Question 1

When used for data transmission, coaxial cable falls in the middle of the guided transmission media in terms of cost and performance.

Accepted Answer

Coaxial cable is more expensive than twisted pair cable but less expensive than fiber optic cable. In terms of performance, it has higher bandwidth and less susceptibility to interference than twisted pair cable but lower bandwidth and more susceptible to interference than fiber optic cable.

Question 2

_____ is a very short-range wireless connectivity technology designed for consumer electronics, cell phones, and credit cards.

Accepted Answer

Near field communication (NFC) technology is designed for short-range wireless connectivity, typically up to 4 inches. It is commonly used in contactless payment systems, in which an NFC-enabled device like a credit card or smartphone can communicate with a payment reader. It is also used in other consumer electronics like smartphones, tablets, and smartwatches for tasks like sharing files, connecting to Bluetooth devices, and making mobile payments. Microwave transmission and Wi-Fi are not typically used for short-range connectivity, while wireless mesh networks are designed for larger-scale wireless connectivity between devices over a larger area.

Question 3

In a _____, all network devices are connected to a common backbone that serves as a shared communications medium.

Accepted Answer

A bus network has all network devices connected to a common backbone in a linear fashion, making it a shared communications medium. A star network has all devices connected to a central hub or switch, while a ring network has devices connected in a circular fashion with data flowing in only one direction. A mesh network has multiple connections between devices, creating a redundant and resilient network.

Question 4

A virtual private network (VPN) supports a secure, encrypted connection between a company's employees and remote users through a third-party service provider.

Accepted Answer

This is true. A VPN provides a secure and encrypted connection between users and a company's network, typically through a third-party service provider.

Question 5

Which of the following statements is true of radio frequency range for wireless communications?

Accepted Answer

Radio frequency range for wireless communications supports mobile users.

Question 6

One of the primary components of electronic funds transfer (EFT) is wire transfer.

Accepted Answer

Wire transfer is a type of electronic funds transfer which involves transferring funds electronically from one bank account to another, usually across international borders, and is one of the primary components of EFT.

Question 7

Cellular transmission uses radio waves, and hence cellular phone conversations are extremely secure.
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Accepted Answer

While cellular transmission uses radio waves, they can be intercepted and hacked by skilled individuals, making cellular phone conversations not very secure.

Question 8

_____ is a 4G alternative based on a set of IEEE 802.16 wireless metropolitan area network standards that support various types of communications access.

Accepted Answer

WiMAX is a 4G alternative that uses IEEE 802.16 standards to provide wireless metropolitan area network access, enabling various types of communications. LTE is also a 4G technology, but it is based on different standards and is used primarily for mobile networks. UWB and NFC are not 4G technologies, but instead are used for short-range wireless communication and data transfer.

Question 9

The area covered by one or more interconnected wireless access points is commonly called a(n) _____.

Accepted Answer

A hot spot is a designated area where wireless access points, often connected to a wired network, provide Internet access to mobile devices such as laptops or smartphones. It is the most common term used to describe an area covered by interconnected wireless access points. The other options, such as reception area, access area, and coverage zone, are not as commonly used or specific to wireless networking.

Question 10

_____ is a developing network wireless communications frequently used in security systems for sensing and controlling energy-consuming devices.

Accepted Answer

ZigBee is specifically designed for low-data rate, low-power applications, making it ideal for wireless sensing and control systems in the security industry. Wi-Fi and WiMax are better suited for high-bandwidth applications such as internet access, while Bluetooth is intended for short-range communications between devices.

Question 11

A disadvantage of a circuit-switching network is that it is associated with the overhead of assembling and disassembling data into packets.

Accepted Answer

Circuit-switched networks do not use packet switching, so they do not require assembling and disassembling of data into packets. Instead, a dedicated physical circuit is established for the duration of the communication, which can lead to inefficient use of network resources if the circuit remains idle for periods of time.

Question 12

A _____ satellite system employs many satellites that are spaced so that, from any point on the Earth at any time, at least one satellite is on a line of sight, each in an orbit at an altitude of less than 1,000 miles.

Accepted Answer

The description given matches the characteristics of a low earth orbit (LEO) satellite system. LEO satellites are placed in orbits at a lower altitude (less than 1,000 miles) than geostationary satellites, which makes it possible for signals to be transmitted with lower latency. Additionally, LEO satellites are spaced out in such a way that at least one satellite is always in a line of sight from any point on Earth, ensuring seamless global coverage. VSAT and microwave are types of communication technologies, and geostationary satellites are placed in stationary orbits at a much higher altitude than LEO satellites.

Question 13

A digital subscriber line (DSL) delivers high-speed Internet access to homes and small businesses over the existing phone lines of the local telephone network.

Accepted Answer

DSL uses existing phone lines to transmit high-speed Internet access to homes and small businesses.

Question 14

A _____ is a telecommunications network that connects users and their computers in a geographical area that spans a campus or a city.

Accepted Answer

A metropolitan area network (MAN) is designed to connect users and their computers within a specific geographic area that is larger than a local area network (LAN) but smaller than a wide area network (WAN). MANs are commonly used by organizations such as universities and corporations to connect their campuses or facilities located in close proximity to each other.

Question 15

A _____ is one in which all network devices are connected to one another through a single central device called the hub node.

Accepted Answer

A star network is one in which all network devices are connected to one another through a single central device called the hub node. The hub acts as a central point of contact for all devices, and any communication between them must pass through the hub.

Question 16

A client is any computer on a network that sends messages requesting services from the servers on the network.

Accepted Answer

This is the definition of a client on a network.

Question 17

Modems can dial telephone numbers, originate message sending, and answer incoming calls and messages.

Accepted Answer

Modems function as a communication device that can dial telephone numbers, originate messages, and answer incoming calls and messages.

Question 18

_____ operates like Wi-Fi, only over greater distances and at faster transmission speeds.

Accepted Answer

WiMAX operates like Wi-Fi, only over greater distances and at faster transmission speeds.

Question 19

Network management software is a system software that controls the computer systems and devices on a network and allows them to communicate with each other.

Accepted Answer

The answer of Network management software is a system software...

Question 20

The global positioning system (GPS) uses satellites as reference points to calculate positions on Earth to an accuracy of a few yards or even less.

Accepted Answer

GPS does use satellites as reference points to calculate positions on Earth with high accuracy.

Quiz 6: Telecommunications and Networks