Deck 5: Local Area Networks

Question 1

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

Answer 1

False

Question 2

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

Answer 2

True

Question 3

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

Answer 3

True

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

Windows automatically senses nearby networks and displays their SSIDs.

Question 12

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

Question 13

Bluetooth is often used to connect workstations to a LAN.

Question 14

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

Question 15

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

Question 16

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.

Question 17

A gateway joins two different types of networks.

Question 18

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

Question 19

IP addresses can be assigned by ISPs or system managers.

Question 20

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

Question 21

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

Question 22

A ____ is NOT a type of network device.

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

Question 23

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

Question 24

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

Question 25

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

Question 26

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

Question 27

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 28

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

Question 29

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 30

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

Question 31

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

Question 32

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 33

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 34

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

Question 35

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

Question 36

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

Question 37

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

Question 38

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

Question 39

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

Question 40

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

Question 41

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 42

____ 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 43

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

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

Question 44

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 45

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 46

Most wireless networks transport data as ____ signals.

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

Question 47

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

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

Question 48

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 49

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

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

Question 50

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

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

Question 51

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 52

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 53

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

A) IEEE 802.2
B) IEEE 802.3
C) IEEE 802.7
D) IEEE 802.11

Question 54

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 55

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

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

Question 56

The IEEE designation for the Gigabit Ethernet standard is ____.

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

Question 57

The most important network device is a ____.

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

Question 58

Ethernet is easy to ____.

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

Question 59

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 60

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 61

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

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

Question 62

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

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

Question 63

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 64

____ 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 65

Legacy equipment without Wi-Fi can be outfitted with a Wi-Fi adapter that plugs into a(n)____.

A) USB port
B) internal expansion slot
C) either a.or b.
D) neither a.nor b.

Question 66

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 67

To stay with the current Wi-Fi standard,make sure your device is compatible with ____.

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

Question 68

The configuration settings are stored in the router's ____ memory.

A) EEPRAM
B) EEPROM
C) IEEROM
D) IEERAM

Question 69

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

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

Question 70

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

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

Question 71

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 72

Legacy equipment without Wi-Fi can be upgraded using a Wi-Fi ____.

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

Question 73

Devices with one or more antennas use ____ technology to boost signals and spread them more evenly over the signal range.

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

Question 74

A Wi-Fi device ____.

A) transmits data as radio waves
B) is compatible with Ethernet
C) both a.and b.
D) neither a.nor b.

Question 75

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

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

Question 76

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

Question 77

A true statement about Bluetooth is ____.

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 78

To access your router's configuration utility,open a browser and enter the router ____.

A) encryption key
B) serial number
C) address
D) password

Question 79

The most popular wireless LAN technology is ____.

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

Question 80

In ____ mode two Bluetooth devices can find each other and exchange passkeys.

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