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NEW QUESTION: 1
경매 웹 사이트를 통해 사용자는 수집 가능한 품목에 입찰 할 수 있습니다. 경매 규칙에 따르면 각 입찰은 한 번만 접수 된 순서대로 처리되어야 합니다. 현재 구현은 Amazon Kinesis Data Streams에 입찰 레코드를 쓰는 Amazon EC2 웹 서버를 기반으로 합니다. 단일 t2.large 인스턴스에는 Kinesis Data Streams에서 들어오는 입찰을 읽고 각 입찰을 처리하는 입찰 프로세서를 실행하는 cron 작업이 있습니다. 경매 사이트의 인기가 높아지고 있지만 사용자는 일부 입찰이 등록되지 않았다고 불평하고 있습니다.
문제 해결은 수요가 많은 시간 동안 입찰 프로세서가 너무 느려 처리 중 때때로 충돌하며 처리중인 레코드를 추적하지 못하는 경우가 있습니다.
입찰 처리의 안정성을 높이려면 어떤 변화가 있습니까?
A. EC2 인스턴스 유형을 t2.large에서 더 큰 일반 컴퓨팅 인스턴스 유형으로 전환하십시오. Kinesis Data Streams의 IncomingRecords 지표를 기반으로 입찰 프로세서를 실행하는 EC2 인스턴스 수를 확장하는 Auto Scaling 그룹에 입찰 프로세서 EC2 인스턴스를 배치합니다.
B. Kinesis Data Streams에 입찰을 게시 할 때 Amazon Kinesis Producer Library (KPL)를 사용하도록 웹 애플리케이션을 리팩터링하십시오. 입찰 프로세서를 리팩터링하여 Kinesis Data Streams의 각 레코드를 읽지 않고 처리하고 처리중인 것으로 플래그를 지정합니다. 각 입찰 처리 실행이 시작될 때 Kinesis Data Streams에서 처리되지 않은 레코드를 검색합니다.
C. 웹 애플리케이션을 리팩터링하여 각 수신 입찰을 Kinesis Data Streams 대신 Amazon SQS FIFO 대기열에 게시합니다. 지속적으로 SQS 대기열에 입찰 프로세서를 리팩터링하십시오. 최소 및 최대 크기가 1 인 Auto Scaling 그룹에 입찰 처리 EC2 인스턴스를 배치하십시오.
D. 웹 애플리케이션을 리팩터링하여 각 수신 입찰을 Kinesis Data Streams 대신 Amazon SNS 주제에 게시합니다. 사용자가 입찰을 제출하자마자 각 입찰을 처리하는 AWS Lambda 함수를 트리거하도록 SNS 주제를 구성하십시오.
Answer: A

NEW QUESTION: 2
VNet1という名前の仮想ネットワークに接続するVM1という名前のAzure仮想マシンがあります。 VM1には次の構成があります。
*サブネット：10.0.0.0/24
*可用性セット：AVSet
*ネットワークセキュリティグループ（NSG）：なし
*プライベートIPアドレス：10.0.0.4（動的）
*パブリックIPアドレス：40.90.219.6（動的）
slb1という名前の標準のインターネット向けロードバランサーをデプロイします。
VM1への接続を許可するには、slb1を構成する必要があります。
slb1を構成するときに、VM1にどの変更を適用する必要がありますか？回答するには、回答領域で適切なオプションを選択します。
注：それぞれの正しい選択は1ポイントの価値があります。

Answer:
Explanation:
Explanation
Box 1: Remove the public IP address from VM1
If the Public IP on VM1 is set to Dynamic, that means it is a Public IP with Basic SKU because Public IPs with Standard SKU have Static assignments by default, that cannot be changed. We cannot associate Basic SKUs IPs with Standard SKUs LBs. One cannot create a backend SLB pool if the VM to be associated has a Public IP. For Private IP it doesn't matter weather it is dynamic or static, still we can add the such VM into the SLB backend pool.
Box 2: Create and configure an NSG
Standard Load Balancer is built on the zero trust network security model at its core. Standard Load Balancer secure by default and is part of your virtual network. The virtual network is a private and isolated network.
This means Standard Load Balancers and Standard Public IP addresses are closed to inbound flows unless opened by Network Security Groups. NSGs are used to explicitly permit allowed traffic. If you do not have an NSG on a subnet or NIC of your virtual machine resource, traffic is not allowed to reach this resource. To learn more about NSGs and how to apply them for your scenario, see Network Security Groups. Basic Load Balancer is open to the internet by default.

Reference:
https://docs.microsoft.com/en-us/azure/load-balancer/quickstart-load-balancer-standard-public-portal
https://docs.microsoft.com/en-us/azure/load-balancer/load-balancer-overview

NEW QUESTION: 3
Which of the following phenomena does not exist in the analog network, but only in the digital wireless network?
A. Congestion
B. Fast decline
C. Intersymbol interference
D. Rayleigh decline
Answer: C