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Decoupling applications : can scale independently from our application ​ SQS - Umlimited throughput, Unlimited number of messages in queue - Default retention of messages : 4 days(max14 days) - Limitation of 256kb per message sent - Producing messages : Using SDK - Consuming Messages : Poll SQS for messages (receive up to 10 messages at a time) > Process the messages > Delete the messages - Encr..

요약 ** VPC는 Region에 여러개 설정할 수 있으며 여러 AZ에 걸쳐서 설정할 수 있다 ** Private Subnet을 외부 인터넷으로 연결하기 위해서는 Bation Hosts/NAT Instance/NAT Gateway를 Public subnet에 설정하고 라우팅테이블을 통해 이들을 Internet Gateway로 연결해주어야함. Bation Hosts/NAT Instance는 인스턴스를 통한 외부연결이기 때문에 Security Group 설정이 필요함. NAT Gateway는 Security Group 설정이 필요없으며 AWS에 의해 관리되고 HA를 지원함. ** Private Subnet을 인터넷을 통하지 않고 AWS서비스에 연결하기 위해서는 Interface Endpoint / Gatew..

Public IP : machine can be identified in WWW, must be unique across the whole web vs Private IP : machine can only be identified on a private network, must be unique across the private network vs Elastic IP : fixed public IP for instnace ​ Placement Groups​ : control over the EC2 instance placement strategy - Cluster : clusters instances into a low-latency group in a single AZ Pros : Great netwo..