EC2

Question 1

What different types of EC2 instance are there?

Answer 1

General purpose, Compute Optimized, Memory O., Accelerated computing, Storage O., Instance features, Measuring Instance performance

Question 2

Describe the general purpose EC2 instance type, and give a use case.

Answer 2

Balance between compute, memory and networking.
Good for web servers or code repositories.

Question 3

Describe the Compute Optimized EC2 instance type, and give a use case.

Answer 3

For compute-intensive tasks that require high performance processors.
- Batch processing workloads
- Media transcoding
- High performance computing (HPC)
- Scientific modelling & machine learning
- Dedicated gaming servers

Question 4

Describe the Memory Optimized EC2 instance type, and give a use case.

Answer 4

Fast performance for workloads that process large data sets in memory.
- High performance relational/non-relational databases
- Distributed web scale cache stores
- In-memory databases optimized for BI
- Applications performing real-time processing of big unstructured data

Question 5

Describe Storage Optimized EC2 instance type, and give a use case.

Answer 5

Good for storage-intensive tasks that require high, sequential read and write access to large data sets on local storage
- High frequency online transaction processing (OLTP) systems
- Relational & NoSQL databases
- Cache for in-memory databases (e.g. Redis)
- Data warehousing applications
- Distributed file systems

Question 6

What is port 22 used for?

Answer 6

SSH - log into a linux instance
SFTP - Secure File Transfer Protocol (upload files using SSH)

Question 7

What is port 21 used for?

Answer 7

FTP (File Transfer Protocol) - upload files into a file share

Question 8

What is port 80 used for?

Answer 8

HTTP - access to unsecured websites

Question 9

What is port 443 used for?

Answer 9

HTTPS - access to secured websites

Question 10

What is port 3389 used for?

Answer 10

RDP (Remote Desktop Protocol) - log into a Windows instance