Key Concepts - Week Three Flashcards
IT Infrastructure:
The combination of hardware, software, network resources, and services required for the operation and management of an enterprise IT environment
Evolution Stages:
- Mainframe
- PC
- Client/server
- Enterprise computing
- Virtual computing
Mainframe:
1959 - Present
Very fast, very secure, very old
PC:
1981 - Present
Standalone, not connected
Personal productive is good,
not very useful for business
Client/server:
1983 - Present
Connected by a local area network (LAN)
Asynchronous communication
Cost less than mainframe systems
Enterprise computing:
1992 - Present
Connected by a wide area
network (WAN)
Asynchronous communication
Using TCP/IP to connect disparate networks and applications together
Virtual computing:
2000 - Present
Cloud, mobile, internet (TCP/IP) communication
Asynchronous communication
Access computing resources as-needed,
anywhere anytime
Moore’s Law:
Computing power doubles every 2 years (~18 months)
Law of Mass Digital Storage:
The amount of data being stored each year doubles
Metcalfe’s Law and network economics:
Value or power of a network grows exponentially as a function of the number of network members
The 7 Components of IT infrastructure:
- Computer hardware platforms
- Operating system platforms
- Enterprise software applications
- Data management and storage
- Networking/telecommunications platforms
- Internet platforms
- Consulting system integration services
Computer Hardware Platforms:
Includes client machines like desktop PCs, laptops, smartphones, tablets, servers, and mainframes like IBM Z OS used in banking and telecommunications
Consulting and System Integration Services:
Large firms engage leading consulting firms for support with complex infrastructure, such as Accenture and IBM Global Services
Data Management and Storage:
Database software providers like IBM, Oracle, Microsoft, and Apache Hadoop are critical for large-scale systems
Enterprise Software Applications:
By 2020, it was expected that firms would spend over $500 billion on software for enterprise applications
SAP and Oracle being the largest providers
IBM being middleware
Internet Platforms:
Support company websites and intranets with hardware, software, and management services. The Internet hardware server market includes IBM and Dell
Networking/Telecommunications Platforms:
Network operating systems like Windows Server, and network hardware providers such as Cisco and Juniper Networks
Operating System Platforms:
Operating systems for corporate servers and client level such as Windows Server, Unix, Linux, Microsoft Windows, Android, iOS, and Chrome OS
Total Cost of Ownership:
Analyzes direct and indirect costs
Hardware, software account for only about 20% of TCO
The purchase price of an asset plus the costs of operation and maintenance
Cloud Computing:
The delivery of different services through the Internet, including data storage, servers, databases, networking, and software
- On demand service
- Ubiquitous network access
- Location-independent resource pooling
- Rapid elasticity
- Measured service (pay for use)
