Main Test Flashcards
Describe High Availability regarding cloud service:
- Agreed level of uptime
- Specified in SLA
High Availability is achieved by using(select one):
- lots of servers
- multiple locations
- redundancy
- redundancy
Describe two forms of scalability using cloud service:
- Scaling up(vertical): more CPU cores, memory, disks
- Scaling out(horizontal): more Servers
Describe elasticity:
- ability to quickly expand/decrease computer processing, memory and storage
Describe Agility:
- how fast Azure can allocate/deallocate resources
Describe Fault Tolerance:
- continuing to provide a service to underlying application even after the failure of one/more components in any layer
Describe Disaster Recovery:
- Backups, screenshots
- to retain multiple copies of data
Describe Economies of Scale regarding Cloud Providers:
- Ability to do things more efficiently at a larger scale
- Providers find ways to lower cost (i.e. discounts from govt regarding tax savings, low electricity rates
Any product will inevitably have a ____ cost as the product becomes more of a commodity.
- core
What is Capital Expenditure(CapEx)?
- upfront costs for all the hardware
- tax is deducted over time
- Think of ‘Value that decreases over time
What is Operational Expenditure(OpEx)?
- spending money on services/products now, and being billed for it now
- pay for product as you use it
- NO upfront cost
Give examples of CapEx computing costs?
- server
- storage
- network
- data infrastructure ( warehouse.. etc)
- think of on-premise cost
Give Examples of OpEx computing costs?
- cloud-based server (pay-per-use model)
- leasing software
- scaling chargers based on usage/demands (CPU
usage time) - think of off-premise cost
List some benefits of CapEx?
- fixed costs
- works best with a fixed budget
List some benefits of OpEx?
- pay-per-use costs
- works best with fluctuating demands based upon
services
What is a consumption-based-model?
- customer pays for the resources they use
What are the three Cloud deployment models?
- Public Cloud
- Hybrid Cloud
- Private Cloud
Describe Public Cloud Deployment
- no local hardware
- everything online
- (no upfront CapEx)
Describe Private Cloud Deployment
- all local hardware
- upfront CapEx Costs
Describe Hybrid Cloud Deployment
- mix of public/private cloud model
- own some local hard, some online services
- some CapEx costs
- best used when you need a private server for legal
reasons
What are the 3 main Cloud Services?
- Infrastructure as a Service (IAAS)
- Platform as a Service (PAAS)
- Software as a Service (SAAS)
Describe IAAS
- most flexible cloud services
- per-per-use
- complete control over hardware
- you do not buy hardware, you rent
- user manages OS, middleware, runtime, data and applications
List possible IAAS usage scenarios
- Migrating workloads
- Test/Deployment
- Website Hosting
- Storage/Backup/Recovery
Describe PAAS:
- User manages data and applications
- per-per-use
List possible PAAS usage scenarios
- provides an environment to build, test and develop software applications
Describe SAAS:
- user manages nothing
- typically subscription based
- example D365
List possible SAAS usage scenarios
- business needs simple access to use D365
- no demands to for customization
What is a region?
- geographical area containing at least one or more data center
(eg West US, Canada Central, West Europe)
