Deck 5: Lans and Wlans

Question 1

Using a hub instead of a switch can increase a network's performance and security because data isn't flowing indiscriminately to every device on the network.

Answer 1

False

Question 2

Packets always travel from the source directly to their destination.

Answer 2

False

Question 3

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

Answer 3

False

Question 4

The waveform shown in the figure above is a digital waveform.

Question 5

The waveform shown in shown in the figure above is a digital waveform.

Question 6

Adapters, like the one shown in the figure above, simply plug into a serial port on the outside of your computer s system unit.

Question 7

A WAN provides connectivity within a limited geographical area, usually spread over several buildings.

Question 8

Two similar networks can be connected by a device called a gateway, which simply transfers data without regard to its format.

Question 9

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

Question 10

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

Question 11

A process called handshaking helps two communications devices negotiate and establish communications.

Question 12

Wireless LANs are easy to install, and it is typically not necessary to secure them from intrusions.

Question 13

A hub is designed to link two or more nodes of a wired network.

Question 14

The device used to connect your home LAN to the Internet is a type of gateway.

Question 15

In a client/server network, a server is the most important resource.

Question 16

Use the same precautions with your network cables as you would with power cords.

Question 17

A ring topology connects all devices in a circle, with each device having exactly two neighbors.

Question 18

Because network technology continues to evolve, it is a fairly unstable concept.

Question 19

Assigned IP addresses are semi-permanent and stay the same every time you boot your computer.

Question 20

You must have a static IP address to access the Internet.

Question 21

For security reasons, it is not advisable to allow shared access to the root directory of the C drive on your computer.

Question 22

The Internet is the largest example of a(n) LAN .

Question 23

1.
2.
3.
In the figure above, the network marked 2 is configured in a(n) bus topology.

Question 24

Wireless network speed and range are actual maximums.

Question 25

Telephone signals are transmitted in the 12,000 Hz range.

Question 26

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

Question 27

Bluetooth is typically used to connect workstations.

Question 28

1.
2.
3.
In the figure above, the network marked 3 is configured in a(n) star topology.

Question 29

If you activate WEP, WPA, or WPA2, you must also create a wireless network key.

Question 30

To broadcast at most frequencies, including the frequencies used by cordless phones and baby monitors, requires a license.

Question 31

1.
2.
3.
In the figure above, the network marked 1 is configured in a(n) central topology.

Question 32

The antenna and transceiver for most notebook computers are outside the case.

Question 33

As shown in the figure above, the TCP/IP protocol detects packet collisions, deletes the colliding signals, resets the network, and prepares to retransmit the data.

Question 34

The best-known communications protocol is probably SMTP .

Question 35

A wireless ad hoc network uses a centralized broadcasting device.

Question 36

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

Question 37

A designation number, such as FDDI 802.3, is sometimes used to refer to a network standard in articles and advertisements.

Question 38

Hackers cannot see a network if the SSID is not broadcast.

Question 39

A(n) ring topology uses a common backbone to connect all network devices.

Question 40

The best type of wireless encryption is WPA2 , so use it if all the devices on your network support it.

Question 41

For Internet-based multiplayer games, ____ is usually the limiting factor.

A) the frequency of the wireless signal
B) the brand of network hub
C) the speed of the Internet connection
D) the LAN

Question 42

The figure above depicts a(n) ____ type of network.

A) client/server
B) peer-to-peer
C) ATM
D) MTA

Question 43

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

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

Question 44

The type of network that covers a large geographical area is known as a ____.

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

Question 45

All of the following are LAN standards that were popular in the past but which are rarely used today EXCEPT ____.

A) Token Ring
B) ARCnet
C) Ethernet
D) FDDI

Question 46

In a ____ arrangement, network nodes are connected in a closed circle.

A) circle
B) closed
C) ring
D) star

Question 47

____ tend to be better candidates for wired networks.

A) notebook computers
B) handheld computers
C) PDAs
D) desktop computers

Question 48

A ____ network makes use of a building's existing telephone cables to connect network devices.

A) HomePLC
B) HomePNA
C) HomeRF
D) HomeWi-Fi

Question 49

____ is an abbreviation that refers to the number of times a wave oscillates per second.

A) MBPs
B) Hz
C) MBs
D) DSL

Question 50

____ topology features a central connection point for all workstations and peripherals.

A) centered
B) star
C) bus
D) ring

Question 51

A(n) ____ server stores files and supplies them to workstations on request.

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

Question 52

The telephone network uses a technology called ____ switching.

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

Question 53

The technology in which a message is divided into several parcels that can be routed independently to their destination is called ____.

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

Question 54

Which of the following can connect to a LAN?

A) handheld
B) server
C) mainframe
D) all of the above

Question 55

All of the following are network devices EXCEPT ____.

A) hubs
B) switches
C) workstations
D) routers

Question 56

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

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

Question 57

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 58

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

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

Question 59

To form an HPNA network, workstations are equipped with HPNA ____, which are connected to telephone wall jacks.

A) network switches
B) NICs
C) infrared lights
D) RF signals

Question 60

The arrangement of devices in a network is referred to as its physical ____.

A) topography
B) logography
C) logology
D) topology

Question 61

If Windows displays the ____ icon and indicates the network is connected, it is ready for use.

A) Network Neighborhood
B) My Network Places
C) My LANs
D) Local Area Connection

Question 62

Bluetooth version 2.0 offers a peak transmission rate of ____ over a range of 3-300 feet.

A) .5 Mbps
B) 1 Mbps
C) 2 Mbps
D) 3 Mbps

Question 63

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 64

HomePNA supports up to ____ feet of wiring between devices.

A) 500
B) 1000
C) 2500
D) 10000

Question 65

The most popular wireless LAN technology is ____.

A) Ethernet
B) Wi-Fi
C) FCC
D) WiMAX

Question 66

As shown in the figure above, most wireless routers include ports for ____ Ethernet cables.

A) 2
B) 3
C) 4
D) 6

Question 67

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

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

Question 68

A ____ server is a computer whose primary purpose is to be a repository for files that can be accessed by network workstations.

A) file
B) print
C) document
D) backup

Question 69

Most wireless networks transport data as ____ signals.

A) transponder
B) satellite
C) microwave
D) RF

Question 70

____ technology uses two or more antennae to essentially send multiple sets of signals between network devices.

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

Question 71

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) Wireless LANs are faster for intra-LAN operations, such as exchanging files and sharing printers.
C) Even the slowest wireless LAN technologies are faster than most Internet services.
D) Despite interference, wireless networks are fast enough for most applications.

Question 72

A network ____ sends data only to the devices specified as the destination.

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

Question 73

A ____ network uses a premises' electrical wiring to form the infrastructure for a LAN.

A) HomeRF
B) Powerline
C) HomePNA
D) HomeWi-Fi

Question 74

Signal range can be limited by thick ____.

A) walls
B) floors
C) ceilings
D) all of the above

Question 75

Which of the following is NOT true?

A) Using groupware, several people can work together on a single document.
B) Purchasing a single software copy for an entire LAN is allowed under the terms of a single-user license agreement.
C) To transfer data between standalone computers, a file is usually copied to some type of removable storage media, and then carried or mailed to the other computer, where it is copied onto the hard disk.
D) Sharing networked hardware can reduce costs.

Question 76

In a powerline network, data travels along the electrical wiring from one network device to another at speeds of about ____.

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

Question 77

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 78

Which of the following is a disadvantage when wireless networks are compared to wired networks?

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

Question 79

Which of the following is NOT true?

A) When a network malfunctions, all of the resources you access over the network are unavailable until the network is repaired.
B) LANs are invulnerable to unauthorized access because of the use of firewalls.
C) LANs are more vulnerable than standalone computers to malicious code.
D) Wireless LANs can be tapped from a specially equipped computer in a car that is being driven by a hacker.

Question 80

Wi-Fi encompasses several standards, designated by all of the following letters EXCEPT ____.

A) b
B) a
C) n
D) p