EC2 101 Flashcards
What is EC2?
Elastic Cloud Compute - Compute based service that has a server!
Reduces time required to obtain and boots servers in minutes allowing scale up and down.
What is On Demand?
Allows you to pay a fixed rate by hour/second with no committment
What is Reserved?
offers significant discounts on hourly charge with contracts of 1 to 3 year terms
What is Spot?
Enables you to bid whatever price you want for instance capacity providing greater savings. flexible start and end times
What is dedicated hosts?
Physical Ec2 server dedicated for use. Helps reduce costs by using your own hardware
True /False
If Spot Instance is terminated by Amazon EC2, you will be charged for partial hour of usage vs terminating instance yourself.
False. You will not be charged if AWS cancels, if you cancel you will be charged.
What is EBS?
Elastic Base Storage - a virtual disc in the cloud that virtual servers run off
What are the two types of EBS Volume Types?
SSD and Magnetic
What is General Purpose SSD?
Balances price and performance
What is Provisioned IOPS SSD?
Highest performance for low latency and high throughput
What is the Lowest cost volume of Magnetic?
Cold HDD (SC1)
What do you use to connect EC2 that unlocks the public?
Private key
What is a security group?
A virtual firewall in the cloud. You need to open ports in order to use them
What is Lambda?
A compute service that is serverless
True /False
You should always design for failure with security groups. Have one EC2 instance in each availability zone
True
Security roles are more ______ , while secret access keys are easier to _______.
secure, manage
When you apply roles to an EC2 instance, the change takes place when?
Immediately
T/F
Roles are Universal. You do not need a specific region for them.
True
What is an Elastic Load Balancer?
A load balancing service that automatically distributes incoming application traffic and scales resources to meet traffic demands.
What are the 3 types of Elastic Load Balancers?
Application Load Balancers
Network Load Balancers
Classic Load Balancers
Which Load balancer handles Static IP addresses and performance?
Network Load Balancer
Which Load Balancer is the cheapest?
Classic Load Balancer
Which ELB is Layer 7 aware and focuses on application
Application Load Balancer
