AWS Tutorial AWS Solutions Architect and SysOps Administrator - Private Subnet Versus Public Subnet

This lecture explains the differences between public and private subnets in AWS. It covers the creation of a VPC, subnets, security groups, route tables, and internet gateways. The lecture details how to configure a public subnet with a public route table and a private subnet with a private route table. It also discusses the use of NAT gateways for internet access from private subnets and the role of a Bastion host for accessing private instances. The lecture concludes with a summary of the key differences between public and private subnets.

What is the primary purpose of a VPC in AWS?

• To create isolated networks within AWS

• To manage user accounts

• To provide analytics services

• To store large amounts of data

How does a public subnet allow instances to be accessed from outside the VPC?

• By using a VPN connection

• By assigning a private IP

• By using a public route table and Internet gateway

• By using a local gateway

What is a key characteristic of a private subnet?

• It is accessible from any network

• It routes traffic through a local gateway

• It uses a public IP for communication

• It has direct access to the Internet

Why might you need a NAT Gateway in a private subnet?

• To provide a public IP to instances

• To store data securely

• To allow instances to access the Internet for updates

• To enable direct SSH access from outside

What is the role of a Bastion host in a VPC?

• To provide a secure entry point for administrative access

• To store backup data

• To host web applications

• To manage DNS settings

How can instances in a private subnet download necessary packages?

• Through a NAT Gateway in a public subnet

• By using a local gateway

• By connecting to a VPN

• By using a direct Internet connection

What is the main difference between a public and a private subnet?

• Public subnets can access the Internet directly, private subnets cannot

• Private subnets have more storage capacity

• Private subnets are faster

• Public subnets are more secure