INSY5111 LU5

What is the primary role of data communication systems as highlighted in the learning material?

• To provide entertainment services

• To facilitate efficient data transfer and collaboration

• To enhance hardware performance

• To replace traditional communication methods

Which of the following is an example of reduced security due to network technology?

• Increased security through restricting access via usernames and passwords

• More external access points to the network on wide-area networks and the Internet

• Reduced costs through sharing hardware and software

• Improved sharing of information and hardware resources

What is a disadvantage of microwave communication in wireless transmission?

• It is limited to low-speed data transmission

• It requires a physical cable connection

• It must be sent in a straight line without obstructions

• It cannot transmit voice signals

Which type of modem uses the same cable that connects TVs for internet connections and offers speeds of about 16 Mbps?

• DSL Modems

• Analogue Modems

• Cable Modems

• Wireless Modems

What is the role of a router in data communication?

• To convert signals for transmission over phone lines

• To identify the best network destination for data

• To provide high-speed broadband over phone lines

• To broadcast communications in radio frequencies

What is the main characteristic of twisted-pair wire cable used in home and office telephone connections?

• Sturdy copper or aluminum wire wrapped with spacers

• Pairs of plastic-coated copper wires twisted together

• Cables consisting of thin filaments of glass fibre

• High-speed data transmission

What is the primary purpose of the OSI model, as described in the text?

• To define how computers are manufactured

• To standardise interactions between computers in a network

• To improve hardware compatibility

• To enhance software development processes

Which type of network is designed to cover a large geographical area, such as a city or country?

• Local Area Network (LAN)

• Wide Area Network (WAN)

• Metropolitan Area Network (MAN)

• Personal Area Network (PAN)

What is the typical range covered by a Metropolitan Area Network (MAN)?

• 10 to 20 miles.

• 30 to 90 miles.

• 100 to 200 miles.

• 5 to 15 miles.

What is the main characteristic of a star topology?

• Nodes are connected in a circular manner.

• Nodes are connected to a central computer.

• Nodes are connected in a hierarchical structure.

• Nodes are connected in a mesh network.