CGS 2060 CH.10

25 July 2022
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44 test answers

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question
Which of the following is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?
answer
microwave station
question
Which of the following is the greatest problem with regard to a bus network?
answer
The bus itself might become inoperable.
question
Which of the following is the maximum transfer transmission rate for communications satellites?
answer
2.56 Tbps
question
For best performance of a communications channel, which of the following should be true?
answer
bandwidth should be high and latency low
question
Which of the following is the data transfer rate equivalent to one million bits per second?
answer
Mbps
question
Which of the following terms identifies any network based on the 802.11 family of standards?
answer
Wi-Fi
question
Which of the following kinds of modems is a modem that sends and receives digital data over and information to and from a digital line?
answer
broadband
question
On a network such as the one illustrated in the accompanying figure, if one node fails, as long as that node is not providing services to other nodes on the network, what happens?
answer
only that node is affected
question
How many wired and/or wireless computers and mobile devices might a router be able to connect?
answer
more than 200
question
The design of computers, devices, and media in a network is categorized as either client/server or peer-to-peer. What is the term used to refer to this characterization?
answer
network architecture
question
Which of the following kinds of cable consists of a single copper wire surrounded by at least three layers: an insulating material, a woven or braided metal, and a plastic outer coating?
answer
coaxial
question
Which of the following is a wireless transmission medium that distributes radio signals through the air over long distances?
answer
broadcast radio
question
Which of the following is true of broadcast radio with regard to physical transmission media?
answer
It is slower and more susceptible to noise.
question
Digital communications describes a process in which two or more computers or devices transfer all of the following EXCEPT ____.
answer
networks
question
Which of the following is true of the installation of a network like the one shown in the accompanying figure?
answer
It can span a larger distance than a bus network, but it is more difficult.
question
Microwave transmission involves sending signals from one microwave station to another. What is this often called?
answer
fixed wireless
question
The amount of data, instructions, and information that can travel over a communications channel sometimes is called which of the following?
answer
bandwidth
question
Which of the following kinds of devices is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device?
answer
communications
question
Which of the following is the least likely technology PANs would use?
answer
peer-to-peer
question
How many feet can the range of Bluetooth devices be extended with additional equipment?
answer
325
question
Which of the following is a network standard that specifies no central computer or device on the network should control when data can be transmitted?
answer
Ethernet
question
As illustrated in the accompanying figure, on what kind of network must all of the computers and devices (nodes) on the network connect to a central device?
answer
star network
question
Which of the following enables a computer or device that does not have built-in networking capability to access a network?
answer
NIC
question
Which of the following has the fastest transfer rate?
answer
ATM
question
Which of the following is a transmission media on which data, instructions, or information travel?
answer
communications channel
question
For smaller business and home networks, which of the following allows multiple computers to share a single broadband Internet connection such as through a cable modem or DSL modem?
answer
router
question
Which of the following terms is an electrical disturbance that can degrade communications?
answer
noise
question
Which of the following can be avoided if a computer or mobile device has a motherboard that integrates networking capability?
answer
NIC
question
What is the maximum transfer transmission rate for Bluetooth?
answer
24 Mbps
question
Who invented the Ethernet?
answer
Robert Metcalfe
question
Which of the following did Sven Mattisson and Jaap Haartsen invent?
answer
Bluetooth
question
The type of network shown in the accompanying figure, describes a network in which each computer has equal responsibilities and capabilities. What is this kind of network called?
answer
P2P
question
For the best performance of a communications channel, which of the following should be true?
answer
bandwidth should be high, and latency low
question
Which of the following are radio waves that provide a high-speed signal transmission?
answer
microwaves
question
Many home users are connecting multiple computers and devices together into a system. What is the name for this system?
answer
home network
question
Which of the following can detect problems—such as why traffic is flowing slowly—on networks that use the TCP/IP protocol?
answer
packet sniffer software
question
On what kind of network, such as that illustrated in the accompanying figure, do one or more computers act as a server and the other computers on the network request services from the server?
answer
client/server
question
Which of the following is true of DSL?
answer
It is a popular digital line alternative for the small business or home user.
question
Which of the following is a LAN that uses no physical wires?
answer
WLAN
question
On a network such as the one illustrated in the accompanying figure, what kind of computer controls access to the hardware, software, and other resources on the network and provides a centralized storage area for programs, data, and information?
answer
host
question
Which of the following is a communications device that connects multiple computers together and transmits data to its correct destination on a network?
answer
router
question
Which of the following is a simple, inexpensive network that typically connects fewer than 10 computers?
answer
peer-to-peer network
question
On a network such as the one illustrated in the accompanying figure, some servers perform a specific task and can be placed with other servers to perform multiple tasks. What are these kind of servers call?
answer
dedicated
question
Which of the following defines how a network uses close-range radio signals to communicate between two devices or objects equipped with this technology?
answer
NFC