Deck 5: Local Area Networks

Question 1

In the accompanying figure,the item on the right can be installed in an expansion slot inside the system unit of a desktop computer.

Answer 1

True

Question 2

Most routers supply a WAN port designed for an Internet connection.

Answer 2

True

Question 3

In the accompanying figure,the networks that don't have an icon of a lock next to them aren't secured,and are open targets for hackers to steal data,spread viruses,and create a launching pad for spam.

Answer 3

True

Question 4

A cryptographic algorithm is a word,number,or phrase that must be known to encrypt or decrypt a message.

Question 5

IP addresses can be assigned by ISPs or system managers.

Question 6

Windows automatically senses nearby networks and displays their SSIDs.

Question 7

In the early years of personal computers,networks were plentiful.

Question 8

A packet always travels from the source directly to the destination,never traveling through intermediate routing devices.

Question 9

WPA2 makes sure that packets have not been intercepted or tampered with in any way.

Question 10

MAC addresses are used for some low-level network functions and can also be employed to establish network security.

Question 11

The wave on the bottom in the accompanying figure depicts a digital signal.

Question 12

The wave on the top in the accompanying figure depicts an analog signal.

Question 13

A transceiver is a combination of a transmitter and a receiver.

Question 14

In the accompanying figure,the item on the left simply plugs into a serial port on the outside of the system unit.

Question 15

In the accompanying figure,the item on the left can be used with a notebook or desktop computer.

Question 16

Microwaves cannot be aimed in a single direction and have less carrying capacity than radio waves.

Question 17

A process called handshaking allows two communications devices on a network to negotiate their communications protocols.

Question 18

A WAN provides connectivity within a limited geographical area,often within a single building.

Question 19

Bluetooth is often used to connect workstations to a LAN.

Question 20

A gateway joins two different types of networks.

Question 21

The process of converting ciphertext into plaintext is called encryption._________________________

Question 22

A ____ is a public high-speed network capable of voice and data transmission within a range of about 50 miles.

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

Question 23

A wireless ad hoc network uses a centralized broadcasting device,such as a wireless access point or router._________________________

Question 24

Data in a(n)wired network travels without the use of network cables._________________________

Question 25

Wi-Fi signals cannot be disrupted by interference from devices such as microwave ovens,cordless telephones,and baby monitors._________________________

Question 26

A more efficient alternative to packet switching is shown in the accompanying figure._________________________

Question 27

The Internet is the world's largest example of a(n)LAN._________________________

Question 28

A ____ is a term sometimes used to refer to the interconnection of personal digital devices or consumer electronics within a range of about 30 feet and without the use of wires or cables.

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

Question 29

A storage device that directly connects to a network is called network peripheral storage._________________________

Question 30

In the accompanying figure,IWC-guest is a(n)secure network._________________________

Question 31

When network discovery is turned on in a device like the one shown in the accompanying figure,any Wi-Fi enabled device within range of your network can see its URL._________________________

Question 32

If you are using a file server without its own keyboard or monitor,server configuration software is accessible using a(n)browser._________________________

Question 33

A LAN would be used to ____.

A) connect personal computers within a very limited geographical area, such as a single building
B) connect several smaller networks together
C) provide high-speed connectivity for a metropolitan area
D) connect devices over a large geographical area

Question 34

Which of the following is NOT a type of network device?

A) hub
B) switch
C) workstation
D) router

Question 35

High-bandwidth communications systems,such as cable TV and DSL,are sometimes referred to as peakband._________________________

Question 36

The best-known communications protocol is probably SMTP,which regulates Internet data transport._________________________

Question 37

Which of the following,if networked,can be accessed by an authorized LAN user?

A) scanners
B) high-capacity storage devices
C) photo printers
D) all of the above

Question 38

Microwaves are electromagnetic signals that can be aimed in a single direction and have more carrying capacity than radio waves._________________________

Question 39

In the accompanying figure,the lock icon indicates a network secured with wired encryption._________________________

Question 40

Public key encryption uses one key to encrypt a message and another key to decrypt it._________________________

Question 41

To connect to a LAN,a computer requires ____.

A) a peer-to-peer network
B) network attached storage
C) a network interface card
D) a client

Question 42

Two devices on a network might have to negotiate their communications protocols through a process called ____.

A) handshaking
B) synchronization
C) realization
D) introduction

Question 43

In the technology referred to as ____,a message is divided into several parcels that can be routed independently to their destination.

A) packet switching
B) handshaking
C) circuit switching
D) protocol

Question 44

A wired network is one that uses ____ to connect network devices.

A) NICs
B) radio frequency waves
C) cables
D) infrared light

Question 45

Dial-up Internet access is an example of a(n)____ communications system.

A) broadband
B) fireband
C) narrowband
D) Internet 2

Question 46

Most wireless networks transport data as ____ signals.

A) infrared
B) satellite
C) microwave
D) RF (radio frequency)

Question 47

The original Ethernet standard carried data over a coaxial cable bus topology at ____.

A) 10 Mbps
B) 100 Mbps
C) 10 Gbps
D) 100 Gbps

Question 48

Ethernet is a wired technology that is defined by ____ standards.

A) IEEE 802.3u
B) IEEE 802.3
C) IEEE 802.3ba
D) IEEE 802.3ae

Question 49

A protocol known as ____ is designed to automatically distribute IP addresses.

A) DHCP
B) packet switching
C) CSMA/CD
D) a piconet

Question 50

Ethernet networks ____.

A) are difficult to implement, manage, and maintain
B) use a nonproprietary technology, making Ethernet equipment available from a variety of vendors
C) do not offer much flexibility in network design
D) are not compatible with Wi-Fi wireless networks

Question 51

The telephone system uses a technology called ____,which establishes a dedicated,private link between telephones for the duration of a call.

A) packet switching
B) circuit switching
C) bus switching
D) ring switching

Question 52

A ____ is a physical path or a frequency used for signal transmissions.

A) logical channel
B) communications channel
C) connecting link
D) node link

Question 53

Ethernet is easy to ____.

A) implement
B) maintain
C) manage
D) All of the above

Question 54

On an Ethernet,a ____ is broadcast to every device but is accepted only by the device to which it is addressed.

A) code
B) packet
C) band
D) node

Question 55

The most important network device is a ____.

A) router
B) switch
C) hub
D) wireless access point

Question 56

High-bandwidth communications systems are sometimes referred to as ____.

A) quickband
B) broadband
C) fireband
D) Internet 2

Question 57

What is the IEEE designation for the Gigabit Ethernet standard?

A) IEEE 802.3
B) IEEE 802.3ae
C) IEEE 802.3u
D) IEEE 802.3z

Question 58

Which of the following is a disadvantage of using a wireless network when compared to a wired network?

A) speed
B) range
C) security
D) all of the above

Question 59

A network ____ usually contains a computer,networked peripheral,or network device.

A) node
B) file
C) application
D) index

Question 60

Which of the following is NOT an advantage of using a wired network?

A) Increased security
B) Fast access
C) Simple to configure
D) Unlimited mobility

Question 61

Which of the following is NOT true about Wi-Fi standards?

A) IEEE 802.11b is the original standard.
B) All of the standards are cross compatible.
C) IEEE 802.11a is not compatible with 802.11b.
D) IEEE 802.11n is faster than, but compatible with, b and
G)

Question 62

Wi-Fi encompasses all of the following standards EXCEPT ____.

A) 802.11b
B) 802.11g
C) 802.11n
D) 802.11p

Question 63

A ____ is a network device that extends the range of a network by restoring signals to maximum strength and retransmitting them.

A) bridge
B) hub
C) switch
D) repeater

Question 64

In a wireless ____ network,devices broadcast directly to each other.

A) ad-hoc
B) infrastructure
C) embedded
D) SSID

Question 65

A ____ is a network device that intelligently facilitates communication among multiple devices on a network.

A) bridge
B) hub
C) switch
D) repeater

Question 66

Computers without Wi-Fi or those with slow Wi-Fi protocols can be upgraded using a Wi-Fi ____.

A) FireWire
B) adapter
C) port
D) cable

Question 67

The most popular wireless LAN technology is ____.

A) WUSB (Wireless USB)
B) Wi-Fi
C) Bluetooth
D) WiMAX

Question 68

Which of the following is NOT true?

A) When lots of computer game players compete against each other over a LAN, a fast, wired network is desirable.
B) Speed increases as signal strength decreases.
C) On wireless connections, signal strength varies depending on distance from the transmitter and obstacles that might interfere with the signal.
D) Despite interference, wireless networks are fast enough for most applications.

Question 69

In what mode can two Bluetooth devices find each other and exchange passkeys?

A) distance
B) locational
C) transmission
D) discovery

Question 70

Wireless signal range can be limited by ____.

A) the type of signal
B) the physical environment
C) transmitter strength
D) all of the above

Question 71

In some versions of Mac OS,wireless networking is handled by an Apple rendition of Wi-Fi called ____.

A) Network Neighborhood
B) AirPort
C) Embedded Networking
D) SSID

Question 72

A ____ is a network device that extends a wired network by adding additional ports.

A) bridge
B) hub
C) switch
D) repeater

Question 73

Which of the following is true about Bluetooth?

A) It requires cables to connect electronic devices.
B) It has a very long transmission range of over 500 feet.
C) It is used exclusively to connect workstations to a LAN.
D) It forms networks automatically when two or more devices in discovery mode are within range.

Question 74

Most routers ship with a(n)____ predefined by the manufacturer.

A) gateway
B) ISP
C) SSID
D) topology

Question 75

To see the hardware listings in order to determine if your Windows computer has Wi-Fi capability,use the Start menu to access ____ and look for a wireless or WLAN adapter.

A) Network Neighborhood
B) Wi-Fi Manager
C) Device Manager
D) Network Infrastructure Utility

Question 76

Before using your network,you should adjust the configuration settings of the ____ to make sure your network is secure.

A) gateway
B) router
C) bridge
D) repeater

Question 77

____ is a wireless MAN or WAN technology commonly used for fixed Internet access.

A) FCC
B) WiMAX
C) Bluetooth
D) Ethernet

Question 78

A Wi-Fi network transmits data as radio waves over ____ frequencies.

A) 2.4 MHz or 5.8 MHz
B) 1.2 MHz or 2.4 MHz
C) 2.4 GHz or 5.8 GHz
D) 1.2 GHz or 2.4 GHz

Question 79

____ technology improves the speed and range of a LAN by using two or more antennae to essentially send multiple sets of signals between network devices.

A) WiMAX
B) MIMO
C) Zigbee
D) MAN

Question 80

In areas where there are overlapping wireless networks,such as in a city or on a college campus,____ help you log in to the right network,rather than a network run by a hacker who will try to suck important information off your computer as soon as you connect.

A) topographical maps
B) routers
C) ISPs
D) SSIDs