Introduction to Computers CH 10

Which of the following defines guidelines that specify the way computers access the medium to which they are attached, the types of the speeds used on different types of networks, and the types of physical cable and/or the wireless technology used?
Network standard
What is the maximum transfer transmission rate for Bluetooth?
24 Mbps
You want to use the UMB cellular transmission standard on your new mobile phone, Which standard will you use?
4G
Which of the following is a LAN that uses no physical wires?
WLAN
Which of the following is NOT true of Wi-Fi?
It is not, In open or outdoor areas free from interference computers or devices should be within 300 feet of each other to be able to communicate.
Which of the following enables a computer or device that does not have a built-in networking capability to access a network?
NIC
Which of the following technologies is your new inventory tracking system at your small business most likely to use?
UWB
What is another term for services that control access to the hardware, software, and other network resources?
Host computers
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
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 an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?
Microwave station
What kind of communications device sends and receives data and information to and from a digital line, such as IDSN and cable?
A modem
What type of media transmits multiple signals simultaneously?
Broadband
Which of the following technologies is your new wireless headset most likely to use?
Bluetooth
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
A dial-up modem connected to a sending computer converts the computer’s digital signals into analog signals. T/F
True
Users connected to a network have access to software on the network. T/F
True
Data transmitted on a ring network like the one shown in the accompanying figure travels from device to device around the entire ring, in BOTH directions. T/F
False, one direction.
In a fiber-optic cable, each strand, called an optical fiber, is as thin as a human hair. T/F
True
With FTTP service, an optical terminal at your location receives the signals, and transfers them to a router connected to a computer. T/F
True
Which of the following terms identifies any network based on the 802.11 family of standards?
Wi-Fi
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
Digital communications describes a process in which two or more computers or devices transfer all of the following EXCEPT ____.
Networks
Which of the following is the data transfer rate equivalent to one million bits per second?
Mbps
Which of the following is a transmission media on which data, instructions, or information travel?
Communications channel
Which network type connects each computer and device to a central device?
Star network
What is the purpose of hubs and switches?
Not “to translate analog signals into digital signals”.
Network servers and web servers are examples of what type of server?
Dedicated servers
What is the definition of a protocol, as it applies to networks?
Not “the rules governing acceptable network use by employees or other users”.
Which of the following has the fastest transfer rate?
FTTP, unless ATM is an option.
Many home users are connecting multiple computers and devices together into a system. What is the name for this system?
Home network
In reference to computer communications, what does the term noise mean?
Electrical disturbances
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
Which of the following offers an alternative to infrared communications with high bandwidth transmissions?
Bluetooth
You love to take pictures of your family. What standard do you use to print pictures directly from your camera?
UWB
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
A star network consists of a single central cable, to which all computers and other devices connect. T/F
False, Bus Network
A DSL modem converts digital signals to analog signals and vice versa so that data can travel along an analog phone line. T/F
True
Although it can connect any number of computers, a client/server network typically provides an efficient means to connect 10 or fewer computers. T/F
False
An extranet essentially is a small version of the Internet that exists within an organization. T/F
False
Some mobile users have a wireless modem that uses a mobile phone provider’s network to connect to the Internet wirelessly from a computer or other mobile device. T/F
True
You are purchasing a new mobile phone, and are learning about categories of cellular transmissions. You ask the sales person what the “G” stands for in the categories 1G, 2G, 3G, 4G, what does he reply?
Generation
What is a sending device?
A device that initiates an instruction to transmit data, instructions, or information.
What is an NIC?
A communications device that enables a computer or device that does not have a built-in networking capability to access a network.
How many feet can the range of Bluetooth devices be extended with additional equipment?
325
Which of the following are radio waves that provide a high-speed signal transmission?
Microwaves
Which of the following is a 4G standard?
LTE
Which of the following is not an application of communications satellite technology?
Fixed wireless
Transmission from a satellite to an earth-based station is called an uplink. T/F
False
For radio transmission, a transmitter is needed to send the broadcast radio signal and a receiver to accept it. T/F
True
ISDN is more widely used now than in the past. T/F
False
Each token ring network has several tokens. T/F
False
On a ring network if the hub fails the entire network is inoperable until the hub is repaired. T/F
False
A WLAN cannot communicate with a wired LAN. T/F
False
One of the more widely used transmission media for network cabling and landline phone systems is twisted-pair cable. T/F
True
Data, instructions, and information travel along transmission media in either analog or digital form, depending on the transmission media. T/F
True
A MAN usually is managed by a consortium of users or by a single network provider that sells the service to the users. T/F
True
What does EFT stand for?
Electronic funds transfer
On a STAR network, if one node fails that isn’t one that’s providing services to other nodes on the network, what happens?
Only that node is affected
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
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 technologies is your new remote control most likely to use?
IrDA
Which of the following communications technologies does not use broadcast radio signals?
IR
Which of the following did Sven Mattisson and Jaap Haartsen invent?
Bluetooth
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
Which of the following is not an example of a dedicated line?
Dial-up