VPC

Question 1

What is VPC?

Answer 1

• Virtual Private Cloud
• private network to deploy your resources (regional resource)

Question 2

IP Addresses in AWS

Answer 2

• IPv4, Elastic IP (fixed public IPv4), IPv6

Question 3

Subnets

Answer 3

• allow you to partition your network inside your VPC (Availibility Zone resource)

Question 4

Public & Private subnet

Answer 4

• public subnet: is a subnet that is accessible from the internet (Route Tables between internet and subnets)
• private subnet: is a subnet that is not
  accessible from the internet

Question 5

Internet Gateway & NAT Gateways

Answer 5

• Internet Gateways helps VPC instances connect with internet –> Public Subnets have route to internet gateway
• NAT Gateways allow instances in Private Subnets to access internet while privat

Question 6

NACL (Network ACL) & Security Groups

Answer 6

• NACL = A firewall which controls traffic from and to subnet –> attached at the Subnet level
• Security Groups = A firewall that controls traffic to and from an EC2 Instance

Question 7

VPC Flow Logs

Answer 7

• Capture information about IP traffic going into your interfaces
• Helps to monitor & troubleshoot connectivity issues

Question 8

VPC Peering

Answer 8

• Connect two VPC, privately using
  AWS’ network
• connection is not transitive

Question 9

VPC Endpoints

Answer 9

• allow to connect to services using private network instead of public www network

Question 10

AWS PrivateLink

Answer 10

• Privately connect to a service in a 3rd party VPC

Question 11

Site to Site VPN

Answer 11

• VPN over public internet between on-premises DC and AWS

Question 12

Direct Connect (DC)

Answer 12

• direct private connection to AWS

Question 13

Client VPN

Answer 13

• OpenVPN connection from your computer into your VPC

Question 14

Transit Gateway

Answer 14

• Connect thousands of VPC and on-premises networks together