Deck 6: Wired and Wireless LANs

Question 1

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

Answer 1

True

Question 2

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

Answer 2

False

Question 3

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.

Answer 3

False

Question 4

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

Question 5

LDAP is an industry standard directory protocol.

Question 6

Software Publishers Association has embarked upon an aggressive software audit program to check the number of illegal software copies on LANs.

Question 7

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

Question 8

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.

Question 9

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

Question 10

Resource sharing refers to having users access the same data files,exchange information via e-mail,or use the Internet.

Question 11

Traditional Ethernet is also known as shared Ethernet.

Question 12

LAN metering software can be used to prohibit using more copies of a package than there are installed licenses.

Question 13

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

Question 14

Peer-to-peer networks have computers that are permanently assigned as network servers

Question 15

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

Question 16

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 17

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

Question 18

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

Question 19

LANs can be categorized as either dedicated (with a dedicated server)or peer-to-peer (without a dedicated server).

Question 20

On a network,it is always legal to purchase one copy of software,such as a word processing package,that multiple users use simultaneously.

Question 21

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

Question 22

A switch can send and receive on all circuits simultaneously.

Question 23

Directional antennas signals are much stronger than omnidirectional antennas.

Question 24

Wireless LANs are never connected to a wire network.

Question 25

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

Question 26

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 27

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

Question 28

A workgroup switch is designed to work on the Backbone Network (BN).

Question 29

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

Question 30

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

Question 31

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

Question 32

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

Question 33

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 34

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

Question 35

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 36

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

Question 37

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

Question 38

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

Question 39

The Ethernet standard was developed first by the IEEE.

Question 40

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

Question 41

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

Question 42

A(n)_____________ 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 43

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

Question 44

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

Question 45

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

Question 46

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

Question 47

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

Question 48

_____________ refers to having users access the same data files,exchange information via electronic mail,or search the Internet for information.

A) Resource sharing
B) User grouping
C) User profiling
D) Information sharing
E) Data pirating

Question 49

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

Question 50

Which of the following is not a critical software component in a dedicated server LAN?

A) application software on server computers
B) network operating system in the dedicated server
C) network communication software on the client
D) LAN metering software
E) application software on client computers

Question 51

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

Question 52

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

Question 53

A dedicated server LAN:

A) can only use simple LAN software
B) is limited to handling small databases
C) has one or more permanently assigned servers that can enable users to share files, for example
D) can not connect with other networks
E) is limited to handling small files

Question 54

Extensible Authentication Protocol can dynamically produce WEP keys.

Question 55

____________ refers to one computer legally sharing a software package,such as Microsoft Word,with other computers on the network to save costs.

A) Software metering
B) Information sharing
C) Resource sharing
D) Software pirating
E) Network routing

Question 56

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

Question 57

A(n)____________ 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 58

A peer-to-peer LAN:

A) has more capability than a dedicated server
B) supports a higher number of computers than a dedicated server
C) is generally cheaper in hardware and software than a dedicated server
D) is not appropriate for sharing resources in a small LAN
E) is often much faster than dedicated server networks

Question 59

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

Question 60

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

Question 61

__________ 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 62

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 63

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 64

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 65

The type of logical topology that Ethernet uses is a:

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

Question 66

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 67

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 68

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

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

Question 69

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 70

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 71

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 72

_____________ 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

Question 73

___________ is how the network works conceptually.

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

Question 74

Ethernet LAN was developed by:

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

Question 75

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 76

A _________ is a group of related resources.

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

Question 77

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 78

_____________ 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 79

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 80

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