True/False
Indicate whether the
statement is true or false.
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1.
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Most bus networks use coaxial cable as their physical medium.
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2.
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Bus networks are difficult to troubleshoot because it is a challenge to identify
fault locations.
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3.
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The ring topology forms the basis for modern Ethernet and Fast Ethernet
networks.
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4.
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A collapsed backbone provides network administrators with the ability to
segregate workgroups and, therefore, manage them more easily.
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5.
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FDDI can connect LANs located in multiple buildings, such as those on college
campuses.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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6.
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A(n) ____ is the layout, or pattern, of the nodes on a network.
a. | serial backbone | c. | enterprise | b. | physical topology | d. | distributed
backbone |
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7.
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A(n) ____ topology consists of a single cable connecting all nodes on a network
without intervening connectivity devices.
a. | star | c. | bus | b. | physical | d. | ring |
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8.
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In a(n) ____ topology, each node is connected to the two nearest nodes so that
the entire network forms a circle.
a. | ring | c. | star | b. | bus | d. | star-wired |
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9.
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In a(n) ____ topology, every node on the network is connected through a central
device, such as a hub or switch.
a. | ring | c. | star | b. | bus | d. | network |
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10.
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A(n) ____ consists of a number of connectivity devices connected to a series of
central connectivity devices, such as hubs, switches, or routers, in a hierarchy.
a. | collapsed backbone | c. | distributed backbone | b. | serial backbone | d. | parallel
backbone |
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11.
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In ____, a connection is established between two network nodes before they begin
transmitting data.
a. | circuit switching | c. | message switching | b. | packet switching | d. | passive
scanning |
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12.
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A(n) ____ is the length of time data takes to travel from one point on the segment to another point.
a. | access method | c. | probe | b. | data propagation delay | d. | beacon frame |
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13.
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____ enables multiple nodes to simultaneously transmit and receive data over
different logical network segments.
a. | ATM | c. | QoS | b. | LAN Emulation | d. | Switched
Ethernet |
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14.
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In ____, a 3-byte packet is transmitted from one node to another in a circular
fashion around the ring.
a. | packet switching | c. | reassociation | b. | token passing | d. | circuit
switching |
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15.
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Which of the following encapsulates incoming Ethernet or Token Ring frames, then
converts them into ATM cells for transmission over an ATM network?
a. | LAN Emulation | c. | Power over Ethernet | b. | CSMA/CA | d. | Ethernet_II |
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16.
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As long as a station is on and has its wireless protocols running, it
periodically surveys its surroundings for evidence of an access point, a task known as ____.
a. | switching | c. | scanning | b. | probing | d. | reassociation |
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17.
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In ____, a wireless station listens on all channels within its frequency range
for a special signal, known as a beacon frame, issued from an access point.
a. | probing | c. | circuit switching | b. | reassociation | d. | passive
scanning |
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18.
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Multiple Bluetooth piconets can be combined to form a(n) ____.
a. | packet | c. | serial backbone | b. | scatternet | d. | Ethernet |
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19.
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The router or switch that makes up the collapsed backbone must contain ____ to
handle the heavy traffic going through it.
a. | frames | c. | terminators | b. | piconets | d. |
multiprocessors |
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20.
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____ occurs when two nodes simultaneously check a channel, determine that it is
free, and begin to transmit.
a. | Jamming | c. | Circuit switching | b. | Collision | d. | Association |
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21.
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____ is an Ethernet frame type developed by DEC, Intel, and Xerox before the
IEEE began to standardize Ethernet.
a. | Ethernet_II | c. | IPX | b. | Ethernet_III | d. | SPX |
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22.
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Which of the following standards specifies a method for supplying electrical
power over Ethernet connections?
a. | Ethernet_SNAP | c. | PoE | b. | Ethernet_II | d. | 802.3af |
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23.
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Which of the following maintains the timing for ring passing, monitors token and
frame transmission, detects lost tokens, and corrects errors when a timing error or other disruption
occurs on a Token Ring network?
a. | Terminator | c. | Bluetooth | b. | Active monitor | d. | Connector |
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24.
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____ uses a double ring of multimode or single-mode fiber to transmit data at
speeds of 100 Mbps.
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25.
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Which of the following is considered a hybrid topology?
a. | Star | c. | Star-wired ring | b. | Bus | d. | Ring |
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26.
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In networking, the term ____ refers to an entire organization, including its
local and remote offices, a mixture of computer systems, and a number of departments.
a. | enterprise | c. | industry | b. | company | d. | business |
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Completion
Complete each
statement.
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27.
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At the ends of each bus network are 50-ohm resistors known as ____________________.
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28.
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____________________ switching establishes a connection between two devices,
transfers the information to the second device, and then breaks the connection.
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29.
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____________________ switching breaks data into packets before they are
transported.
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30.
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A network’s ____________________ is its method of controlling how
network nodes access the communications channel.
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31.
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On an Ethernet network, a(n) ____________________ is the portion of a
network in which collisions occur if two nodes transmit data at the same time.
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Matching
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Match each term with the correct statement below. a. | Network backbone | f. | CSMA/CD | b. | Daisy chain | g. | ATM | c. | Collapsed
backbone | h. | Virtual
circuits | d. | Logical topology | i. | Piconet | e. | Switching |
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32.
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Topology that uses a router or switch as the single central connection point
for multiple subnetworks.
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33.
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Refers to the way in which data is transmitted between nodes.
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34.
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The cabling that connects the hubs, switches, and routers on a network.
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35.
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An ITU networking standard describing Data Link layer protocols for both
network access and signal multiplexing.
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36.
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Linked series of devices.
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37.
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Connections between network nodes that, although based on potentially disparate
physical links, logically appear to be direct, dedicated links between those nodes.
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38.
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The access method used in Ethernet.
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39.
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A component of a network’s logical topology that determines how
connections are created between nodes.
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40.
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A Bluetooth PAN.
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Short Answer
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41.
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What are some of the disadvantages of networks based on the bus topology?
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42.
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Why do you think the star topology has become the most popular fundamental
layout used in contemporary LANs?
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43.
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What are some of the advantages of using packet switching to connect nodes on a
network?
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44.
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Explain the meaning of the terms Carrier Sense and Multiple
Access.
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45.
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What is the purpose of the 7-byte preamble and 1-byte start-of-frame delimiter
on an Ethernet frame?
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46.
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What are the advantages and disadvantages of the Fiber Distributed Data
Interface (FDDI)?
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47.
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Discuss the advantages of using virtual circuits.
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48.
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What is the difference between active and passive scanning?
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49.
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Discuss the meaning of the following terms: control frame, management frame, and
data frame.
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50.
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What is the difference between circuit switching and packet switching?
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