4.1 – Cloud Computing Service Models

Question 1

Software as a Service
SAAS

Answer 1

a. Vendors host the apps, making them available to users via the Internet
—DON’T maintain server, OS, database

b. Metered utilization = pay for how you use it

c. Very popular

EX: Office 365, Google Docs, Quickbooks, Sales force

Question 2

Platform as a Service
PAAS

Answer 2

a. Offers developers a platform for software development & deployment over the internet

b. Access up-to-date tools

c. EX: rent a server –
AWS: comes with OS, database
—Put web app on it
—You DEVELOP APP & run it on someone else’s server

Question 3

Infrastructure as a Service
IAAS

Answer 3

a. Used by companies that don’t want to maintain their own on-premises data centers

b. Want to run own OS

c. Get = blank VM – intall own OS, app, data

d. Manage them yourself [remote access]