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A few top listed companies are
Google (USA)
Microsoft (USA)
Alibaba (China)
AWS (USA)
OVH ( France)
Huawei ( China)
Rackspace ( USA)
CenturyLink( USA)
DXC ( USA)
Atos ( France)
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Yes, we can use our existing AMIs in the AWS VPC in the same registered zone.
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This AWS VPC provides the given below features:
IPv4 and IPv6 address book.
Internet connectivity.
Subnet creation.
Route tables.
Elastic IP addresses.
Network/ Subnet security.
Additional networking services.
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The foremost element in Amazon VPC architecture is VPC network itself. It’s a logically separated part of AWS cloud. It’s possible to define your Virtual Private Cloud’s IP address from the range you’ve chosen. The second element is the Internet Gateway which is the connecting point between your VPC and the public internet. Subnets are the functional parts of your private cloud’s IP address range.
NAT Gateways are used to connect between instances of your private subnet with internet or other AWS services. Customer Gateways are your side of a VPN connection in AWS while Virtual Private Gateways are Amazon VPC side of VPN connection. This type of questions lies under the general or basic AWS VPC interview questions. Whether you are a fresher or have some experience, you may come across such questions so get prepared with the answer.
Element Brief description
Virtual Private Cloud (VPC) A logically isolated virtual network in the AWS cloud. You define a VPC’s IP address space from a range you select.
Subnet A segment of a VPC’s IP address range where you can place groups of isolated resources.
Internet Gateway The Amazon VPC side of a connection to the public Internet.
NAT Gateway A highly available, managed Network Address Translation (NAT) service for your resources in a private subnet to access the Internet.
Hardware VPN Connection A hardware-based VPN connection between your Amazon VPC and your datacenter, home network, or co-location facility.
Virtual Private Gateway The Amazon VPC side of a VPN connection. The Customer gateway is the customer side of a VPN connection.
Peering Connection A peering connection enables you to route traffic via private IP addresses between two peered VPCs
VPC Endpoint Enables Amazon S3 access from within your VPC without using an Internet gateway or NAT, and allows you to control the access using VPC endpoint policies.
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Cloud computing is based on Virtual Private Cloud ( VPC). This is the basic foundation of the AWS platform. Any of the advanced services of AWS can not be accessed without a VPC network. You will get a logically isolated section dedicated to a virtual network platform. Through this cloud, businesses can access customer details and data in a single window. It provides innovative new business approaches.
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If we want to build up our custom VPC, please follow the given below steps:
First, we need to create a virtual private cloud.
After that need to create subnets.
Now need to create an internet gateway.
Need to attach internet gateway with VPC.
Need to create a routing table.
Now add that created gateway in the new route table.
Do subnet association with the routing table.
Need to create a database server for the private subnet and a web server for the public subnet.
Need to create a new secured group of NAT.
Need to add HTTP and HTTPS inbound rules to allow traffic from private subnet IP.
Need to create elastic IP.
Tag this elastic IP with NAT.
Now deactivate the check for NAT.
Need to add this NAT in the base route table initially.
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There are a few advantages, they are:
Provide a complete process to build a virtual network.
No need for hardware, any physical data center, or VPN.
Full power access with control over your network.
EC2 instance is available to connect to the internet.
Can do enhanced security level in VPC with EC 2 instances.
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One data center can connect hardware VPN with AWS VPC. AWS supports internet protocol security VPN connections only. The encrypted data will be transferred. VPN connection helps in data security while transiting. No internet gateway is required to establish a hardware VPN connection with AWS VPC.