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Chapter 7
Wired and Wireless LANs
True-False Questions
The following are possible True/False questions for tests. The statement is given and the answer
is provided. The level of difficulty (easy, medium, hard) and the section relevant to the topic are
also furnished.
1.
As discussed in this textbook, three layers of a network model are the components required
for a typical network, including local area networks.
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.
3.
By offloading printing tasks from the main LAN server, a print server increases network
efficiency.
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.
5.
LANs that run on radio frequencies use a type of wired media.
6.
Fiber optic cable is thicker and heavier than unshielded twisted pair.
7.
Many network hubs incorporate repeaters or amplifiers to regenerate signals so that
attenuation of the signal does not occur.
8.
The NOS software for the server computer provides the physical, data link, and network
layer functions.
9.
One of the most important functions of Network Operating System (NOS) is a directory
service.
10.
LDAP is an industry standard directory protocol.
11.
A hardware device that is not included in a network profile cannot be accessed by another
computer on the network.
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.
13.
Traditional Ethernet is also known as shared Ethernet.
14.
Ethernet is a layer 3 protocol, which operates at the network layer.
15.
The Ethernet standard was developed first by the IEEE.
16.
Topology refers to the geometric layout of the network and describes how the computers are
interconnected.
17.
A collision on a bus circuit means that two computers on that circuit have transmitted at the
same time.
18.
The three latest versions of Ethernet run at speeds of 1Gbps, 10Gbps, and 50 Gbps.
19.
1000Base-LX is a version of 1000Base-T than runs on four pairs of CAT 5 cable.
20.
A switch always broadcasts all the packets it receives to all the computers that are connected
to the switch.
21.
A forwarding table tells a switch which port it should send out a packet to get to the
destination computer.
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.
23.
Cut through switching has fewer errors than store and forward switching.
24.
Store and forward switching cannot be used unless incoming and outgoing data circuit has
the same data rate.
25.
A switch can send and receive on all circuits simultaneously.
26.
Wireless LANs are never connected to a wire network.
27.
802.11b is a faster wireless standard than 802.11a.
28.
The maximum data rate of 802.11b LANs is 12 Mbps.
29.
An access point (AP) is required to connect a WLAN to a wired network.
30.
An access point ensures that all computers within range of the access point can communicate
with each other,
31.
802.11b 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.
32.
Most access points (AP) deployed in wireless LANs use directional antennas.
33.
Directional antennas signals are much stronger than omnidirectional antennas.
34.
Wireless LANs use Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
for medic access control.
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.
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.
37.
The DCF function of Wi-Fi resolves the hidden node problem.
38.
802.11b LANs operate at speeds up to 11 Mbps.
39.
The frequency ranges of some access points are the same as some cordless telephones.
40.
802.11a provides for speeds of up to 54 Mbps under perfect conditions.
41.
The maximum transmission speed of 802.11a LANs is 11 Mbps.
42.
802.11a LANs provide more channels than 802.11b LANs
43.
It takes 802.11a more access points to provide the same coverage as one 802.11b access
point.
44.
An 802.11g NIC can communicate with an 802.11n access point.
45.
Compared to 802.11b, 802.11g provides fewer channels for stations to communicate with the
access point.
46.
The data link layer protocols used by wireless LANs are similar to the ones used on Ethernet
LANs
47.
Wireless LANs do not share the bandwidth capacity of the wireless network.
48.
A site survey is not an important component of a WLAN design.
49.
Wired Equivalent Privacy requires that each user have a preconfigured key in order to
communicate with an access point.
50.
Wi-Fi Protected Access (WPA) uses the same key for every packet that is transmitted to the
client.
51.
Directional antennas produce a stronger signal over longer distances than omnidirectional
antennas.
MULTIPLE CHOICE
The following are possible multiple-choice questions for tests. The question is posed and the
answer is provided under the choices. The level of difficulty (easy, medium, hard) and the page
number(s) relevant to the topic is also furnished.
1.
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
2.
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
3.
Which of the following is not a basic LAN component?
a. client
b. PAD
c. server
d. network interface card
e. network operating system
4.
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)
5.
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
6.
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
7.
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
8.
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
9.
__________ 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
10.
_____________ 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
11.
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
12.
_____________ 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
13.
A _________ is a group of related resources.
a. workgroup
b. domain
c. server
d. client
e. sharepoint
14.
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
15.
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
16.
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
17.
Ethernet LAN was developed by:
a. IBM
b. ARPANET
c. DEC, Xerox, and Intel
d. University of Minnesota
e. CERN laboratory in Geneva
18.
___________ is how the network works conceptually.
a. Physical topology
b. Logical topology
c. Network topology
d. Ethernet
e. Media access control
19.
The type of logical topology that Ethernet uses is a:
a. ring
b. bus
c. star
d. mesh
e. interconnected
20.
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
21.
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
22.
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
23.
_________ is not a type of Ethernet specification.
a. 100Base-T
b. 10GbE
c. 1000Base-T (1GbE)
d. 10Base-T
e. Securenet
24.
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
25.
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
