Enteprise Architecture - topic 7

Question 1

Enterprise architecture

Answer 1

includes the plan on how an organisation will build, deploy, use and share its data, processes, and IT assets (security features etc)
“enterprise architecture is the processes of translating business vision and strategy into effective enterprise change by creating, communicating and improving the key requirements, principles and models that describe the enterprise’s future state and enable its evolution”

• Enterprise architecture is a plan for the IT infrastructure needed in a business

Question 2

Architectural Principles

Answer 2

plan they put together must have;

• being easy to use
• speed and quality
• buy over build (hard to build all intelligence when u can buy it)
• flexbility and agility
• innovative
• data

Question 3

Common architectures

Answer 3

centralised / mainframe architecture - one server
decentralised / server -based architecture - different servers
service - orientated/web based architecture - huge infrastructure carried out by a diff server to different parts then is brought together to be a whole server

Question 4

Understanding existing architecture

Answer 4

what are the problems, whats going on?

Question 5

accessing strategic timeframe

Answer 5

timeframe to improve systems

Question 6

designing for adaptability

Answer 6

how do you design for flexibility

Question 7

designing for scalability

Answer 7

amount of work you need to complete

Question 8

designing for standardization

Answer 8

cant do something crazy - has to be easy to work with

Question 9

What is a DBMS

Answer 9

• database management systems
• a software system that is used to create maintain and provide controlled access to user - databases

column - stores type of data
row - stores a record

Question 10

What is One tier architecture

Answer 10

One-tier architecture involves putting all of the required components for a software application or technology on a single server or platform.

Example: The clients working on the same computer that houses the database server is an example of one tier architecture.

Question 11

What is two tier architecture

Answer 11

The database server is one tier and the clients another tier. Problem was bottle neck of many accessing the one server software applications and data requests from the database.

Example: The clients will be separate computers that access a server for a service. Several client computers can connect to one Database server for example.

Question 12

What is three tier architecture

Answer 12

A 3-tier architectures evolved to avoid the bottle introducing applications servers to serve software application requests and database servers to serve data requests from the database.

Example: Consists of a Database Server, and Application Server and Clients. Many client computers will be accessing these two different servers.

Question 13

What is n- tier architecture

Answer 13

Many servers will be dedicated to Databases, applications, and other functionalities. Clients will be authorized to access various servers as required.

Example: Consists of many servers dedicated to providing various functions.

Question 14

Issues of concern when designing the Enterprise IT architecture and the IT infrastructure

Answer 14

understanding existing architecture 
assessing strategic timeframe 
designing for adaptability 
designing for scalability 
designing for standardization
designing for maintainability 
designing for security 
think about cost