Deck 7: Telecommunications, the Internet, and Wireless Technology

Question 1

TCP refers to the Transmission Control Protocol (TCP),which is responsible for the delivery of packets and includes the disassembling and reassembling of packets during transmission.

Answer 1

False

Question 2

Telephone networks are fundamentally different from computer networks.

Answer 2

True

Question 3

A modem is a device that translates digital signals from a computer into analog form so that they can be transmitted over analog telephone lines.

Answer 3

True

Question 4

IP refers to the Internet Protocol (IP),establishes a connection between the computers,sequences the transfer of packets,and acknowledges the packets sent.

Question 5

Ethernet is the dominant LAN standard at the physical network level,specifying the physical medium to carry signals between computers;access control rules;and a standardized set of bits used to carry data over the system.

Question 6

A analog signal is a discrete,binary waveform,rather than a continuous waveform.

Question 7

Each computer on the network contains a network interface device called a network operating card (NOC).

Question 8

Pocket switching is a method of slicing digital messages into parcels called pockets,sending the pockets along different communication paths as they become available,and then reassembling the pockets once they arrive at their destinations.

Question 9

The most common LAN operating systems are Windows,Linux,and Novell.

Question 10

Increasingly,voice,video,and data communications are all based on Internet technology.

Question 11

A digital signal is represented by a continuous waveform that passes through a communications medium;analog signals are used for voice communication.

Question 12

Firms in the past used two fundamentally different types of networks: telephone networks and computer networks.

Question 13

Increasingly,voice and data communication as well as Internet access are taking place over broadband wireless platforms,such as cell phones,handheld digital devices,and PCs in wireless networks.

Question 14

A peer-to-peer network treats all processors equally and is used primarily in small networks with 10 or fewer users.

Question 15

In a bus topology,one station transmits signals,which travel in both directions along a single transmission segment.

Question 16

Sometimes LANs are described in terms of the way their components are connected together,or their topology.

Question 17

Packet switching makes much less efficient use of the communications capacity of a network.

Question 18

A local-area network (LAN)is designed to connect personal computers and other digital devices within a half-mile or 500-metre radius.

Question 19

Due to continuing telecommunications deregulation and information technology innovation,telephone and computer networks are slowly converging into a single digital network using shared Internet-based standards and equipment.

Question 20

Contemporary digital networks and the Internet are based on four key technologies: client/server computing,the use of packet switching,the development of widely used communications standards and PC operating systems.

Question 21

Wide-area networks (WAN)is a network that spans a metropolitan area,usually a city and its major suburbs.

Question 22

A protocol is a standard set of rules and procedures for the control of communications in a network.

Question 23

Central large mainframe computing has largely replaced client/server computing.

Question 24

Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire.

Question 25

An Internet service provider (ISP)is a commercial organization with a temporary connection to the Internet that sells permanent connections to retail subscribers.

Question 26

The domain name is the English-like name that corresponds to the unique 32-bit numeric IP address for each computer connected to the Internet.

Question 27

Twisted wire consists of strands of copper wire twisted in pairs and is an older type of transmission medium.

Question 28

In a client/server network,a network server provides every connected client with an address so it can be found by others on the network.

Question 29

An NOS must reside on a dedicated server computer in order to manage a network.

Question 30

In a ring topology,one station transmits signals,which travel in both directions along a single transmission segment.

Question 31

A hub is a networking device that connects network components and are used to filter and forward data to specified destinations on the network.

Question 32

The range of frequencies that can be accommodated on a particular telecommunications channel is called its bandwidth.

Question 33

Digital subscriber line (DSL)provided by cable television vendors use digital cable coaxial lines to deliver high-speed Internet access to homes and businesses.

Question 34

Circuit switching makes much more efficient use of the communications capacity of a network than does packet switching.

Question 35

Microwave systems,both terrestrial and celestial,transmit high-frequency radio signals through the atmosphere and are widely used for high-volume,long-distance,point-to-point communication.

Question 36

Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms.

Question 37

Fibre-optic cable is more expensive and harder to install than wire media.

Question 38

The number of cycles per second that can be sent through any telecommunications medium is measured in kilobytes.

Question 39

Metropolitan-area network (MAN)span broad geographical distances-entire regions,states,continents,or the entire globe.

Question 40

To connect two computers together in the same office,you must have a computer network.

Question 41

Every computer on the Internet is assigned the same Internet Protocol (IP)address,which currently is a 32-bit number represented by four strings of numbers ranging from 0 to 255 separated by periods.

Question 42

Web 2.0 is the collaborative effort led by the World Wide Web Consortium to add a layer of meaning atop the existing Web to reduce the amount of human involvement in searching for and processing Web information.

Question 43

The telephone system is an example of a ________ network.

A)peer-to-peer
B)wireless
C)packet-switched
D)circuit-switched

Question 44

In a few years,more than 80 percent of the Internet users in North America will use smartphones and mobile netbooks to access the Internet.

Question 45

VoIP technology delivers video information in digital form using packet switching.

Question 46

Network owners believe regulation to enforce net neutrality will impede competitiveness by stifling innovation,discouraging capital expenditures for new networks,and curbing their networks' ability to cope with the exploding demand for Internet and wireless traffic.

Question 47

The Aviation layer is responsible for providing the Application layer with communication and packet services.

Question 48

The Transport Interface layer is responsible for placing packets on and receiving them from the network medium,which could be any networking technology.

Question 49

The Internet is based on which three key technologies?

A)TCP/IP,HTML,and HTTP
B)TCP/IP,HTTP,and packet switching
C)Client/server computing,packet switching,and the development of communications standards for linking networks and computers
D)Client/server computing,packet switching,and HTTP

Question 50

RFID has been exceptionally popular because of its low implementation costs.

Question 51

WiMax has a wireless access range of up to 300 feet.

Question 52

Newsgroups are worldwide discussion groups posted on Internet electronic bulletin boards on which people share information and ideas on a defined topic,such as radiology or rock bands.

Question 53

Canadian Internet service lags behind that of many other nations in overall speed,cost,and quality of service,adding credibility to this argument.

Question 54

Wi-Fi enables users to freely roam from hotspot to hotspot even if the hotspot is using different Wi-Fi network services.

Question 55

The success of the Internet is in part due to its design as an infinitely scalable network capable of handling millions of users.

Question 56

Proponents of net neutrality also argue that a neutral Internet encourages everyone to innovate without permission from the phone and cable companies or other authorities,and this level playing field has spawned countless new businesses.

Question 57

The method of slicing digital messages into parcels,transmitting them along different communication paths,and reassembling them at their destinations is called

A)multiplexing.
B)packet switching.
C)packet routing.
D)ATM.

Question 58

A device that acts as a connection point between computers and can filter and forward data to a specified destination is called a

A)hub.
B)switch.
C)router.
D)NIC.

Question 59

Internet2 and Next-Generation Internet (NGI)are consortia representing 200 universities,private businesses,and government agencies in the United States working on a new,robust,high-bandwidth version of the Internet.

Question 60

Search engines attempt to solve the problem of finding useful information on the Web nearly instantly and,arguably,they are the "killer app" of the Internet era.

Question 61

Digital subscriber lines

A)operate over existing telephone lines to carry voice,data,and video.
B)operate over coaxial lines to deliver Internet access.
C)are very-high-speed data lines typically leased from long-distance telephone companies.
D)have up to twenty-four 64-Kbps channels.

Question 62

A network that covers entire geographical regions is most commonly referred to as a(n):

A)local area network.
B)intranet.
C)peer-to-peer network.
D)wide area network.

Question 63

To use an analog telephone system for sending digital data,you must us

A)a modem.
B)a router.
C)DSL.
D)twisted wire.

Question 64

The four layers of the TCP/IP reference model are

A)physical layer,application layer,transport layer,and the network interface layer.
B)physical layer,application layer,Internet layer,and the network interface layer.
C)application layer,transport layer,Internet layer,and the network interface layer.
D)application layer,hardware layer,Internet layer,and the network interface layer.

Question 65

Which of the following is NOT a characteristic of packet switching?

A)Packets travel independently of each other.
B)Packets are routed through many different paths.
C)Packet switching requires point-to-point circuits.
D)Packets include data for checking transmission errors.

Question 66

Which type of network would be most appropriate for a business that comprised three employees and a manager located in the same office space,whose primary need is to share documents?

A)wireless network in infrastructure mode
B)domain-based LAN
C)peer-to-peer network
D)campus area network

Question 67

________ work(s)by using radio waves to communicate with radio antennas placed within adjacent geographic areas.

A)Cell phones
B)Microwaves
C)Satellites
D)WANs

Question 68

A network that spans a city,and sometimes its major suburbs as well,is called a

A)CAN.
B)MAN.
C)WAN.
D)LAN.

Question 69

Which signal types are represented by a continuous waveform?

A)laser
B)optical
C)digital
D)analog

Question 70

In a telecommunications network architecture,a protocol is

A)a device that handles the switching of voice and data in a local area network.
B)a standard set of rules and procedures for control of communications in a network.
C)a communications service for microcomputer users.
D)the main computer in a telecommunications network.

Question 71

The total amount of digital information that can be transmitted through any telecommunications medium is measured in

A)bps.
B)Hertz.
C)baud.
D)gigaflops.

Question 72

All network components connect to a single hub in a ________ network.

A)star
B)bus
C)domain
D)peer-to-peer

Question 73

Which type of network is used to connect digital devices within a half-mile or 500-metre radius?

A)microwave
B)LAN
C)WAN
D)MAN

Question 74

In a bus network

A)signals are broadcast to the next station.
B)signals are broadcast in both directions to the entire network.
C)multiple hubs are organized in a hierarchy.
D)messages pass from computer to computer in a loop.

Question 75

Bandwidth is the

A)number of frequencies that can be broadcast through a medium.
B)number of cycles per second that can be sent through a medium.
C)difference between the highest and lowest frequencies that can be accommodated on a single channel.
D)total number of bytes that can be sent through a medium per second.

Question 76

The most common ethernet topology is

A)bus.
B)star.
C)ring.
D)mesh.

Question 77

Which type of network treats all processors equally,and allows peripheral devices to be shared without going to a separate server?

A)peer-to-peer
B)wireless
C)LAN
D)ring

Question 78

T lines

A)operate over existing telephone lines to carry voice,data,and video.
B)operate over coaxial lines to deliver Internet access.
C)are very-high-speed data lines typically leased from long-distance telephone companies.
D)have up to twenty-four 64-Kbps channels.

Question 79

Which protocol is the Internet based on?

A)TCP/IP
B)FTP
C)packet-switching
D)HTTP

Question 80

In TCP/IP,IP is responsible for

A)disassembling and reassembling of packets during transmission.
B)establishing an Internet connection between two computers.
C)moving packets over the network.
D)sequencing the transfer of packets.