Week 8

Question 1

What is data communications?

Answer 1

Data communications is the transmission of digital data between two or more computers and a computer network or data network

Question 2

What are networks?

Answer 2

a set of devices connected by media links

Question 3

What are modern networks primarily used in 3 types of media?

Answer 3

• Metallic wires within cables
• Glass or plastic fibers (fiber-optic cable)
• Wireless transmission

Question 4

What are the two most common types of network infrastructures? (2)

Answer 4

Local Area Network (LAN)

Wide Area Network (WAN)

Question 5

What is Local Area Network?

Answer 5

• A network infrastructure that provides access to users and end devices in a small geographical area, eg., home, school, building or campus

Question 6

What is Wide Area Network?

Answer 6

A network infrastructure that provides access to other networks over a wide geographical area

Question 7

What are 3 other types of networks?

Answer 7

Metropolitan-area network (MAN)
Wireless LAN (WLAN)
Storage-area network (SAN)

Question 8

What is a Storage-area network (SAN)?

Answer 8

A network infrastructure designed to support file servers and provide data storage, retrieval, and replication. It involves high-end servers, multiple disk arrays (called blocks), and Fiber Channel interconnection technology

Question 9

What is a Metropolitan-area network (MAN)?

Answer 9

A network infrastructure that spans a physical area larger than a LAN but smaller than a WAN (e.g., a city). MANs are typically operated by a single entity, such as a large organization

Question 10

What is a Wireless LAN (WLAN)?

Answer 10

Similar to a LAN but wirelessly interconnects users and endpoints in a small geographical area

Question 11

What are three transmission modes?

Answer 11

Simplex
Half duplex
Full duplex

Question 12

What is a simplex transmission mode?

Answer 12

signals transmitted in one direction eg., Television

Question 13

What is a half-duplex transmission mode?

Answer 13

both stations transmit, but only one at a time eg. police radio

Question 14

What is a full-duplex transmission mode?

Answer 14

simultaneous transmissions eg. telephone

Question 15

What is an open systems interconnection (OSI) model?

Answer 15

Open Systems Interconnection (OSI) was an international effort by the International Organization for Standardization (ISO) to enable multivendor computer interconnection

Question 16

What are 3 attributes of IoE?

Answer 16

Hyper aware
Ability to predict
Agility

Question 17

What is the attribute of hyper awareness in IoE? (3)

Answer 17

◦ Sense the location, status, and context of company assets and customers
◦ Monitor consumer sentiment and behaviors in real time
◦Identify market and competitive changes

Question 18

What are 7 challenges of IoE?

Answer 18

• Security
• Privacy
• Reliability
• Open social and political discussions
• Network protocols
• Storage
• Analytics

Question 19

What is the attribute of the ability to predict in IoE? (3)

Answer 19

◦ Anticipate market transition
◦ Optimise performance of assets and operations
◦ Foresee and proactively address emerging security threats

Question 20

What is the attribute of the ability of agility? (3)

Answer 20

◦ Achieve competitive differentiation by responding faster than rival
◦ Foster innovation by building “platforms” advantage
◦ Respond to rapidly evolving threats