 Configurations
Checking the health of resources in complex configurations works much the same way as in simple configurations. However, in complex configurations, you use a combination of alias resource record sets (including weighted alias, latency alias, and failover alias) and nonalias resource record sets to build a decision tree that gives you greater control over how Amazon Route 53 responds to requests. For more information, see How Health Checks Work in Simple Amazon Route 53 Configurations.
For example, you might use latency alias resource record sets to select a region close to a user and use weighted resource record sets for two or more resources within each region to protect against the failure of a single endpoint or an Availability Zone. The following diagram shows this configuration.
Here's how Amazon EC2 and Amazon Route 53 are configured:
You have Amazon EC2 instances in two regions, us-east-1 and ap-southeast-2. You want Amazon Route 53 to respond to queries by using the resource record sets in the region that provides the lowest latency for your customers, so you create a latency alias resource record set for each region. (You create the latency alias resource record sets after you create resource record sets for the individual Amazon EC2 instances.) Within each region, you have two Amazon EC2 instances. You create a weighted resource record set for each instance. The name and the type are the same for both of the weighted resource record sets in each region.
When you have multiple resources in a region, you can create weighted or failover resource record sets for your resources. You can also create even more complex configurations by creating weighted alias or failover alias resource record sets that, in turn, refer to multiple resources.
Each weighted resource record set has an associated health check. The IP address for each health check matches the IP address for the corresponding resource record set. This isn't required, but it's the most common configuration.
For both latency alias resource record sets, you set the value of Evaluate Target Health to Yes.
You use the Evaluate Target Health setting for each latency alias resource record set to make Amazon Route 53 evaluate the health of the alias targets-the weighted resource record sets-and respond accordingly.
The preceding diagram illustrates the following sequence of events:
Amazon Route 53 receives a query for example.com. Based on the latency for the user making the request, Amazon Route 53 selects the latency alias resource record set for the us-east-1 region.
Amazon Route 53 selects a weighted resource record set based on weight. Evaluate Target Health is Yes for the latency alias resource record set, so Amazon Route 53 checks the health of the selected weighted resource record set.
The health check failed, so Amazon Route 53 chooses another weighted resource record set based on weight and checks its health. That resource record set also is unhealthy.
Amazon Route 53 backs out of that branch of the tree, looks for the latency alias resource record set with the next-best latency, and chooses the resource record set for ap-southeast-2.
Amazon Route 53 again selects a resource record set based on weight, and then checks the health of the selected resource record set. The health check passed, so Amazon Route 53 returns the applicable value in response to the query.
What Happens When You Associate a Health Check with an Alias Resource Record Set?
You can associate a health check with an alias resource record set instead of or in addition to setting the value of Evaluate Target Health to Yes. However, it's generally more useful if Amazon Route 53 responds to queries based on the health of the underlying resources-the HTTP servers, database servers, and other resources that your alias resource record sets refer to. For example, suppose the following configuration:
You assign a health check to a latency alias resource record set for which the alias target is a group of weighted resource record sets.
You set the value of Evaluate Target Health to Yes for the latency alias resource record set.
In this configuration, both of the following must be true before Amazon Route 53 will return the applicable value for a weighted resource record set:
The health check associated with the latency alias resource record set must pass.
At least one weighted resource record set must be considered healthy, either because it's associated with a health check that passes or because it's not associated with a health check. In the latter case, Amazon Route 53 always considers the weighted resource record set healthy.
If the health check for the latency alias resource record set fails, Amazon Route 53 stops responding to queries using any of the weighted resource record sets in the alias target, even if they're all healthy. Amazon Route 53 doesn't know the status of the weighted resource record sets because it never looks past the failed health check on the alias resource record set.
What Happens When You Omit Health Checks?
In a complex configuration, it's important to associate health checks with all of the non-alias resource record sets. Let's return to the preceding example, but assume that a health check is missing on one of the weighted resource record sets in the us-east-1 region:
Here's what happens when you omit a health check on a non-alias resource record set in this configuration:
Amazon Route 53 receives a query for example.com. Based on the latency for the user making the request, Amazon Route 53 selects the latency alias resource record set for the us-east-1 region.
Amazon Route 53 looks up the alias target for the latency alias resource record set, and checks the status of the corresponding health checks. The health check for one weighted resource record set failed, so that resource record set is omitted from consideration.
The other weighted resource record set in the alias target for the us-east-1 region has no health check. The corresponding resource might or might not be healthy, but without a health check, Amazon Route 53 has no way to know. Amazon Route 53 assumes that the resource is healthy and returns the applicable value in response to the query.
What Happens When You Set Evaluate Target Health to No?
In general, you also want to set Evaluate Target Health to Yes for all of the alias resource record sets. In the following example, all of the weighted resource record sets have associated health checks, but Evaluate Target Health is set to No for the latency alias resource record set for the us-east-1 region:
Here's what happens when you set Evaluate Target Health to No for an alias resource record set in this configuration:
Amazon Route 53 receives a query for example.com. Based on the latency for the user making the request, Amazon Route 53 selects the latency alias resource record set for the us-east-1 region.
Amazon Route 53 determines what the alias target is for the latency alias resource record set, and checks the corresponding health checks. They're both failing.
Because the value of Evaluate Target Health is No for the latency alias resource record set for the us-east-1 region, Amazon Route 53 must choose one resource record set in this branch instead of backing out of the branch and looking for a healthy resource record set in the ap-southeast-2 region.