Using User Data Scripts to Configure EC2 Instances at Launch – AWS Security Fundamentals – SCS-C02 Study Guide

Using User Data Scripts to Configure EC2 Instances at Launch Although you can launch EC2 instances and then go and configure the software packages that you need on them manually, there are more efficient approaches. Following manual steps can lead to human mistakes and is a much more time-consuming process that can otherwise easily be […]

Global Accelerator Architecture – Network Design – ANS-C01 Study Guide

Global Accelerator Architecture The Anycast IP addresses are injected into the Internet’s BGP tables to advertise each public interface into the AWS network. The same IP address is advertised for each edge location to allow traffic to enter the network at its closest entry point from the user by using BGP reachability metrics. This reduces […]

Leveraging Access Delegation – Determining an Authentication and Access Control Strategy for Complex Organizations – SAP-C02 Study Guide

Leveraging Access Delegation You are now going to investigate access delegation. Access delegation is essentially used for the following reasons: Now, start by examining these cases. Temporary Access Delegation Take for instance, the first use case where you need to provide trusted users, applications, or AWS services with temporary security credentials so that they can […]

Sticky Connections – Network Design – ANS-C01 Study Guide

Sticky Connections Sticky connections bind a user’s connections though the ELB to a specific target for the duration of the connection. All connections from the user for the session will always be directed to the same backend target. Some applications maintain state information at the server level such as checkout carts or other session tracking […]

Overfitting and underfitting – Machine Learning Fundamentals – MLS-C01 Study Guide

Overfitting and underfitting ML models might suffer from two types of fitting issues: overfitting and underfitting. Overfitting means that your model performs very well on the training data but cannot be generalized to other datasets, such as testing and, even worse, production data. In other words, if you have an overfitted model, it only works […]

Global Accelerator – Network Design – ANS-C01 Study Guide

Global Accelerator When accessing AWS resources over the Internet, traffic is routed from your local connection over the Internet to the region requested over many hops and, often, across many different Internet providers and backbone carriers. This can cause additional latency and suboptimal performance. The AWS Global Accelerator service can greatly improve network performance by […]

Limitations – Determining an Authentication and Access Control Strategy for Complex Organizations – SAP-C02 Study Guide

Limitations AD Connector is not compatible with Amazon RDS for SQL Server or with Amazon FSx for Windows File Server. When to Use It AD Connector is recommended when you want to use your existing on-premises directory with compatible AWS services. Managed Microsoft AD Managed Microsoft AD essentially lets you run Microsoft AD as a […]

Load Balancer Architectures – Network Design – ANS-C01 Study Guide

Load Balancer Architectures ELB architectures include Internet-facing or internal configurations. When assigned a public IP address and configured to be reachable from the Internet, an AWS Elastic Load Balancer instance can service public connections by acting as a front end to the backend services that can be inaccessible to the public and be in a […]

Shuffling your training set – Machine Learning Fundamentals – MLS-C01 Study Guide

Shuffling your training set Now that you know what variance and data splitting are, you can go a little deeper into the training dataset requirements. You are very likely to find questions around data shuffling in the exam. This process consists of randomizing your training dataset before you start using it to fit an algorithm. […]

End-User Applications Services – Introduction to AWS – SOA-C02 Study Guide

End-User Applications Services Within the scope of foundation services, AWS also bundles end-user applications; they include the ability to provide users with everything required to perform their work including but not limited to  Amazon WorkMail: An enterprise email and calendar service that seamlessly integrates with almost any email client.  Amazon WorkDocs: A document editor and […]