EC2 Flashcards
_____ is a web service that provides resizable compute capacity in the cloud.
EC2
T or F EC2 reduces the time required to obtain and boot new server instances to minutes, allowing you to quickly scale capacity, both up and down, as your computing requirements change.
true
T or F With EC2, you only pay for the capacity that you actually use.
True
EC2 provides _______ the tools to build _____ resilient apps and isolate themselves from common _____ scenarios.
developers failure failure
allows you to pay a fixed rate by the hour (or second) with no commitment
EC2 on demand
provides you with a capacity reservation, and offer a significant discount on the hourly charge for an instance. 1 year or 3 year terms.
EC2 Reserved
Enables you to bid whatever price you want for instance capacity providing for even greater savings if your apps have flexible start and end times.
EC2 Spot
Physical Ec2 server dedicated for your use. This can help you reduce costs by allowing you to use your existing server bound software licenses.
Dedicated hosts
- perfect for users that want the low cost and flexibility of amazon ec2 without any upfront payment or long term commitment a)on demand b)reserved instances c)spot instances d) dedicated hosts
A) on demand
Applications with short term, spiky, or unpredictable workloads that can’t be interrupted. a)on demand b)reserved instances c)spot instances d) dedicated hosts
A) on demand
Applications that have flexible start and end times a)on demand b)reserved instances c)spot instances d) dedicated hosts
C) Spot instances
Applications with steady state or predictable usage a)on demand b)reserved instances c)spot instances d) dedicated hosts
B) reserved instances
Applications being developed or tested on EC2 for the first time. a)on demand b)reserved instances c)spot instances d) dedicated hosts
A) on demand
Applications that require reserved capacity. a)on demand b)reserved instances c)spot instances d) dedicated hosts
B) reserved isntances
Applications that are only feasible at very low compute prices. a)on demand b)reserved instances c)spot instances d) dedicated hosts
C) spot instances
Useful for regulatory requirements that may not support multi-tenant virtualization. a)on demand b)reserved instances c)spot instances d) dedicated hosts
D) dedicated hosts
Users can make up-front payments to reduce their total computing costs even further. a)on demand b)reserved instances c)spot instances d) dedicated hosts
B) reserved instances
The standard version of this is up to 75% off of on-demand. a)on demand b)reserved instances c)spot instances d) dedicated hosts
B) reserved instances
Great for licensing which does not support multi-tenant or cloud deployments. a)on demand b)reserved instances c)spot instances d) dedicated hosts
D) dedicated hosts
The convertible version of this save up to 54% off on-demand a)on demand b)reserved instances c)spot instances d) dedicated hosts
B) reserved instances
User with an urgent need for large amounts of additional computing capacity. a)on demand b)reserved instances c)spot instances d) dedicated hosts
C) Spot instances
T or F Dedicated hosts can be purchased on demand.
True
Can be purchased as a reservation for up to 70% off on-demand price. a)on demand b)reserved instances c)spot instances d) dedicated hosts
D) dedicated hosts
______ feature the capacity to change the attributes of the RIs as long as the exchange results in the creation of reserved instances of equal or greater value. Pick one: Standard RIs Convertible RIs
standard RIs
______ are avilable to launch within the time window you reserve. This option allows you to match your capacity reservation to a predictable recurring schedule that only requires a fraction of a day, a week, or a month. Pick one: Standard RIs Convertible RIs
Convertible RIs
Name the types of Elastic Load Balancers
- Application LB
- Network LB
- Classic LB
Best suited LB for TCP traffic where extreme performance is required.
- Applicaiton LB
- Network LB
- Classic LB
Network LB
Best suited for LB of HTTP and HTTPS traffic.
- Applicaiton LB
- Network LB
- Classic LB
Application LB
With this ELB, you can balance HTTP/HTTPS apps and use layer 7 specific features, such as x-forwarded and sticky sessions. You can also use sctrict layer 4 LB for apps that rely purely on the TCP protocol.
- Applicaiton LB
- Network LB
- Classic LB
Classic LB
They operate at layer 7 and are app aware. They are intelligent and you can create advanced request routing, sending specified requests to specific web servers.
- Applicaiton LB
- Network LB
- Classic LB
Application LB
They operate at the connection level (layer 4). They are capable of handling millions of requests per second , while maintaining ultra-low latencies. Used for extreme performance.
- Applicaiton LB
- Network LB
- Classic LB
Network LB
If you app stops responding, the _____ responds with a 504 error. This means the app is having issues. This could be either at the web server layer or at the DB layer. Identify where teh app is failing and scale it up or out where possible.
- Applicaiton LB
- Network LB
- Classic LB
Classic LB
x-forwarded for header
a common method for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer.
