AWS Certified Architect: Associate

DNS 101 DNS is used to convert human friendly domain names into an Internet Protocol (IP) address (such as 82.124.53.1). IP addresses are used by computers to identify each other in a network. IP addresses commonly come in 2 different forms, IPv4 and IPv6. Top level domains are controlled by the Internet Assigned Numbers Authority (IANA) in a root zone database which is essentially a database of all available top level domains. Domain Registrars Because all of the names in a given domain name have to be unique there needs to be a way to organize this all so that domain names aren't duplicated. This is where domain registrars come in. A registrar is an authority that can assign domain names directly under one or more top-level domains. These domains are registered with InterNIC, a service of ICANN, which enforces uniqueness of domain names across the Internet. Each domain name becomes registered in a central database known as WhoIS database. SOA Records The SOA (Start of

Simple Queue Service (SQS) Amazon SQS is a web service that gives you access to a message queue that can be used to store messages while waiting for a computer to process them. Amazon SQS is a distributed queue service that enables web service applications to quickly and reliably queue messages that one component in the application generates and another consumes. A queue is a temporary repository for messages that are awaiting processing. Messages can contain up to 256KB of text in any format. There are two types of queues: Standard queues (default): Lets you have nearly unlimited number of transactions per second. Standard queues guarantee that a message is delivered at least once. However, occasionally (because of the highly distributed architecture that allows high throughput), more than once copy of a message might be delivered out of order. Standard queues provide best-effort ordering which ensures that messages are generally delivered in the same order as they are sent.

Virtual Private Cloud (VPC) Think of a VPC as a virtual center in the cloud.When you setup your AWS account you get a default VPC but there are cases where is not what you need. VPC (AWS Definition) : Amazon VPC lets you provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you define. You have complete control over your virtual networking environment, including selection of your own IP address range, creation of subnets, and configuration of route tables and network gateways. You can easily customize the network configuration for your Amazon Virtual Private Cloud. For example, you can create, you can create you own public facing subnet containing your webservers that have access to the Internet, and place you backend systems such as databases and application servers in private-facing subnet with no Internet access. You can leverage multiple layers of security, including security groups and network access control list