Networking Services

Question 1

What is VPC?

Answer 1

Virtual Private Cloud. It’s a foundational service that allows you to create a secure private network in the AWS cloud where you launch your resources.

Question 2

What are the components of VPC?`

Answer 2

1. AZ’s: it spans AZ’s within a region
2. Subnet: allows you to split the network inside the VPC. Example: Private and Public. This is where you launch resources like EC2 instances.
3. NACL: Network Access Control Lists: ensure the proper traffic is allowed into the subnet.
4. Router and Route table: Defines where network traffic is routed.
5. Internet Gateway: allows public traffic to the internet from a VPC

Question 3

What allows you to connect 2 VPC’s together?

Answer 3

VPC Peering

Question 4

What is DNS?

Answer 4

Domain Name System. It translates the friendly name (amazon.com) to the IP address(xx.xxx.xx.xx). SO it directs internet traffic.

Question 5

What is Amazon Route 53?

Answer 5

A highly available DNS service that routes users to applications

Question 6

What can Route 53 do?

Answer 6

1. Register your Domain Name
2. Health checks on AWS resources
3. Connect hybrid clouds using DNS query resolution to

Question 7

What is AWS Direct Connect?

Answer 7

• A dedicated physical network connection (super fast) to connect your on-premises data center to AWS
• Your data travels over a private (dedicated) network (unlike VPN which is public network)
• Totally circumvents the public cloud

Question 8

When would you use Direct Connect in the real world?

Answer 8

1. Large datasets that you need to xfer to AWS
2. Business-critical data you need to xfer to AWS bypassing your service provider
3. Hybrid model

Question 9

What is AWS VPN?

Answer 9

• Site-to-Site VPN creates a secure connection between your internal networks and your AWS VPCs.
• Data goes over the public internet
• data is automatically encrypted
• slightly cheaper than Direct Connect

Question 10

When would you use Site-to-Site in the real world?

Answer 10

• moving apps to the cloud

Question 11

What is a virtual private gateway?

Answer 11

The VPN connector on the AWS side.

Question 12

What is the customer gateway?

Answer 12

The VPN connector on the customer side

Question 13

What is the API Gateway?

Answer 13

• Allows you to build and manage API’s.
• it integrates with services such as Lambda