Domain 3: Technology - Networking

Question 1

What is a Subnet?

Answer 1

Range of IP addresses in your VPC

Each subnet resides in a different AZ

Isolate EC2 resources from each other

Isolate EC2 resources from the Internet

Question 2

What is a security group?

Answer 2

A set of firewall rules that control traffic for your instance. Not as smart as a WAF

Question 3

What is a DMZ?

Answer 3

Demilitarized Zone

AKA Screened submetwork

Seperates a LAN from the Internet

Web front ends located in DMZ

Question 4

What do you need to connect to an EC2 instance from Windows?

Answer 4

Private Key

Putty App

PPK (converted from PEM in PuttyGen)

Question 5

What popular ports need to be opened in your security group to allow connections?

Answer 5

SSH (22)

HTTP (80)

HTTPS (443)

RDP (3389)

Question 6

What are the three types of load balancers?

Answer 6

Application - Layer 7

Network - High Performance and static IPs

Classic - Existing apps, phasing out