A Cloud Guru: AWS Cloud Certified Practitioner 2023 exam with well answered questions to pass!

Advantages of Cloud Computing 1. Trade Capital Expense for Variable Expense 2. Benefit from economies of scale 3. Stop guessing capacity 4. Increase agility 5. Stop spending money on maintaining data centers. 6. Go global in minutes Aurora Amazon Types of Cloud Computing - IaaS (Infrastructure-as-a-Service) - PaaS (Platform-as-a-Service) - SaaS (Software-as-a-Service) AWS Cloud Infrastructure 1. Regions 2. Availability Zones 3. Edge Locations Ways to Access AWS 1. Command Line 2. Console 3. SDK Root Account Original email account used to create AWS account. Has full access. Should have an MFA, and IAM roles should be made and used instead if possible. User Groups Created in IAM. Set permissions for multiple users. Contain user policies. User Policies JSON key value pairs that provide rules to what a user or group can do in AWS. S3 Simple Storage Service Simple Storage Service Fully redundant data storage for object-based storage. (Images, files, static web pages, etc.) Bucket A location to store objects in S3. Similar to a directory in computer. Each bucket has a globally unique name, and can be accessed globally. Glacier Similar to S3, but for long term storage. Cheaper, but requires larger files and takes 3-5 hours to retrieve files. S3 Security 1. Bucket Policies - Apply to a bucket. 2. Access Control Lists - Apply to individual objects. S3 Transfer Acceleration Uses edge locations to upload files. CloudFront Content-Delivery Network (CDN) service from AWS. Uses edge locations to cache files. CloudFront Origin The origin of all files that the CDN will distribute. Can be S3, EC2, ELB, or Route 53. Distribution 1. Web distribution - Collection of Edge locations used for Cloudfront websites. 2. RTMP - Specific Cloudfront edge locations used for streaming. CloudFront Cache Eventually correct. Older versions can be invalidated immediately, for a fee. EC2 Elastic Compute Cloud Elastic Compute Cloud Virtual Servers on the cloud. EC2 Pricing Models 1. On Demand 2. Spot 3. Reserved 4. Dedicated On Demand EC2 Charged as needed. Most expensive but most agile. Spot EC2 Bought by bid and only temporary. Cheapest but very few use cases. Reserved EC2 Paid all or partly ahead of time for 1 or 3 years. Cheapest besides spot. Most reliable. Dedicated EC2 Own specific serves in cloud. Expensive and obly used for corner cases. EBS Elastic Block Storage. Disk in the cloud. Block based. EBS Volumes 1. General Purpose SSD 2. Provisioned IOPS SSD 3. Throughput Optimized HDD 4. Cold Hard Disk HDD IAM Roles vs. Access Keys Roles are easier to manage and track then access keys. RDS Relational Database Service RDS Features 1. Multi AZ for disaster recovery 2. Read Replicas for performance DynamoDB Predictable and Scalable NoSQL Data Store