Question 1

The bandwidth of a channel that carries digital data is usually measured in ___________.

Accepted Answer

Bandwidth of a channel that carries digital data is usually measured in bits per second as digital data is represented in binary format, which uses bits (0s and 1s) to represent data. Bytes per second is a measure of the amount of data transferred in a unit of time, while GHz refers to the frequency of the channel, and microwaves refer to the type of signal used to transmit data.

Question 2

Network channels that are capable of moving at least 25 megabits of data per second are classified as _________ channels.

Accepted Answer

broadband

Question 3

The Internet is the world's largest WAN.

Accepted Answer

The Internet is a worldwide network of networks, which makes it a Wide Area Network (WAN).

Question 4

Networks can be classified according to their size and geographic scope.

Accepted Answer

Networks can indeed be classified according to their size (such as LAN, MAN, WAN) and geographic scope (such as local, regional, global).

Question 5

Microwaves have more carrying capacity than radio waves.

Accepted Answer

Microwaves have higher frequency and shorter wavelength than radio waves, which allows them to carry more information and data at a faster rate. Therefore, they have more carrying capacity than radio waves.

Question 6

Which type of network topology connects a peripheral device to a host device?

Accepted Answer

In a point-to-point topology, a peripheral device is directly connected to a host device, allowing direct communication between the two.

Question 7

Which type of network topology connects multiple devices to a central device?

Accepted Answer

A star network topology connects multiple devices to a central device, usually a switch or a hub. This central device acts as a mediator for all communication in the network, which helps to prevent collisions of data packets and simplify network management.

Question 8

In the context of communication networks, the term __________ refers to the structure and layout of network components.

Accepted Answer

The answer of In the context of communication networks, the...

Question 9

Which type of network connects smart devices or consumer electronics within a range of about 30 feet (10 meters) and without the use of wires or cables?

Accepted Answer

PAN (personal area network) is the type of network that connects smart devices or consumer electronics within a range of about 30 feet (10 meters) and without the use of wires or cables. Examples of devices that can be connected through PAN include smartphones, tablets, laptops, and smartwatches. Therefore, option A is the best choice for this question.

Question 10

The most widespread wireless channel for communication networks is radio frequency (RF) signals.

Accepted Answer

Radio frequency signals are indeed the most widespread wireless channel for communication networks, as they offer a cost-effective, efficient, and reliable means of transmitting data wirelessly over distances ranging from a few meters to several kilometers. RF signals are used in a variety of wireless communication systems, including cellular networks, Wi-Fi networks, Bluetooth, Zigbee, and RFID systems. They operate within a defined frequency range, typically between 3 kHz and 300 GHz, and are capable of transmitting high-speed data rates and supporting various applications, from voice and messaging services to video streaming and IoT connectivity.

Question 11

Which of the following is an advantage of wired connections?

Accepted Answer

Wired connections are generally more secure as they limit the potential for outside interference or hacking. They also tend to be more dependable, with fewer connectivity issues compared to wireless connections. In addition, wired connections can offer faster speeds than wireless connections. Therefore, all of the above are advantages of wired connections.

Question 12

In a wireless network, RF signals are sent and received by a ______________.

Accepted Answer

The answer of In a wireless network, RF signals are...

Question 13

When interference affects a wireless signal, data must be retransmitted.

Accepted Answer

Interference can cause a disruption in the wireless signal, leading to errors in the transmission of data. When this happens, the data that was affected needs to be retransmitted to ensure that it reaches its destination accurately. This can lead to delays and decreased network performance.

Question 14

Wireless connections use unlicensed frequencies that are available for public use, including 2.4 GHz and _____ GHz, which is subject to less interference from other devices, but it has a more limited range.

Accepted Answer

The answer of Wireless connections use unlicensed frequencies that are...

Question 15

Which type of network covers a large geographical area and usually consists of several smaller networks, which might use different computer platforms and network technologies?

Accepted Answer

WAN (Wide Area Network) covers a large geographical area and can consist of different smaller networks. It can connect multiple LANs and other networks together, even if they are in different locations or even countries.

Question 16

A communication _________ is the medium used to transport information from one network device to another.

Accepted Answer

The answer of A communication _________ is the medium used...

Question 17

Which type of cable is used for high-capacity trunk lines that provide main routes for telephone, cable, and Internet communications?

Accepted Answer

Fiber-optic cables are the most commonly used cables for high-capacity trunk lines as they have a much higher bandwidth and can transmit data over much longer distances than copper cables. Category 6 cables are often used for local area networks (LANs) in buildings, while coaxial cables are commonly used for cable television and some broadband internet connections.

Question 18

Which type of network topology allows for redundant paths between devices that can be used to bypass failed devices?

Accepted Answer

A mesh network topology allows for redundant paths between devices, meaning that if one device fails, the network can still function because there are multiple paths available. This makes a mesh topology more reliable than other topologies, such as star or bus, which do not have this redundancy.

Question 19

________ is the term for the transmission capacity of a communication channel.

Accepted Answer

The answer of ________ is the term for the transmission...

Question 20

Wireless connections use licensed frequencies that are available for public use.

Accepted Answer

Wireless connections can use both licensed and unlicensed frequencies. Public Wi-Fi, for example, often operates on unlicensed bands that are available for anyone to use, not just licensed frequencies.

Quiz 3: Networks