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This lesson will cover the fundamentals of the Domain Name System (DNS), including key record types like A, AAAA, CNAME, and the special Route 53 Alias record. We will then explore Amazon Route 53's core functions, focusing on Public Hosted Zones for DNS management. The main part of the lesson will be a deep dive into the various routing policies available in Route 53: Simple, Weighted (for load balancing/testing), Latency-based (for performance), Failover (for disaster recovery), and Geolocation (for content localization). Each policy will be explained with a practical use case relevant to a solutions architect.
This lesson introduces the core concepts of AWS EC2, focusing on the fundamental decisions required to provision a virtual server. We will start by defining an EC2 instance, an Amazon Machine Image (AMI) as a template, and the various instance type families (e.g., General Purpose, Compute Optimized) to match hardware to workload needs. A significant portion will be dedicated to a practical comparison of the primary EC2 pricing models: On-Demand for flexibility, Reserved Instances for cost savings on predictable workloads, and Spot Instances for fault-tolerant, cost-sensitive tasks. The lesson concludes by contrasting the two main storage options: persistent, network-attached Elastic Block Store (EBS) volumes versus ephemeral, high-performance, physically-attached Instance Store volumes.
This lesson covers the foundational pillars of a high-performing AWS architecture. We will start with selecting the optimal compute resources, focusing on EC2 instance types and how they map to specific workloads like data processing or AI model serving. We will then implement horizontal scalability using Auto Scaling Groups, configuring policies to automatically adjust capacity based on demand. The second half of the lesson focuses on distributing incoming traffic efficiently using Elastic Load Balancing, with a specific focus on the Application Load Balancer (ALB) for modern web applications. We will conclude with a brief overview of S3 performance optimization techniques, such as Transfer Acceleration.
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