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REMOTE ACCESS SOLUTION IN WINDOWS SERVER ENVIRONMENT - Coggle Diagram
REMOTE ACCESS SOLUTION IN WINDOWS SERVER ENVIRONMENT
1) WHAT IS VPC (virtual private cloud in AWS)
Amazon Virtual Private Cloud is a service that lets you launch AWS resources in a logically isolated virtual network that you define.
can use both IPv4 and IPv6 for most resources in virtual private cloud, helping to ensure secure and easy access to resources and applications.
Amazon VPC enables to build a virtual network in the AWS cloud
no VPNs, hardware, or physical datacenters required.
You can define your own network space, and control how your network and the Amazon EC2 resources inside your network are exposed to the Internet.
2) DESCRIBE CIDR BLOCKS
i. SECONDARY CIDR BLOCKS
Similar to the primary CIDR block
secondary CIDR blocks are also supported by all the AWS services including Elastic Load Balancing and NAT Gateway.
This feature has two key benefits. First, customers, who are launching more and more resources in their VPCs, can now scale up their VPCs on-demand.
ii. IPV6 CIDR BLOCKS
The interface identifier has a fixed size of 64 bits by convention, and smaller subnets are never allocated to end users.
how many blocks are in ipv6 ?
There are now 8 blocks rather than 4, and rather than each block being 1 byte (which were represented as a number from 0-255), each block is instead 2 bytes represented by 4 hexadecimal characters.
IPv6 pool can be assigned to the machines and devices used to access the Internet.
Some IP addresses have been reserved for other uses, such as for use in private networks. This means that the total number of IP addresses available for allocation is less than the total number in the pool.
3) EXPLAIN ELASTIC NETWORK INTERFACES IN VPC
PRIMARY & SECONDARY PRIVATE IP ADDRESSES
1. PRIMARY PRIVATE IP ADDRESS
Can associate a custom IP address to your Amazon EC2 instance while you configure the instance prior to launch.
The IP address must be a valid IPv4 address, In the CIDR range of the chosen subnet & Available. The IP address must not be tied to any other resource
2. SECONDARY PRIVATE IP ADDRESS
can assign a secondary private IP address to an Amazon EC2 instance when you launch the instance.
If already launched the EC2 instance, can assign a secondary private IP address to the network interface.
4) EXPLAIN PUBLIC & ELASTIC IP ADDRESSES
i. ELASTIC IP ADDRESSES
Elastic IP do not change and they remain same even if you terminate the instance and later again restart the same instance.
An Elastic IP address is a public IPv4 address , which is reachable from the internet.
If your instance does not have a public IPv4 address, you can associate an Elastic IP address with your instance to enable communication with the internet.
ii. PUBLIC IP ADDRESSES
when an instance is terminated the public IP attached to it gets released and further when you relaunch the same instance new IP address is assigned.
IPv6 addresses are public.
A public IP address is an IP address that is used to access the Internet. Public IP addresses can be routed on the Internet, unlike private addresses.