AWS Fundamentals Flashcards
1
Q
AWS Global Network consists of
A
- regions - world wide spread (when you interacting with service then you interacting with this service in concrete region)
- Edge Location - more places then region but less services
2
Q
What are Availability Zones ?
A
- smaller parts of regions
-
isolated infrastructure inside region
-** when services fail in one of AZ’S it can running on another AZ** - connected High-speed connection
3
Q
What 2 part we can divide AWS Services ?
A
- public services
- private services
4
Q
Why Edge Locations are important ?
A
- Netflix - low latency and** high speed distribition **
- further data is from customer then tranfser is slower
5
Q
How resillience works in AWS ?
A
- Global resillience for global services like IAM , when one region fails then other will run this service
- Region resillence - when service is replicated between multiple AZ’S then when one AZ’S fails other will run, if whole region fails then service will fail
- AZ Resillience - when service runs on single AZ then when AZ fail then service will fail
6
Q
What are Regions benefits
A
- geographic and infrastructure isolation - provides resilience
- geopolitical spearation
- wordwide spread provides performace for clients from all of the world
7
Q
What is default VPC ?
A
- Virtual Private Cloud
- virtual network inside AWS
- one per region (can be removed & recreated)
- Default VPC CIDR is always 172.31.0.0/16
- /20 Subnet in each AZ in the region
- subnets assing public IPv4 addresses
8
Q
EC2 KEY Facts & Features
A
- IAAS - provides Virtual Machines - Instances
- Private service by default - uses VPC network
- AZ Resilient - Instance fails if AZ fails
- On- Demand Biling per Second
9
Q
S3 Buckets key points
A
- name** globally unique **
- 3-63 , all lower, no uderscores
- start with lowercase or a number
- 100 soft limit - 1000 hard per account
- unlimited objects in bucket, 0 bytes to 5TB
- Keyn:name, Value:data
