AWS Basic Networking

Question 1

Smallest CIDR block size used in a VPC?

Answer 1

/28

Question 2

Largest CIDR block size used in a VCP?

Answer 2

/16

Question 3

How many IP addresses reserved by a VPC?

Answer 3

5 addresses

Question 4

What is a VPC?

Answer 4

A logically isolated network dedicated to your AWS account

Question 5

VPCs belong to a single AWS ______ and can span multiple _______ _____.
(HINT: Geography)

Answer 5

Region; availability zones

Question 6

For what purpose does AWS reserve the very first IP address in a subnet?

Answer 6

Network address

Question 7

What is the function of the second IP address in a VPC subnet?

Answer 7

Internal communication

Question 8

What is the function of the third IP address in a VPC subnet?

Answer 8

DNS resolution

Question 9

What is the purpose of the fourth IP address in a VPC subnet?

Answer 9

Reserved for future use

Question 10

What is the purpose of the last IP address in a VPC subnet?

Answer 10

Network broadcast address

Question 11

Which public IP address can be allocated and remapped anytime in AWS?

Answer 11

Elastic IP address

Question 12

Each subnet must be associated with a _____ table.

Answer 12

Route

Question 13

By default, what must every route table contain in order to communicate within the VPC?

Answer 13

A local route

Question 14

What is a route table?

Answer 14

A set of rules that are configured to direct network traffic

Question 15

What two things make up a route table?

Answer 15

A destination and a target

Question 16

What two purposes does an AWS VPC internet gateway serve?

Answer 16

1. Provide a target in your VPC route tables for internet-routable traffic
2. To perform network address translation for instances that have public IPv4 addresses

Question 17

Two types of AWS VPC endpoints?

Answer 17

1. Gateway endpoints

2. Interface endpoints

Question 18

Advantage of NAT gateway over a NAT instance in a public subnet?

Answer 18

Better availability

Higher bandwidth

Less administrative overhead

Question 19

What does the route table target “pcx-id” represent?

Ex: pcx-11112222

Answer 19

A VPC peering connection

Question 20

What are VPC endpoints used for?

Answer 20

Connecting a VPC to supported AWS services while remaining private traffic.

Question 21

Network ACLs are associated to ________.

Answer 21

Subnets

Question 22

Security groups are applied on the _____________ level.

Answer 22

Instance