Book Image

AWS Certified Developer - Associate Guide

By : Vipul Tankariya, Bhavin Parmar
Book Image

AWS Certified Developer - Associate Guide

By: Vipul Tankariya, Bhavin Parmar

Overview of this book

AWS Certified Developer - Associate Guide starts with a quick introduction to AWS and the prerequisites to get you started. Then, this book gives you a fair understanding of core AWS services and basic architecture. Next, this book will describe about getting familiar with Identity and Access Management (IAM) along with Virtual private cloud (VPC). Moving ahead you will learn about Elastic Compute cloud (EC2) and handling application traffic with Elastic Load Balancing (ELB). Going ahead you we will talk about Monitoring with CloudWatch, Simple storage service (S3) and Glacier and CloudFront along with other AWS storage options. Next we will take you through AWS DynamoDB – A NoSQL Database Service, Amazon Simple Queue Service (SQS) and CloudFormation Overview. Finally, this book covers understanding Elastic Beanstalk and overview of AWS lambda. At the end of this book, we will cover enough topics, tips and tricks along with mock tests for you to be able to pass the AWS Certified Developer - Associate exam and develop as well as manage your applications on the AWS platform.
Table of Contents (29 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface
Index

DHCP option sets


DHCP is a network protocol that dynamically assigns IP addresses to instances in a VPC from the respective subnet's CIDR block. It also passes configuration information such as domain name, Domain Name Server (DNS), NTP server, and so on. This configuration information is called a DHCP option set. A DHCP option set is essential for any newly created EC2 instance in a VPC. Every VPC has one DHCP option set. When creating a custom VPC, it automatically associates a default DHCP option set for the VPC. Once the DHCP option set is created, its parameters cannot be modified. You need to create new DHCP option set and associate it with the VPC. If you do not want to automatically assign configuration to a VPC, no DHCP option set can also be configured. As soon as the DHCP option set changes for any VPC, existing and new EC2 instances start using new DHCP option sets. Changing the DHCP option set does not require restarting EC2 instances. A DHCP option set allows configuring of...