Chapter 2

Question 1

what is reference model

Answer 1

an abstract frame work that help understand relationship between entities in specific environment not linked to specific tech or implementation and its provide common language that can be used clearly for deferent language

provide point of reference for system designers to extract specification

Question 2

what is the entities of physical layer and the function

Answer 2

storage device-network-compute system
function : execute request generated by virtualization and control layer
stored data - executing program

Question 3

what is the entities of virtualization layer and the function

Answer 3

virtualization software - pool resource - virtual resource

function : abstract physical resources and make them appear as virtual resources

Question 4

what is the entities of control layer and the function

Answer 4

control software
enable provisioning resource , enable resource config and resource pool config , Collab with virtual to make resource pool and virtual resources

Question 5

service layer

Answer 5

consumer can interact and consume cloud resources through this layer

service catalog
self service portal

store info of cloud resources through service catalog

access and manage cloud resources by self service portal

Question 6

security layer

Answer 6

security admnistrive mechanism security and personal polices

tech mechanism antivirus , firewall

Question 7

green field and brown field

Answer 7

when there is no exiting infrastructure and need to build cloud from physical layer

when the infrastructure already exist and can be upgraded to cloud infrastructure by adding remaining components

Question 8

what is service level agreement

Answer 8

contract between provider and consumer that specifies parameter and metric like cost