Quiz 7: Wired and Wireless Local Area Networks
Computing
Q 1Q 1
As discussed in this textbook, three layers of a network model are the components required for a typical network, including local area networks.
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True False
False
Q 2Q 2
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.
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True False
False
Q 3Q 3
By offloading printing tasks from the main LAN server, a print server increases network efficiency.
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True False
True
Q 4Q 4
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.
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True False
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True False
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True False
Q 7Q 7
Many network hubs incorporate repeaters or amplifiers to regenerate signals so that attenuation of the signal does not occur.
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True False
Q 8Q 8
The NOS software for the server computer provides the physical, data link, and network layer functions.
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True False
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True False
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True False
Q 11Q 11
A hardware device that is not included in a network profile cannot be accessed by another computer on the network.
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True False
Q 12Q 12
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.
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True False
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True False
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True False
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True False
Q 16Q 16
Topology refers to the geometric layout of the network and describes how the computers are interconnected.
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True False
Q 17Q 17
A collision on a bus circuit means that two computers on that circuit have transmitted at the same time.
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True False
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True False
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True False
Q 20Q 20
A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.
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True False
Q 21Q 21
A forwarding table tells a switch which port it should send out a packet to get to the destination computer.
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True False
Q 22Q 22
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.
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True False
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True False
Q 24Q 24
Store and forward switching cannot be used unless incoming and outgoing data circuit has the same data rate.
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True False
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True False
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True False
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True False
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True False
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True False
Q 30Q 30
An access point ensures that all computers within range of the access point can communicate with each other,
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True False
Q 31Q 31
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.
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True False
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True False
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True False
Q 34Q 34
Wireless LANs use Carrier Sense Multiple Access with Collision Detection CSMA/CD)
for medic access control.
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True False
Q 35Q 35
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.
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True False
Q 36Q 36
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.
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True False
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True False
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True False
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True False
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True False
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True False
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True False
Q 43Q 43
It takes 802.11a more access points to provide the same coverage as one 802.11b access point.
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True False
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True False
Q 45Q 45
Compared to 802.11b, 802.11g provides fewer channels for stations to communicate with the access point.
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True False
Q 46Q 46
The data link layer protocols used by wireless LANs are similar to the ones used on Ethernet LANs
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True False
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True False
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True False
Q 49Q 49
Wired Equivalent Privacy requires that each user have a preconfigured key in order to communicate with an access point.
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True False
Q 50Q 50
Wi-Fi Protected Access WPA) uses the same key for every packet that is transmitted to the client.
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True False
Q 51Q 51
Directional antennas produce a stronger signal over longer distances than omnidirectional antennas.
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True False
Q 52Q 52
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
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Multiple Choice
Q 53Q 53
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
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Multiple Choice
Q 54Q 54
Which of the following is not a basic LAN component?
A)client
B)PAD
C)server
D)network interface card
E)network operating system
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Multiple Choice
Q 55Q 55
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)
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Multiple Choice
Q 56Q 56
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
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Multiple Choice
Q 57Q 57
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
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Multiple Choice
Q 58Q 58
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
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Multiple Choice
Q 59Q 59
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
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Multiple Choice
Q 60Q 60
__________ 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
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Multiple Choice
Q 61Q 61
_____________ 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
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Multiple Choice
Q 62Q 62
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
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Multiple Choice
Q 63Q 63
_____________ 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
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Multiple Choice
Q 64Q 64
A _________ is a group of related resources.
A)workgroup
B)domain
C)server
D)client
E)sharepoint
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Multiple Choice
Q 65Q 65
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
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Multiple Choice
Q 66Q 66
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
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Multiple Choice
Q 67Q 67
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
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Multiple Choice
Q 68Q 68
Ethernet LAN was developed by:
A)IBM
B)ARPANET
C)DEC, Xerox, and Intel
D)University of Minnesota
E)CERN laboratory in Geneva
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Multiple Choice
Q 69Q 69
___________ is how the network works conceptually.
A)Physical topology
B)Logical topology
C)Network topology
D)Ethernet
E)Media access control
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Multiple Choice
Q 70Q 70
The type of logical topology that Ethernet uses is a:
A)ring
B)bus
C)star
D)mesh
E)interconnected
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Multiple Choice
Q 71Q 71
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
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Multiple Choice
Q 72Q 72
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
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Multiple Choice
Q 73Q 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
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Multiple Choice
Q 74Q 74
_________ is not a type of Ethernet specification.
A)100Base-T
B)10GbE
C)1000Base-T 1GbE)
D)10Base-T
E)Securenet
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Multiple Choice
Q 75Q 75
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
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Multiple Choice
Q 76Q 76
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
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Multiple Choice
Q 77Q 77
________ 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
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Multiple Choice
Q 78Q 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
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Multiple Choice
Q 79Q 79
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.
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Multiple Choice
Q 80Q 80
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
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Multiple Choice
Q 81Q 81
A switch uses a _____________ that is very similar to a routing table used in a router.
A)cable plan
B)forwarding table
C)network server
D)reversing table
E)switching mullion
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Multiple Choice
Q 82Q 82
Which of the following is not true about layer-2 switched Ethernet?
A)A switch replaces the hub.
B)The physical topology is the same as the physical topology of shared Ethernet: a ring.
C)The logical topology is a star.
D)The switch uses a forwarding table to route the packet to the correct circuit/computer.
E)The switch chooses which packet to transmit first if it receives more than one packet destined for the same computer at the same time, and stores the other packets) temporarily.
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Multiple Choice
Q 83Q 83
Which of the following is not true about switched Ethernet?
A)The switch has a physical bus topology.
B)It uses a switch instead of a hub.
C)It has faster connections almost immediate) than traditional Ethernet.
D)It essentially provides a point-to-point connection between computers.
E)It has forwarding tables in which entries are learned over time.
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Multiple Choice
Q 84Q 84
Which of the following is a mode in which a switch operates:
A)fast learning switching
B)routing switching
C)fragment-free switching
D)store switching
E)cut switching
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Multiple Choice
Q 85Q 85
Each of the circuits connected to a switch is a separate _______________ circuit connecting the switch to a device on the network.
A)multipoint
B)point-to-point
C)shared
D)ring
E)star
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Multiple Choice
Q 86Q 86
Wired Ethernet is a _______________ technology for small SOHO devices, meaning that manufacturers are no longer creating new products..
A)host
B)legacy
C)caching
D)hub
E)peak
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Multiple Choice
Q 87Q 87
LAN bottlenecks are usually found at the:
A)data entry keyboard and client video monitors
B)LAN server and network circuit
C)hub repeaters and transducer circuit modules
D)client operating system and diskette drive
E)client hard drive and processor
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Multiple Choice
Q 88Q 88
Which of the following can provide fault tolerance for the storage space on a server?
A)RAID
B)SCSI
C)IDE
D)USB
E)EIDE
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Multiple Choice
Q 89Q 89
Which of the following is not a potential bottleneck for LAN performance?
A)number and speed of hard disks in the server
B)amount of memory in the server
C)speed of server's CPU
D)network interface card
E)all of the answers are potential bottlenecks for LAN performance
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Multiple Choice
Q 90Q 90
If your LAN server is overloaded, which of the following should you not consider to solve the server problem)?
A)adding one or more additional servers
B)upgrading the server's CPU with a faster CPU
C)increasing the amount of memory of the server
D)increasing the number and speed of hard disks in the server
E)replacing the cable with fiber optic cable
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Multiple Choice
Q 91Q 91
To increase the volume of simultaneous messages the LAN circuit can transmit from network clients to the servers), you can:
A)increase the CPU of the server
B)upgrade to a bigger circuit
C)increase the number of hard disks on the server
D)increase the amount of disk capacity of the server
E)increase the amount of memory of the server
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Multiple Choice
Q 92Q 92
Breaking a network into smaller parts is called network:
A)fragmentation
B)segmentation
C)localization
D)allocation
E)mitigation
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Multiple Choice
Q 93Q 93
Which of the following is not an effective way to reduce LAN network demand:
A)move files to client computers
B)use disk caching on the client machines
C)find an application that places a large demand on the network and run it a time when the network is lightly loaded
D)add hidden nodes
E)shift the users' routines
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Multiple Choice
Q 94Q 94
Which of the following is not a WLAN standard?
A)802.11ac
B)802.11a
C)802.3
D)802.11b
E)802.11g
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Multiple Choice
Q 95Q 95
The IEEE designation for the type of wireless standard that uses both the 2.4 and 5 GHz range is __________.
A)802.11n
B)802.11a
C)802.3
D)802.11b
E)802.11g
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Multiple Choice
Q 96Q 96
An) _____________ is used in a computer to connect it to a WLAN.
A)Ethernet NIC
B)antennae
C)wireless NIC
D)access point
E)hub
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Multiple Choice
Q 97Q 97
An) ___________ is a radio transceiver that plays the same role as a hub or switch in a wired network and connects the WLAN to the wired network.
A)Ethernet NIC
B)antennae
C)wireless NIC
D)access point
E)hub
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Multiple Choice
Q 98Q 98
How many channels does the 802.11ac standard provide for communication between the access point and clients?
A)4
B)6
C)8
D)11
E)2
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Multiple Choice
Q 99Q 99
How can a set of 802.11b access points be configured to operate without interference?
A)assigning each access point a different channel to communicate with clients
B)separate each access point by more than 10 meters
C)assign the same channel to no more than two access points
D)use omnidirectional antennas on some access points and directional on others.
E)none of the above
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Multiple Choice
Q 100Q 100
__________ antennas transmit the signal in all directions.
A)directional
B)microware
C)omnidirectional
D)radio
E)vertical
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Multiple Choice
Q 101Q 101
__________ antennas project a signal in only one direction and are most often used on the inside of an exterior wall pointing to the inside of the building for security reasons.
A)directional
B)microware
C)omnidirectional
D)radio
E)vertical
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Multiple Choice
Q 102Q 102
CSMA/CA is an acronym for:
A)Carrier Sense Multiple Access with Collision Acknowledgment
B)Carrier Sense Mode Access with Carrier Avoidance
C)Carrier Sense Multiple Access with Collision Avoidance
D)Carrier Sensory Multiple Access without Collision Acknowledgment
E)Carrier Sense Multiple Acknowledgment with Collision Avoidance
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Multiple Choice
Q 103Q 103
Another name for distributed coordination function DCF) is __________.
A)distributed carrier sense method
B)physical carrier sense method
C)physical carrier sense mode
D)distributed carrier sense mode
E)distributed coordination mode
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Multiple Choice
Q 104Q 104
When a computer transmits at the same time because it cannot sense that another computer on the WLAN is currently transmitting is referred to as the:
A)out of range problem
B)collision problem
C)hidden node problem
D)controlled access problem
E)media access problem
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Multiple Choice
Q 105Q 105
The maximum data rate of a an 802.11ad WLAN is
A)24 Mbps
B)36 Mbps
C)11 Mbps
D)54 Mbps
E)9 Mbps
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Multiple Choice
Q 106Q 106
11g is backward compatible with which type of LAN?
A)802.11a
B)802.11b
C)802.15
D)802.3
E)802.5
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Multiple Choice
Q 107Q 107
How many channels does 802.11g provide for communication with clients,
A)20
B)12
C)10
D)3
E)8
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Multiple Choice
Q 108Q 108
The maximum data rate of an 802.11g WLAN is
A)24 Mbps
B)36 Mbps
C)11 Mbps
D)54 Mbps
E)9 Mbps
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Multiple Choice
Q 109Q 109
Which of the following standards is backward compatible with IEEE802.11a, b, and g?
A)802.11a
B)802.11b
C)802.11g
D)802.11n
E)802.15
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Multiple Choice
Q 110Q 110
Many organizations today are installing traditional wired Ethernet for desktop users and install Wi-Fi as ______________.
A)overlay networks
B)Bluetooth
C)cellular networks
D)mobile networks
E)Ethernet networks
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Multiple Choice
Q 111Q 111
Which of the following is not determined by a site survey?
A)feasibility of the desired coverage
B)potential sources of interference
C)the security of the WLAN
D)estimated number of access points needed to provide coverage
E)current locations of the wired network into which the WLAN will connect.
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Multiple Choice
Q 112Q 112
_____________ refers to practice of writing symbols in chalk on sidewalks and walls to indicate the presence of an unsecured WLAN.
A)wardriving
B)chalking
C)warchalking
D)marking
E)identifying
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Multiple Choice
Q 113Q 113
With _____________, the AP permits the owner to provide a list of valid addresses that can connect.
A)EAP.
B)SSID
C)WEP
D)MAC address filtering
E)SWEP
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Multiple Choice
Q 114Q 114
IEEE 802.11ac runs on which of the following two different frequency spectrums simultaneously?
A)2.4GHz and 5GHz
B)24GHz and 5GHz
C)11GHz and 54GHz
D)8GHz and 11GHz
E)2.4GHz and 11GHz
Free
Multiple Choice
Q 115Q 115
WiGig is standardized as
A)IEEE 802.11ad
B)IEEE 802.11ac
C)IEEE 802.11n
D)IEEE 802.11g
E)IEEE 802.11a
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Multiple Choice
Q 116Q 116
A second type of network that a wireless access point provides is a ______ that is secured by a separate password that is entered on a Web page when you first connect to the network.
A)WI-LO network
B)guest network
C)transient network
D)IEEE 802.temp
E)IEEE 802.11guest
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Multiple Choice
Q 117Q 117
The ___________ is where the organization housing its primary servers.
A)MDF
B)guest house
C)SOHO network
D)data center
E)load balancer
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Multiple Choice
Q 118Q 118
The ________ acts as a router at the front of the server farm.
A)load router
B)MDF
C)Layer 2 switch
D)front-end loader
E)load balancer
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Multiple Choice
Q 119Q 119
____ is the process of creating several logically separate servers on the same physical computer.
A)Server virtualization
B)Server optimization
C)Server proliferation
D)Server platforming
E)Server redundancy
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Multiple Choice
Q 120Q 120
A ___ has a set of high-speed storage devices and servers that are networked together using a very high speed network.
A)wide area network
B)local area network
C)storage area network
D)storage server
E)local area storage WAN
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Multiple Choice
Q 121Q 121
The _____ contains the servers that are designed to serve data to customers and suppliers.
A)e-commerce edge
B)SAN
C)LAN
D)domain controller
E)bottleneck
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Multiple Choice
Q 122Q 122
What does a NOS do? What are the major software parts of a NOS? What is the most important characteristic of a NOS? What are two NOS product names?
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Q 123Q 123
Describe CSMA, CD and CA.How does this work, in essence? Compare this to wireless LANS? How are they similar, and how are they different in terms of MAC?
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Q 126Q 126
Describe in detail the difference between a hub and a switch in a LAN.Draw a diagram of each, and then mark it to show some of the points that you have made in your discussion of the differences.Discuss the difference between shared Ethernet and switched Ethernet in light of your answer.
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Q 127Q 127
Given a specific description of an Ethernet type, be prepared to answer questions regarding its speed, type of transmission and physical structure,
e.g., 100BaseT, etc.
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Q 129Q 129
What is the best practice Ethernet at the present time? Describe, and explain why this is best practice.What is the best practice wireless at the present time? Describe and explain why this is best practice.Would you install a wired or wireless Ethernet right now? Describe, if you were a manager, what your network of choice would be and why.
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Q 130Q 130
Discuss in detail how you would improve a LAN network's performance, and what you would look for.
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Q 133Q 133
What is the "hidden node" problem, and what do you need to do about it in the best LAN design for wireless?
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Q 137Q 137
Compare a switched Ethernet to a wireless Ethernet.What are four essential differences between these two approaches to building a LAN? Give three reasons why a switched Ethernet is preferable to wireless.Three reasons why wireless might be preferred to switched?
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Q 138Q 138
Select three different types of IEEE 802.11 and describe when it might be best to use each one.
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Q 139Q 139
Discuss wireless network security.What are some of the critical problems, what are some of the defenses against these problems? List five potential weaknesses in security and five potential solutions to these perceived weaknesses.
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