Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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The degredation of signal clarity is called ______________. a. | attenuation | c. | signal
loss | b. | interference | d. | weakening | | | | |
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2.
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__________ hubs usually amplify or repeat signals that pass through
them. a. | Passive | c. | Powered | b. | Active | d. | Dynamic | | | | |
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3.
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Hubs that are plugged into electric power are called ___________
hubs. a. | passive | c. | powered | b. | active | d. | dynamic | | | | |
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4.
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A(n) ___________ topology often has a hub at its center. a. | matrix | c. | hybrid | b. | linear bus | d. | star | | | | |
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5.
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A
hub that merely connects different cables on the network and provides no signal regeneration is
called a(n) ___________ hub and is not a repeater. a. | passive | c. | powered | b. | active | d. | static | | | | |
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6.
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___________ operate at the Data Link layer of the OSI model. a. | Repeaters | c. | Bridges | b. | Hubs | d. | Brouters | | | | |
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7.
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When machines must share the wire and compete for available bandwidth with other
machines, they experience
________________. a. | convection | c. | contention | b. | collisions | d. | contraction | | | | |
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8.
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TCP/IP and IPX/SPX protocols span the Network layer and the ____________ layer of
the OSI reference model. a. | Physical | c. | Network | b. | Data
Link | d. | Transport | | | | |
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9.
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Routers operate at the ______________ layer of the OSI model. a. | Physical | c. | Network | b. | Data Link | d. | Transport | | | | |
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10.
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_____________ utilize the IP address to route packets to the correct network
segment. a. | Routers | c. | Bridges | b. | Switches | d. | Repeaters | | | | |
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11.
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An
IP address has _______ bits divided into four octets.
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12.
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The binary equivalent of 168 is: a. | 11000000 | c. | 10100000 | b. | 10101000 | d. | 10110000 | | | | |
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13.
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The binary equivalent of 192 is: a. | 11000000 | c. | 10100000 | b. | 11100000 | d. | 10110000 | | | | |
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True/False
Indicate whether the sentence or statement is true
or false.
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14.
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Repeaters repeat the signal, as well as clean and boost the digital
transmission.
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15.
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Repeaters can reformat, resize, or otherwise manipulate the data
packet.
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16.
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Repeaters can tell the difference between a good signal and a corrupt
signal.
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17.
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Because repeaters work with the actual physical signal, and do not attempt to
interpret the data being transmitted, they are Physical layer devices on the OSI
model.
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18.
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Repeaters work against attenuation by repeating signals that they receive on the
network.
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19.
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Because active hubs have multiple inbound and outbound connections, these hubs are
known as multiport repeaters.
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20.
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Repeaters create logical and/or physical divisions of the
network.
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21.
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Repeaters do not reduce network traffic because they repeat everything they
receive.
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22.
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Because repeaters simply repeat, amplify, and clean up a signal, network
administrators mainly use them to increase the usable distance of the network.
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23.
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Repeaters have little impact on network speed because they do not do any packet
processing.
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24.
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When a client sends a broadcast packet to the entire network, the bridge forwards
the packet.
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25.
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If
the MAC address is located on a segment other than the originating segment, the bridge forwards
it.
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26.
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The bridge functions like a repeater in that it listens to incoming packets and
repeats them on other segments.
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27.
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Because bridges regenerate the network signal when they pass it from segment to
segment, they can extend the cable's usable distance.
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28.
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The fact that bridges forward broadcast traffic can be a major disadvantage on the
network during a broadcast storm.
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29.
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Broadcast traffic is a problem for switches because the hardware address indicates
that all computers should receive the packet.
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30.
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A
switch reduces problems associated with multiple computers transmitting at the same time by
subdividing the network into virtual circuits.
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31.
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On
Ethernet networks, only one computer can communicate on the LAN at a given time.
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32.
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When two machines have a virtual circuit, they do not have to share the wire with
any other computers.
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33.
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Hardware, not software, implements IP addresses.
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34.
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Each port on a router has its own unique IP address.
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35.
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When TCP/IP is used on an internetwork, the logical address is known as an IP
address.
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36.
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Transport protocols used by the devices on a network dictate the format of the
logical address.
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37.
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The structure of an IP address makes it possible for devices to be uniquely
identified on the network.
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38.
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On
an IP network, the logical addresses on a certain segment must be matched.
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39.
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Routers maintain routing tables, which they use to route packets from one network
to another.
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40.
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Routing tables match network addresses with the address of the routers that handle
those networks.
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Completion
Complete each sentence or
statement.
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41.
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The number of ___________ on a network and the length of cable used influence the
quality of communication on the network.
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42.
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As
data leaves the source or transmitting station, the ___________ converts the data to electrical
impulses, if copper wire is used, or to light signals, if a fiber optic cable is
used.
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43.
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_____________ usually refers to the physical layout of network cable and
devices.
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44.
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A(n) __________ is a generic connection device used to tie several networking
cables together to create a link between different stations on a network.
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45.
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When the two simultaneous transmissions collide, the transmitting stations enter
a(n) ______________ period.
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46.
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A(n) _______________ filters traffic between network segments by examining the
destination MAC address that is sent in the data packet.
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47.
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Unlike bridges, the switching hub, opens a(n) _________ circuit between the source
and the destination.
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48.
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____________ provide filtering and network traffic control on LANs and
WANs.
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49.
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Instead of evaluating the physical address of a packet as do switches and bridges,
routers use the ____________ address.
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50.
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When binary IP addresses are written in decimal format, it is often called
_________________.
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