For best performance of a communications channel, which of the following should be true
bandwidth should be high and latency low
Who invented the Ethernet
Robert Metcalfe
Which of the following is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?
microwave station
Which of the following can be avoided if a computer or mobile device has a motherboard that integrates networking capability
NIC
Microwave transmission involves sending signals from one microwave station to another. What is this often called
fixed wireless
Which of the following is a wireless transmission medium that distributes radio signals through the air over long distances
broadcast radio
How many feet can the range of Bluetooth devices be extended with additional equipment?
325
Which of the following has the fastest transfer rate
FTTP
As shown in the accompanying figure, what is the term for a network that covers a large geographic area, such as a city, country, or the world, using a variety of wired and wireless transmission media
wide area network (WAN)
Which of the following is the least likely technology PANs would use
peer-to-peer
Which of the following is a LAN that uses no physical wires
WLAN
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
Ethernet
Which of the following is a central communications device that allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network
wireless access point
The amount of data, instructions, and information that can travel over a communications channel sometimes is called which of the following
bandwidth
Which of the following is not an application of communications satellite technology
fixed wireless
Which of the following has the fastest transfer rate
ATM
Which of the following is true of the installation of a network like the one shown in the accompanying figure
It can span a larger distance than a bus network, but it is more difficult.
Which of the following can detect problems—such as why traffic is flowing slowly—on networks that use the TCP/IP protocol
packet sniffer software
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
star network
Many home users are connecting multiple computers and devices together into a system. What is the name for this system
home network
Which of the following terms identifies any network based on the 802.11 family of standards
Wi-Fi
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
P2P
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
client/server
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
coaxial
Which of the following is the maximum transfer transmission rate for communications satellites
2.56 Tbps
Which of the following terms is an electrical disturbance that can degrade communications
noise
Which of the following terms is the time it takes a signal to travel from one location to another on a network
latency
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
dedicated
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
network architecture
Which of the following is a simple, inexpensive network that typically connects fewer than 10 computers
peer-to-peer network
Which of the following is true of DSL
It is a popular digital line alternative for the small business or home user.
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
communications
Which of the following is true of broadcast radio with regard to physical transmission media
It is slower and more susceptible to noise.
Which of the following is a transmission media on which data, instructions, or information travel
communications channel
Which of the following enables a computer or device that does not have built-in networking capability to access a network
NIC
As shown in the accompanying figure, which of the following kinds of networks is a network topology in which a cable forms a closed loop, with all computers and devices arranged along it
ring
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
only that node is affected
Which of the following defines guidelines that specify the way computers access the medium to which they are attached, the type(s) of medium used, the speeds used on different types of networks, and the type(s) of physical cable and/or the wireless technology used
network standard
Digital communications describes a process in which two or more computers or devices transfer all of the following EXCEPT ____.
networks
How many wired and/or wireless computers and mobile devices might a router be able to connect
more than 200
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
host
Which of the following is the greatest problem with regard to a bus network
The bus itself might become inoperable.
Which of the following is the data transfer rate equivalent to one million bits per second
Mbps
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
broadband
Which of the following defines how a network uses close-range radio signals to communicate between two devices or objects equipped with this technology
NFC
Which of the following are radio waves that provide a high-speed signal transmission
microwaves
Which of the following is a communications device that connects multiple computers together and transmits data to its correct destination on a network
router
Which of the following did Sven Mattisson and Jaap Haartsen invent
Bluetooth
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
router
What is the maximum transfer transmission rate for Bluetooth
24 Mbps
x

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