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AWS Certified Developer ??? Associate Guide

You're reading from   AWS Certified Developer ??? Associate Guide Your one-stop solution to passing the AWS developer's certification

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787125629
Length 600 pages
Edition 1st Edition
Tools
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Authors (2):
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Bhavin Parmar Bhavin Parmar
Author Profile Icon Bhavin Parmar
Bhavin Parmar
Vipul Tankariya Vipul Tankariya
Author Profile Icon Vipul Tankariya
Vipul Tankariya
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Toc

Table of Contents (19) Chapters Close

Preface 1. AWS Certified Developer – Associate Certification FREE CHAPTER 2. Introduction to Cloud Computing and AWS 3. Identity and Access Management 4. Virtual Private Clouds 5. Getting Started with Elastic Compute Cloud 6. Handling Application Traffic with Elastic Load Balancing 7. Monitoring with CloudWatch 8. Simple Storage Service, Glacier, and CloudFront 9. Other AWS Storage Options 10. AWS Relational Database Services 11. AWS DynamoDB - A NoSQL Database Service 12. Amazon Simple Queue Service 13. Simple Notification Service 14. Simple Workflow Service 15. AWS CloudFormation 16. Elastic Beanstalk 17. Overview of AWS Lambda 18. Mock Tests

Introduction to the Elastic Load Balancer

An Elastic Load Balancer (ELB) is an AWS service that automatically distributes incoming network or application traffic to a number of EC2 instances. It monitors the health of each of the EC2 instances associated with it and forwards traffic only to healthy instances. An ELB  provides a single point of contact for the EC2 instances behind the ELB. Each of the EC2 instances is marked with a status, either InService if it is healthy, or OutOfService if it is unhealthy. Traffic is routed only to InService instances. An ELB provides a single point of contact for the application traffic that is hosted on multiple EC2 instances. By routing traffic only to healthy instances, an ELB provides fault tolerance to the application and ensures high availability of the application:

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