Lecture 3: Technological Foundations and Modern IT Infra

Question 1

What is Moore’s Law?

Answer 1

• Chip performance per dollar doubles roughly every 18 months
• The complexity for minimum component costs has increased at a rate of roughly a factor of two per year
• Adapted to predict doubling every two years staring 1980
• Currently slowed down to doubling every 2.5 years

Question 2

What are three chip based components?

Answer 2

• Microprocessor
• Random-access memory
• Flash or solid state drives

Question 3

What are three mechanical (moving) components?

Answer 3

• Hard disk
• Fans
• Disc drives

Question 4

What is the evolution of IT hardware?

Answer 4

1. Mainframe era (1959)
2. Minicomputers (1965)
3. Personal computing (1981)
4. Client-server era (1983)

Question 5

Client server model vs Peer to Peer

Answer 5

• Client server model distinguish between providers and requesters
• In P2P, participants are both suppliers and consumers of resources

Question 6

What is the internet?

Answer 6

A decentralized system of networks that links devices around the glob and enables data transmission among them

Question 7

What are common application transfer protocols?

Answer 7

• HTTP
• SMTP
• FTP

Question 8

What is TCP and IP

Answer 8

• TCP (transmission control protocol) slices data that is to be sent into packages
• IP routes these packages to the target computer
• TCP at target computer checks for completeness and reassembles packages

Question 9

What are the advantages and disadvantages or cloud computing?

Answer 9

Advantages

• Reduce upfront costs
• Increased flexibility for scaling

Disadvantages

• May lead to higher long term costs
• Dependence on providers
• Moving legacy systems to cloud may be costly

Question 10

What are the different cloud computing services?

Answer 10

Infrastructure as a service

Platform as a service

Software as a service