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Beginners who were trying AWS VPC interview questions for the first time used to get confused with this question, since these terms look similar.
Actually, VPS or Virtual Private Server is none other than the host server offered by web hosting companies like BlueHost and GoDaddy (These companies also provide shared hosting services wherein the server is shared by several users). Here, a single host divided to multiple virtual units, each having an independent function. Each of these units is virtual private servers which can work without depending on one another. You’ll get access to the complete physical server including root access.
In the case of VPC, its functions are similar to that of a VPS but its servers don’t have to place in a single location.
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If you want to connect Amazon EC2-classic instances to VPC, you have to use ClassicLink. This work only within the same region and this makes use of private IP addresses. Its working is simple- you just have to enable ClassicLink in your VPC account and associate a security group from VPC to EC2-classic instance.
This type of questions are the additions AWS VPC interview questions that you shouldn’t miss so prepare yourself with the answer.
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Amazon VPC lets you provision a logically isolated section of the Amazon Web Services (AWS) cloud where you can launch AWS resources in a virtual network that you define. You have complete control over your virtual networking environment, including selection of your own IP address range, creation of subnets, and configuration of route tables and network gateways. You can also create a hardware Virtual Private Network (VPN) connection between your corporate datacenter and your VPC and leverage the AWS cloud as an extension of your corporate datacenter.You can easily customize the network configuration for your Amazon VPC. For example, you can create a public-facing subnet for your web servers that have access to the Internet, and place your backend systems such as databases or application servers in a private-facing subnet with no Internet access. You can leverage multiple layers of security, including security groups and network access control lists, to help control access to Amazon EC2 instances in each subnet.
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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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An Internet Gateway is highly available, horizontally scaled VPC component. Gateways establish coherent connections between your Amazon VPC network and the internet. There can be only one gateway associated with each VPC. These are the VPC components that provide NAT (Network Address Translation) for instances which have already assigned public IP addresses. In the case of internet routable traffic, such a gateway provides a target in your VPC route tables.
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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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These VPC’s are existing in the AWS roundabout. This AWS around a geographic area. It can be around the world in Amazon's clustered data centers. It is lived in that assigned geographical area only to maintain customer distribution. So that in different areas customers can not set up another VPC in another geographical area.
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Yes, VPC works globally. All its components are also working globally. Obviously, they are divided into zone to crate Subnet networks.
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AWS VPC classic link is most important to connect EC2 instance classic form with the VPC using IP address. We need to activate this link in the VPC account. All by default rules will be applicable as per the VPC security group between the EC2 classic instance and the instance in the VPC.
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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.