Question 1

A service that uses existing phone lines to provide high-speed connections is called _______.

Accepted Answer

DSL (Digital Subscriber Line) is a service that uses existing phone lines to offer high-speed internet connections. It is a popular choice for residential and small business users who require fast internet speeds but cannot access cable or fiber optic services. WWAN (Wireless Wide Area Network) and 3G/4G are wireless technologies that use cellular networks to provide internet connectivity, while voiceband refers to the frequency range used for analog voice communications over traditional phone lines.

Question 2

_______ is the process of breaking down information sent or transmitted across the Internet into small parts.

Accepted Answer

Packetization is the process of breaking down information into small packets for transmission over the Internet. These packets are then reassembled in the correct order at the destination.

Question 3

Using this type of communications channel, several users can simultaneously use a single connection for high-speed data transfer.

Accepted Answer

Broadband allows multiple users to share the same high-speed connection, making it a highly efficient communications channel. Voiceband only supports low-speed data transfer and is primarily used for voice communication, while Medium band and Baseband do not support multiple users sharing a connection.

Question 4

Which physical connection is the fastest?

Accepted Answer

Fiber-optic cable has the fastest physical connection because it uses light to transmit data, which can travel at almost the speed of light.

Question 5

The capacity of a communication channel is measured in _______.

Accepted Answer

Bandwidth is the maximum amount of data that can be transmitted through a communication channel in a given time period. It is measured in bits per second (bps) or hertz (Hz). Therefore, option A is the correct choice. Option B is incorrect because bit capacity is not a commonly used term to measure channel capacity. Option C is also incorrect because band rate is not a standard term used in communication engineering. Option D is incorrect because data flow is a measure of the volume of data being transmitted, but it is not synonymous with channel capacity.

Question 6

In a computer network, this node that requests and uses resources available from other nodes.

Accepted Answer

A client is a node that requests and uses resources available from other nodes. Clients typically access servers for files, applications, and other services.

Question 7

Cellular services use _______ to provide wireless connectivity to the Internet.

Accepted Answer

Cellular services use the 3G and 4G cellular networks to provide wireless connectivity to the Internet. ADSL and DSL are wired technologies that use telephone lines for Internet connections, while T1 and T3 are also wired technologies used for high-speed data transfer over long distances.

Question 8

In a communication system, which among the following originate and accept messages in the form of data, information, and/or instructions?

Accepted Answer

Sending and receiving devices, such as computers and smartphones, are the endpoints of a communication system. They are responsible for originating and accepting messages in the form of data, information, and/or instructions. Communication channels are the pathways through which the messages are transmitted, connection devices establish and maintain the link between the sending and receiving devices, and data transmission specifications define the technical details of how the messages are transmitted over the communication channels.

Question 9

Which among the following is considered a line-of-sight communication medium?

Accepted Answer

Microwave communication is a line-of-sight communication medium that uses high-frequency radio waves to transmit data between two points. It requires a clear path between the transmitter and receiver, without any obstacles that could block or reflect the signal. Broadcast radio and satellite communications can cover longer distances and do not require a clear line of sight. Bluetooth is a short-range communication technology that uses low-power radio waves and can work through walls and other obstacles.

Question 10

The _______ is the central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes.

Accepted Answer

The switch acts as a central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes within a local area network. A client is a computer or program that requests services or resources from a server, while a server provides services or resources to clients. A gateway is a node that connects different networks, while a switch connects devices within the same network. Therefore, the most appropriate choice is C, switch.

Question 11

Microwave communication uses high-frequency _______.

Accepted Answer

Microwave communication uses high-frequency radio waves, typically between 1 and 100 gigahertz (GHz). This range falls within the radio frequency (RF) portion of the electromagnetic spectrum. Infrared, satellite communications, and optic fibers are all separate technologies that operate on different parts of the spectrum.

Question 12

The essential features of this include identifying, sending, and receiving devices and breaking information into small parts for transmission across the Internet.

Accepted Answer

The essential features described in the statement are all components of the TCP/IP protocol, which is the primary communication protocol used for transmitting data over the Internet. DNS, FTP, and HTTPs are all specific applications that utilize the TCP/IP protocol.

Question 13

_______ is a term relating to sending data to a satellite.

Accepted Answer

Uplink is the term used for sending data or signals from a ground-based transmission station to a satellite. This includes commands, data, and other communication signals.

Question 14

In a communication system, which among the following convert messages into packets that can travel across the communication channel?

Accepted Answer

The answer of In a communication system, which among the...

Question 15

A wireless access point that provides Internet access in a public place such as a coffee shop, library, bookstore, or university.

Accepted Answer

A wireless access point that provides Internet access in a public place is commonly known as a hotspot. The other choices, NIC, blindspot, and gateway, do not accurately describe this type of access point.

Question 16

The GPS device in an automobile uses which communication channel?

Accepted Answer

GPS devices in automobiles use satellite communication to receive location data and provide navigation information. Infrared and microwave communication are not suitable for long-distance communication necessary for GPS navigation, and RF can be prone to interference and poor signal quality.

Question 17

Every computer on the Internet has a unique numeric address called a(n) _______.

Accepted Answer

An IP (Internet Protocol) address is a unique numerical identifier assigned to every device connected to the Internet.

Question 18

This device enables connectivity between two LANS or a LAN and a larger network.

Accepted Answer

A network gateway is a device that connects two different networks, allowing data to flow between them.

Question 19

One of the most dramatic changes in connectivity and communications in the past few years has been _______.

Accepted Answer

The widespread use of mobile devices with wireless Internet connectivity has revolutionized the way people connect to the Internet and communicate with each other, enabling access to information and communication anywhere and at any time.

Question 20

WiMax stands for _______.

Accepted Answer

WiMax stands for Worldwide Interoperability for Microwave Access.

Quiz 8: Communications and Networks