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Today’s NYT Connections puzzle is a fun one. You might recognize the four green group words right away. Read on for clues and today’s Connections answers.
The Times has a Connections Bot, like the one for Wordle. Go there after you play to receive a numeric score and to have the program analyze your answers. Players who are registered with the Times Games section can now nerd out by following their progress, including the number of puzzles completed, win rate, number of times they nabbed a perfect score and their win streak.
Here are four hints for the groupings in today’s Connections puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.
Yellow group hint: You might spot these while driving around.
Amazon Virtual Private Cloud or Amazon VPC is an AWS service that provides you with a separate area of the cloud. Having this separate area, you can launch your own defined AWS services in a virtual network.
Here, in VPC you have complete control of your virtual environment which includes IP address range, the configuration of route tables, the creation of subnets, and network gateways. Also, the network configurations can be easily customised for the Amazon VPC.
Like all the other AWS services, Amazon VPC provides top-notch security. It has multiple layers of security which include network access control lists and security groups to manage the Amazon EC2 instances’ access in each subnet.
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Now to understand the entire scenario of VPC, even better, let’s have a look at the architecture of VPC.
Architecture of VPC
The above picture shows the architecture of VPC, so there’s an outer region and inside that outer region there’s an Internet Gateway and Virtual Private Gateway.
Internet Gateway and Virtual Private Gateway are what help in the connection with the VPC. These connections pass through the router which directs the coming traffic to the router table.
The two Router Tables then direct the traffic to Network ACL, which is like a firewall for security purposes.
The Network ACLs can either accept or deny the roles. Also, the IP Address can be blocked on the Network ACL.
The respective Network ACL signals to their respective security groups to access lines against the EC2 Instance.
Now, there are two subnets – Public Subnet and Private Subnet. As the name suggests, in the public subnet internet can be accessed by the EC2, while in the private subnet EC2 instance cannot be accessed through the internet.
There’s also a process called “Jump Boxes” which enables you to connect the EC2 Instances (the public subnet can be connected to the private subnet’s instance).
Now, when we know about the architecture of VPC, it’s time to understand the different elements of VPC.
VPC IP addresses use CIDR (Classless Interdomain Routing) IPv6 and IPv4 blocks to define their ranges. Primary and secondary CIDR blocks can be added to the VPC if the secondary Classless Interdomain Routing block comes from a similar address range as the primary block.
Subnet Creation
The EC2 Instance that is launched runs inside a specific VPC subnet. And, each subnet’s CIDR as a subset of the VPC Classless Interdomain Routing block. Every subnet separates its respective traffic from all the other VPC subnet traffic. It must be noted that a subnet can only have one CIDR block and different subnets are to be designated to handle diverse traffic types.
Route Tables
Route Tables are actually the rule book that decides how much network traffic must be directed inside the VPC and subnets. A default route table is created by the VPC called the main route table. And, this main route table has an automatic association with other VPC subnets.
There are two options – either the main route table can be updated and used to direct network traffic OR a new route table can be created for individual subnet traffic.
Internet Connectivity
Each VPC configuration is able to host one Internet Gateway and hence provide NAT or the Network Address Translation services using a NAT Gateway or NAT instances.
Elastic IP Addresses (EIPs)
Elastic IP Addresses or EIPs are IPv4 addresses permanently allocated to the user’s AWS account. The EIPs enable public internet access to the following:
An instance
Elastic Network Interface or ENI
Miscellaneous services that require a public IP address.
Network/Subnet Security
In the VPC architecture, you had seen there’s something called the “security group,” so VPCs use those security groups to give protection for instances. These security groups are referred to as firewalls by AWS.
Additional Networking Services
There are several more services provided by a VPC. The VPC can also be used to configure the following:
Virtual Private Networks or VPNs
Direct connectivity between VPCs or VPC peering
Gateways
Mirror sessions
Now, when you are well versed with the basics of Amazon VPC, let’s have a look at what you can do with a VPC.
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What can you do with a VPC?
Instances can be launched in a subnet that you choose.
Custom IP address ranges can be assigned in each subnet
Route Tables can be configured between subnets.
An internet gateway can be created and attached to your VPC.
You get excellent security over your AWS resources.
Security groups can be assigned to individual instances.
Conclusion By now you would be well versed with everything you need to begin with Amazon Virtual Cloud. In the beginning, we learnt the basics of Amazon VPC and continued to learn its architecture. While at the architecture of VPC, we saw different parts of it and saw each of them briefly.
Once you knew all the architectural parts, you saw the elements of VPC and studied them in brief. Finally, after learning about different elements and several other basics of Amazon Virtual Cloud, we saw the applicability of the same.
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