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:checkered_flag: VPC IN AWS :checkered_flag: - Coggle Diagram
:checkered_flag: VPC IN AWS :checkered_flag:
WHAT IS VPC
:star: a service that lets you launch AWS resources in a logically isolated virtual network that you define.
:star: user can use both IPv4 and IPv6 for most resources in user virtual private cloud and helping to ensure secure and easy access to resources and applications.
:star: VPC is Virtual Private Cloud in AWS.
DESCRIBE CIDR BLOCKS
a) Secondary CIDR blocks
:check: Similar to the primary CIDR block, secondary CIDR blocks are also supported by all the AWS services including Elastic Load Balancing and NAT Gateway.
:check: This feature has two key benefits.
i. First, customers, who are launching more and more resources in their VPCs, can now scale up their VPCs on-demand.
ii. Second, customers no longer have to over-allocate private IPv4 space to their VPCs - they can allocate only what is required at the time, and later expand it as needed.
b) IPv6 CICR blocks
:check: CIDR notation is a standard syntax for writing IPv6 addresses with a routing prefix.
:check: It consists of an IPv6 address, a slash, then a number of bits to measure the routing prefix.
EXPLAIN ELASTIC NETWORK INTERFACE IN VPC
a) Primary and secondary private IP address
:pencil2: One or more secondary private IPv4 addresses from the IPv4 address range of user VPC.
:pencil2: A primary private IPv4 address from the IPv4 address range of user VPC.
:pencil2: One Elastic IP address (IPv4) per private IPv4 address.
b) Attaching elastic network interface
:pencil2: user can attach a network interface to any of stopped or running instances, using either the Instances or Network Interfaces pages of the Amazon EC2 console.
EXPLAIN PUBLIC AND ELASTIC IP ADDRESS
a) Public IP address
:tada: It is assigned to user launched instance.
:tada: when an instance is terminated the public IP attached to it gets released and further when user relaunch the same instance new IP address is assigned.
b) Elasfic IP address
:tada: It is assigned to user AWS account.
:tada: Elastic IP do not change and they remain same even if user terminate the instance and later again restart the same instance.
