Deck 4: Networks

Question 1

Wide-area networks have a large capacity, and they typically use a single communications channel.

Answer 1

False

Question 2

Digital signals have two parameters: frequency and amplitude.

Answer 2

False

Question 3

Systems that use digital subscriber lines (DSL)do not require modems.

Answer 3

False

Question 4

The Internet is a wide area network.

Question 5

Peer-to-peer processing means each computer acts as both a client and a server.

Question 6

Cable media use wires or cables to transmit data and information.

Question 7

Ethernet is a common LAN protocol.

Question 8

The U.S.public telephone system was designed as an analog network to carry voice signals.

Question 9

Cladding is the coating that surrounds fiber-optic cables and prevents light from leaking out of the fiber.

Question 10

Voice and data communications are becoming faster but slightly more expensive.

Question 11

Digital signals are continuous waves that transmit information by altering the characteristics of the waves.

Question 12

IPv6 allows devices to more quickly connect to the Internet than IPv4.

Question 13

LANs typically contain multiple WANs.

Question 14

Currently, ATM networks operate only on fiber-optic cable.

Question 15

Digital signals are discrete pulses that are either on or off.

Question 16

A local area network connects two or more communicating devices in a limited geographical area.

Question 17

Network interface cards are special adapters that link an individual device to the communications medium on a local area network.

Question 18

The World Wide Web is synonymous with the Internet.

Question 19

The network interface card typically houses the LAN's network operating system.

Question 20

Twisted-pair wire is the least-used form of communications wiring.

Question 21

Industry-wide portals are intended for broad audiences and offer fairly routine content.

Question 22

Commercial portals are intended for broad audiences and offer fairly routine content.

Question 23

Intranets support discovery, communication, and collaboration inside an organization.

Question 24

A major problem of the discovery applications of networks is the huge amount of information available.

Question 25

Uniform resource locators (URLs)are software applications through which users access the Web.

Question 26

Crowdsourcing refers to outsourcing a task to an undefined, generally large group of people in the form of an open call.

Question 27

An Internet service provider is a company that offers Internet connections for a fee.

Question 28

The Internet is a global network of computer networks.

Question 29

The quality of automatic translation of Web pages is usually just as good as human translation.

Question 30

The World Wide Web is a system with universally accepted standards for storing, retrieving, formatting, and displaying information via a client/server architecture.

Question 31

Uniform resource locators (URLs)point to the address of a specific resource or site on the Web.

Question 32

VoIP converts analog signals to digital ones.

Question 33

The rightmost part of an Internet name is the top-level specification, or the zone.

Question 34

Extranets offer limited accessibility to the intranets of participating companies.

Question 35

An intranet is a network that uses Internet technologies and is designed to serve the information needs of a single organization.

Question 36

A domain name is the official name assigned to an Internet site, consisting of multiple parts, separated by dots, which are translated from right to left in locating the site.

Question 37

The hypertext transport protocol (HTTP)is the communications standard used to transfer pages across the World Wide Web portion of the Internet.

Question 38

Metasearch engines search several engines at once and integrate the findings of the various search engines.

Question 39

An extranet is a network that uses Internet technologies and is designed to serve the information needs of a single organization.

Question 40

Internet kiosks are computer terminals located in public places like libraries and airports.

Question 41

A(n)_____ connects two or more devices in a limited geographical area.

A)Local area network
B)Wide-area network
C)Personal area network
D)Enterprise network
E)Value added network

Question 42

All of the following statements concerning wide-area networks are true except:

A)They are provided by individual companies.
B)They have large capacity.
C)They cover large geographical areas.
D)They combine multiple communications channels.
E)The Internet is an example of a wide-area network.

Question 43

Which of the following is not a component of a local area network?

A)File server
B)Client computers
C)Bridge
D)Network interface cards
E)All of these

Question 44

Which of the following is NOT a reason networks are essential?

A)They offer a company flexibility.
B)They allow companies to share resources.
C)Computers typically work in isolation.
D)Employees are geographically dispersed.

Question 45

_____________ usually spans a city.

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

Question 46

______________ refers to the transmission capacity of a network.

A)Bandwidth
B)Bandlength
C)Broadband
D)Narrowband

Question 47

With Voice-over-IP, every call opens up a dedicated circuit for the duration of the call.

Question 48

Qwiki produces a real-time search result in multimedia form.

Question 49

Which of the following are advantages of computer networks?

A)They enable organizations to be more flexible.
B)They enable companies to share hardware, computer applications, and data.
C)They enable geographically dispersed employees to work together.
D)They provide a critical link between businesses and their customers.
E)All of these

Question 50

From largest to smallest, what is the correct order for the types of networks?

A)WAN, MAN, PAN, LAN
B)MAN, WAN, LAN, PAN
C)WAN, MAN, LAN, PAN
D)MAN, WAN, PAN, LAN

Question 51

A _____ connects dissimilar networks.

A)Router
B)Network interface card
C)Bridge
D)Gateway
E)File server

Question 52

E-learning is conducted only in virtual classrooms, where all coursework is completed online.

Question 53

Every device in the ________ has a NIC that allows the device to physically connect to the network's communication medium.

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

Question 54

Electronic mail is the largest-volume application running over the Internet.

Question 55

A _____ sends messages through several connected LANs or to a wide-area network.

A)Router
B)Network interface card
C)Bridge
D)Gateway
E)File server

Question 56

The components of a local area network include which of the following?

A)File server
B)Client computers
C)Wireline or wireless communications media
D)Network interface cards
E)All of these

Question 57

A _____ allows a device to physically connect to a local area network's communications medium.

A)File server
B)Network interface card
C)Network operating system
D)Communications channel
E)Gateway

Question 58

_____ refers to the range of frequencies available in any communications channel.

A)Protocol
B)Broadband
C)Capacity
D)Narrowband
E)Bandwidth

Question 59

Employees who telecommute have generally found that the experience enhances their careers.

Question 60

Virtual universities are online universities from which students take classes from home or at an off-site location, via the Internet.

Question 61

__________ is the most prevalent form of communications wiring.

A)Coaxial cable
B)Fiber-optic cables
C)Twisted-pair wire Wireless

Question 62

In order to ensure that computers developed by different manufacturers can communicate, _____ have been developed.

A)Protocols
B)Client/server architectures
C)WANs
D)Application software packages
E)Developmental architectures

Question 63

Which of the following is not a characteristic of twisted-pair wire?

A)Inexpensive
B)Easy to work with
C)Subject to interference from other electrical sources
D)Secure transmissions
E)None of these

Question 64

The _______________ layer of TCP/IP provides the addressing, routing, and packaging of data packets.

A)Application
B)Internet
C)Network interface
D)Transport

Question 65

Which transmission technology is an interface standard for transporting digital signals over fiber-optic lines that enables the integration of transmissions from multiple vendors?

A)Digital subscriber line
B)Asynchronous transfer mode
C)Synchronous optical network
D)T-carrier system
E)ISDN

Question 66

_____________ is a data transmission technology that uses packet switching and allows for almost unlimited bandwidth on demand.

A)Asynchronous Transfer Mode
B)Digital Subscriber Line
C)Synchronous Optical Network
D)T-Carrier System

Question 67

The cable medium with the highest bandwidth is:

A)Twisted-pair wire
B)Coaxial cable
C)Fiber-optic cable
D)Cellular radio
E)Copper cable

Question 68

Data are sent through a fiber-optic cable by a(n)_______.

A)Optical switch
B)Electromagnetic switch
C)Laser
D)Multiplexer
E)Optical modem

Question 69

_____ signals convey information in wave form, whereas _____ signals convey information in binary form.

A)Analog, packet
B)Analog, digital
C)Digital, packet
D)Digital, analog
E)Packet, analog

Question 70

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 the control of communications in a network.
C)A communications service for the connection of devices in a local area network.
D)The main communications channel in a wide-area network.
E)Synonymous with network interface card.

Question 71

Gal runs a music store.He has a desktop computer in the back room that acts as a server.He has a point-of-sale terminal that connects to the desktop.He also has a notebook (using in-store wireless access to the Internet)that can be carried around the store to look up current items in stock, or to search for items from one of his suppliers for special orders.Which type of network does Gal have?

A)Client-server
B)Mainframe-based
C)LAN
D)WAN
E)Peer-to-peer

Question 72

Which of the following is a disadvantage of twisted-pair wire?

A)Availability
B)Cost
C)Flexibility
D)Speed

Question 73

Some modems convert ________ to __________, which is called __________.

A)analog, digital, modulation
B)digital, analog, demodulation
C)analog, numbers, demodulation
D)digital, analog, modulation

Question 74

Which of the following is not a communications channel?

A)Fiber-optic cable
B)Satellite transmission
C)Twisted-pair wire
D)Integrated circuits
E)Cellular radio

Question 75

Which data transmission technology requires fiber-optic cable, can transmit up to 2.5 gigabits per second, and is more expensive than DSL?

A)Digital subscriber line
B)Asynchronous transfer mode
C)Synchronous optical network
D)T-carrier system
E)ISDN

Question 76

__________ operates on the same lines as telephones, and the Internet is always available.

A)Cable
B)Dial-up
C)DSL
D)Satellite

Question 77

_____ are hardware devices that support data transmission and reception across a telecommunications system.

A)Integrated services digital networks
B)Digital subscriber lines
C)Communications channels
D)Integrated circuits
E)Communications processors

Question 78

The function of _____ is to convert digital signals to analog signals and vice-versa.

A)Modems
B)Multiplexers
C)Front-end processors
D)Servers
E)Clients

Question 79

Which of the following is an advantage of coaxial cable?

A)Cost
B)Flexibility
C)Security
D)All of the above are advantages

Question 80

Which of the following is a digital transmission system that defines circuits that operate at different rates, all of which are multiples of the basic 64 Kbps used to transport a single voice call?

A)Digital subscriber line
B)Asynchronous transfer mode
C)Synchronous optical network
D)T-carrier system
E)ISDN