Deck 7: Wired and Wireless Local Area Networks

Question 1

By offloading printing tasks from the main LAN server, a print server increases network efficiency.

Answer 1

True

Question 2

The Ethernet standard was developed first by the IEEE.

Answer 2

False

Question 3

Network profile refers to what resources on each server are available on the network for use by other computers and which devices or people are allowed access on the network.

Answer 3

True

Question 4

Many network hubs incorporate repeaters or amplifiers to regenerate signals so that attenuation of the signal does not occur.

Question 5

Fiber optic cable is thicker and heavier than unshielded twisted pair.

Question 6

Ethernet is a layer 3 protocol, which operates at the network layer.

Question 7

One of the most important functions of Network Operating System NOS) is a directory service.

Question 8

The NOS software for the server computer provides the physical, data link, and network layer functions.

Question 9

The three latest versions of Ethernet run at speeds of 1Gbps, 10Gbps, and 50 Gbps.

Question 10

1000Base-LX is a version of 1000Base-T than runs on four pairs of CAT 5 cable.

Question 11

A hardware device that is not included in a network profile cannot be accessed by another computer on the network.

Question 12

Traditional Ethernet is also known as shared Ethernet.

Question 13

LDAP is an industry standard directory protocol.

Question 14

A Network Operating System NOS), such as Linux or Windows Server 2008, must be used in addition to the 'normal' operating system, such as Windows, on a server in a dedicated server LAN.

Question 15

A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.

Question 16

The Network Interface Card NIC) permits a computer to be physically connected to a network's cable, which provides the network layer connection among the computers in the network.

Question 17

Topology refers to the geometric layout of the network and describes how the computers are interconnected.

Question 18

A collision on a bus circuit means that two computers on that circuit have transmitted at the same time.

Question 19

As discussed in this textbook, three layers of a network model are the components required for a typical network, including local area networks.

Question 20

LANs that run on radio frequencies use a type of wired media.

Question 21

The DCF function of Wi-Fi resolves the hidden node problem.

Question 22

Point Coordination Function requires that each station that wishes to transmit on the wireless network sends a request-to-transmit RTS) packet to the access point and waits for a clear-to-send CTS) packet from the AP before it can communicate with other nodes on the network.

Question 23

Directional antennas signals are much stronger than omnidirectional antennas.

Question 24

Most access points AP) deployed in wireless LANs use directional antennas.

Question 25

11b is a faster wireless standard than 802.11a.

Question 26

A switch can send and receive on all circuits simultaneously.

Question 27

A forwarding table tells a switch which port it should send out a packet to get to the destination computer.

Question 28

The frequency ranges of some access points are the same as some cordless telephones.

Question 29

An access point AP) is required to connect a WLAN to a wired network.

Question 30

Wireless LANs are never connected to a wire network.

Question 31

The maximum data rate of 802.11b LANs is 12 Mbps.

Question 32

Store and forward switching cannot be used unless incoming and outgoing data circuit has the same data rate.

Question 33

Distributed Coordination Function is a media access control method used in wireless LANs where the sender waits for an ACK acknowledgement) from the receiver before transmitting any more packets.

Question 34

11a provides for speeds of up to 54 Mbps under perfect conditions.

Question 35

11b LANs operate at speeds up to 11 Mbps.

Question 36

When a switch receives a packet with a destination address that is not in its forwarding table, the switch will broadcast the packet to all of its ports.

Question 37

11b provides three separate channels for indoor use in the U.S.that can be used for communication between the access point and other wireless devices on the network.

Question 38

Wireless LANs use Carrier Sense Multiple Access with Collision Detection CSMA/CD)
for medic access control.

Question 39

Cut through switching has fewer errors than store and forward switching.

Question 40

An access point ensures that all computers within range of the access point can communicate with each other,

Question 41

Directional antennas produce a stronger signal over longer distances than omnidirectional antennas.

Question 42

11a LANs provide more channels than 802.11b LANs

Question 43

Hubs:

A)usually incorporate repeaters or amplifiers
B)have connection points called handles
C)limit the distance of a network to a few meters in length
D)are a difficult method to connect network cables
E)operate at the application layer

Question 44

Wired Equivalent Privacy requires that each user have a preconfigured key in order to communicate with an access point.

Question 45

Which of the following is not a purpose for using hubs in a network?

A)to act as a communications server
B)to connect network cables
C)to prevent attenuation
D)to act as a junction box
E)none of the above

Question 46

Of the following, which is not true about fiber optic cable?

A)it is thinner than unshielded twisted pair cable
B)it is lighter than unshielded twisted pair cable
C)it has a very low capacity
D)it is more expensive than CAT5 unshielded twisted pair cable
E)it is a type of guided media

Question 47

An 802.11g NIC can communicate with an 802.11n access point.

Question 48

Which of the following is not an advantage of using Cat5 unshielded twisted pair for cabling LANs?

A)cost relative to fiber)
B)thickness relative to coax)
C)weight relative to coax)
D)flexibility relative to coax)
E)security relative to fiber)

Question 49

An) ____________ allows many users to share the same set of files on a common, shared disk drive.

A)print server
B)database server
C)file server
D)piconet server
E)remote access server

Question 50

The data link layer protocols used by wireless LANs are similar to the ones used on Ethernet LANs

Question 51

Which of the following is not a basic LAN component?

A)client
B)PAD
C)server
D)network interface card
E)network operating system

Question 52

Wireless LANs do not share the bandwidth capacity of the wireless network.

Question 53

Wi-Fi Protected Access WPA) uses the same key for every packet that is transmitted to the client.

Question 54

Which of the following type of media is most commonly used in backbone networks because of its high capacity?

A)fiber
B)infrared frequencies
C)coax cable
D)unshielded twisted pair
E)shielded twisted pair

Question 55

__________ is not true with respect to network hubs.

A)Each port in a hub has a unique number.
B)A good network plan includes hubs in areas, such as a telecommunications wiring closet, in which a network may expand
C)Simple hubs are commonly available in 4-, 8-, 16-, and 24-port sizes
D)Many hubs act as repeaters or amplifiers
E)Hubs provide a complicated way to connect network cables

Question 56

An) _____________ is not a common type of dedicated server.

A)file server
B)print server
C)database server
D)collision server
E)remote access server

Question 57

A site survey is not an important component of a WLAN design.

Question 58

The maximum transmission speed of 802.11a LANs is 11 Mbps.

Question 59

It takes 802.11a more access points to provide the same coverage as one 802.11b access point.

Question 60

Compared to 802.11b, 802.11g provides fewer channels for stations to communicate with the access point.

Question 61

A _________ is a group of related resources.

A)workgroup
B)domain
C)server
D)client
E)sharepoint

Question 62

The cheapest time to install network cabling is:

A)during the construction of the building
B)as soon as the building is completed
C)as soon as the building is occupied
D)about five years after the building is occupied so that the exact office locations for each network computer is known
E)any time that a network needs to be installed

Question 63

A __________ indicates what resources on each server are available on the network for use by other computers and what people are allowed what access to the network.

A)user profile
B)user access log
C)network profile
D)network operating system
E)server allocation list

Question 64

The server version of the Network Operating System does not:

A)provide the software that performs the functions associated with the physical layer
B)provide the software that performs the functions associated with the data link layer
C)provide the software that performs the functions associated with the application layer
D)provide the software that performs the functions associated with the network layer
E)usually provide the software that performs the functions associated with the computer's own operating system

Question 65

_________ is not a type of Ethernet specification.

A)100Base-T
B)10GbE
C)1000Base-T 1GbE)
D)10Base-T
E)Securenet

Question 66

1000 Base-T:

A)can run at either full- or half-duplex
B)is one of the oldest forms of Ethernet
C)is one of the slowest forms of Ethernet
D)can only be used over coaxial cables
E)has only one version, 1000Base-SLCX

Question 67

A logical bus topology:

A)is always used by token ring protocol LANs
B)has all computers connected to each other in point-to-point connections
C)is limited to short distances since devices like a hub or repeater cannot be used with this type of topology
D)permits every message to be received by every computer on the bus, even when those messages are intended for other computers
E)has a central control device, such as a mainframe

Question 68

10Base-T:

A)supports 10 Mbps data rate
B)is inexpensive
C)runs on twisted pair
D)is more dominant than token ring
E)all of the answers are correct

Question 69

A hierarchical tree of domains within one organization that is linked to other trees in the organization is called a ___________.

A)ADS
B)domain
C)forest
D)tree
E)NDS

Question 70

Ethernet LAN was developed by:

A)IBM
B)ARPANET
C)DEC, Xerox, and Intel
D)University of Minnesota
E)CERN laboratory in Geneva

Question 71

___________ is how the network works conceptually.

A)Physical topology
B)Logical topology
C)Network topology
D)Ethernet
E)Media access control

Question 72

________ is a hybrid version of Ethernet that uses either 10Base-T or 100Base-T.

A)Mullion Ethernet
B)Base-T Ethernet
C)10/100 Ethernet
D)Token ring Ethernet
E)FDDI Ethernet

Question 73

Which of the following is not true about CSMA/CD?

A)The acronym refers to Carrier Sense Multiple Access with Collision Detection
B)It is used in token ring protocol LANs
C)It is a contention-based media access control technique
D)When a collision has occurred, the computers that wish to transmit wait a random amount of time after a colliding message before attempting to retransmit
E)Computers on the circuit 'listen' before transmitting

Question 74

Which of the following is not true about 10/100 Ethernet?

A)It is not a hybrid type of Ethernet.
B)It provides flexibility for organizations that want to use both the 10Base-T and 100Base-T standards at the same time.
C)10/100 autosense hubs and/or switches) are able to detect the signal transmitted by the client's NIC and use 10 Mbps or 100 Mbps, depending on what the client uses.
D)Depending upon how it is configured, a 10/100 Ethernet NIC can run at either 10 Mbps or at 100 Mbps.
E)It provides flexibility for organizations that are uncertain about which Ethernet standard to use in the short term.

Question 75

Switch-based Ethernet:

A)uses a hub to connect computers
B)has a physical topology of a ring
C)has a logical topology of a ring
D)has a logical topology of a bus
E)usually enables all attached circuits to send or receive packets simultaneously

Question 76

The type of logical topology that Ethernet uses is a:

A)ring
B)bus
C)star
D)mesh
E)interconnected

Question 77

Media access control refers to:

A)the price of fiber optic cable
B)security over floppy disks in a user environment
C)the ability for a user to use multimedia equipment in a LAN
D)controlling access to a media by more than one computer in a LAN
E)the control over coax cable installed by a cable service provider

Question 78

10/100 Ethernet:

A)uses 100 Mbps throughout the entire network
B)is not useful in the short run for organizations that are uncertain about which Ethernet standard to use
C)uses 10 Mbps throughout 100% of the entire network
D)provides traditional 10 Mbps Ethernet connections to client computers utilizing traditional 10Base-T, with 100 Mbps generally used to the server
E)uses 10 Gbps throughout 100% of the entire network

Question 79

_____________ provide information about resources on the network that are available to the users, such as shared printers, file servers and application software.

A)Network Services
B)Directory Services
C)Client Services
D)Computing Services
E)Remote Access Services

Question 80

_____________ is the software that controls the network.

A)Network Operating System
B)Client Operating System
C)Embedded Operating System
D)Network Control System
E)Network Software System