High Availability with Elastic Load Balancers and Route 53 This section covers the following official AWS Certified SysOps Administrator – Associate (SOA-C02) exam domains: Domain 2: Reliability and Business Continuity Domain 5: Networking and Content Delivery CramSaver If you can correctly answer these questions before going through this section, save time by skimming the Exam […]

Setting Up Notifications The last piece of the puzzle is enabling and configuring notifications for your billing alerts and alarms. This is important for a number of reasons, such as cost management, security, and creating automated workflows. This can also be achieved with a few simple clicks from the AWS Management Console: That’s pretty much […]

Dealing with numerical features In terms of numerical features (discrete and continuous), you can think of transformations that rely on the training data and others that rely purely on the (individual) observation being transformed. Those who rely on the training data will use the training set to learn the necessary parameters during fit, and then […]

Further Reading For additional information on and a more comprehensive foundation to AWS security, please look at the following resources: Exam Readiness Drill – Chapter Review Questions Apart from a solid understanding of key concepts, being able to think quickly under time pressure is a skill that will help you ace your certification exam. That […]

Exam Essentials Know the DNS resolution steps. Understand the resolution steps that DNS takes to resolve a URL that a user types in a browser to resolve the DNS name to an IP address. Know what a zone is. A zone is a subset of your domain records that contains your DNS records such as […]

Private Subnets A private subnet within a VPC has no access to or from the Internet; however, it is by default accessible and can access all other private and public subnets in the VPC because the default routing in the VPC targets the entire VPC CIDR range. You can connect private subnets via VPN or […]

Monitoring with Alerts, Notifications, and Reports Now you have selected the necessary tags and enforced a tagging strategy for your workloads on AWS. In this section, you will now look at how to use these tagging mechanisms to generate simple billing alerts, notifications, and reports using AWS tools and services. First, you will learn how […]

Applying binary encoding For those types of variables with a higher number of unique categories, a potential approach to creating a numerical representation for them is applying binary encoding. In this approach, the goal is transforming a categorical variable into multiple binary columns, but minimizing the number of new columns. This process consists of three […]

Using Automation as a Response to Incident Response AWS has several tools that allow you to automate security responses with human intervention and without it. As you saw in the previous example, using Systems Manager Incident Manager and predefined runbooks allows a team member on the contact list to execute predetermined steps and procedures. Other […]

Privacy Protection You can elect to hide your WHOIS information from the public so when a WHOIS query is made, the registrar information (Amazon Web Services) is returned and not your personal data. If you do not hide your personal data, you will most likely get a fair amount of spam in your inbox. WHOIS […]