Signed URLs are one of the most powerful security features within Amazon CloudFront, providing granular access control to your distributed content. As you prepare for your AWS SysOps Administrator certification, understanding this functionality thoroughly will help you implement secure content delivery mechanisms. What are CloudFront Signed URLs? CloudFront Signed URLs…

Introduction Database performance monitoring is a critical aspect of maintaining optimal application performance and user experience. Amazon Relational Database Service (RDS) provides a powerful feature called Enhanced Monitoring that allows administrators to gain deeper visibility into the health and performance of their database instances. This blog post will explore Enhanced…

Introduction As AWS environments evolve, the need to migrate EC2 instances to different instance types is a common operational task. While migrating EBS-backed instances is relatively straightforward, migrating instance store-backed instances presents unique challenges due to their ephemeral storage characteristics. This guide provides a detailed walkthrough of the migration process…

📘 What Is S3 Intelligent-Tiering? Amazon S3 Intelligent-Tiering is a storage class designed for data with unknown or changing access patterns. It helps you optimize storage costs automatically by moving data between different tiers based on how frequently it’s accessed. 🎯 You don’t need to analyze or manage lifecycle rules…

📌 What Are S3 Storage Classes? Amazon S3 Storage Classes allow you to choose the most cost-effective storage option for your data — depending on how frequently you need to access it, how quickly, and your durability/availability requirements. ✅ Main idea:Balance cost, durability, availability, and retrieval time. 📖 Overview of…

📌 Why Access Control Matters in Amazon S3 Amazon S3 stores sensitive data — so controlling who can access what is critical. AWS offers three main access control mechanisms you need to know for the SysOps exam: Each method serves different purposes, with different levels of granularity and scope. 📖…

📌 What Is S3 Object Lock? Amazon S3 Object Lock is a feature that prevents objects from being deleted or overwritten for a fixed or indefinite amount of time. It’s designed to help you meet regulatory requirements (like WORM — Write Once, Read Many) and protect critical data. 📖 Object…

📌 Why Encrypt Data in Amazon S3? Although Amazon S3 provides secure storage, encryption adds another important layer of protection: In the AWS SysOps SOA-C02 exam, you’re often asked: 📖 Encryption Options in Amazon S3 When uploading data to S3, there are two encryption levels: 🛠 1️⃣ Server-side Encryption (SSE)…

🎯 Mục tiêu bài viết 🧠 1. Egress-Only Internet Gateway là gì? Egress-Only Internet Gateway (EOIGW) là cổng ra Internet dành riêng cho IPv6, cho phép các instance trong subnet IPv6 gửi lưu lượng ra ngoài, nhưng không nhận kết nối từ ngoài vào. Nói cách khác: 🛠 2. Khi…

📌 Mục tiêu: Hiểu VPC Flow Logs là gì, cách triển khai, cách phân tích, và những câu hỏi thường gặp trong bài thi SOA-C02. 🌐 1. VPC Flow Logs là gì? VPC Flow Logs cho phép bạn ghi lại thông tin về lưu lượng IP ra vào các network…