True/False Indicate whether the
statement is true or false.
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1.
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Modern Ethernet networks are based on the star topology.
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2.
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The smallest LANs do not have a backbone.
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3.
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A serial backbone is the simplest kind of backbone.
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4.
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The most popular method for connecting nodes on a network is circuit
switching.
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5.
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A network’s access method is its method of controlling how network nodes
access the communications channel.
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Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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A physical topology ____.
a. | specifies device types | c. | specifies connectivity methods | b. | depicts a network in
broad scope | d. | specifies
addressing schemes |
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2.
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Without ____, a bus network would suffer from signal bounce.
a. | hubs | c. | terminators | b. | repeaters | d. | jamming |
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3.
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In a ring network, each workstation acts as a(n) ____ for the
transmission.
a. | repeater | c. | terminator | b. | amplifier | d. | manager |
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4.
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A complex combination of topologies is known as a ____ topology.
a. | mixed | c. | compound | b. | hybrid | d. | mulitpart |
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5.
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The most common logical topologies are ____ and ring.
a. | bus | c. | wired | b. | star | d. | hybrid |
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6.
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A ____ is simply a linked series of devices.
a. | star | c. | ring | b. | star-wired ring | d. | daisy-chain |
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7.
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In packet switching, when packets reach their destination node, the node ____
them based on their control information.
a. | disassembles | c. | reassembles | b. | deletes | d. | separates |
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8.
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Collectively, MPLS labels are sometimes called a ____.
a. | header | c. | frame | b. | shim | d. | title |
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9.
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All Ethernet networks, independent of their speed or frame type, use an access
method called ____.
a. | CSMA | c. | CSAM/CD | b. | CSMA/DC | d. | CSMA/CD |
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10.
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A ____ occurs when two transmissions interfere with each other.
a. | jam | c. | carrier sense | b. | collision | d. | multiple access
event |
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11.
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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.
a. | collision domain | c. | interference domain | b. | crash domain | d. | duplicate
domain |
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12.
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1000Base-T is a standard for achieving throughputs ____ times faster than Fast
Ethernet over copper cable.
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13.
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The 10GBase-T standard is considered a breakthrough for transmitting 10 Gbps
over ____ medium.
a. | coaxial | c. | fiber | b. | twisted pair | d. | atmosphere |
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14.
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The most common 1-Gigabit Ethernet standard in use today is ____.
a. | 1000Base-T | c. | 10GBase-SR | b. | 1000Base-SX | d. | 1000Base-LX |
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15.
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1000Base-SX has a maximum throughput of ____.
a. | 1 Gbps | c. | 100 Gbps | b. | 10 Gbps | d. | 1000 Gbps |
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16.
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The 10-gigabit fiber optic standard with the shortest segment length is
____.
a. | 10GBase-T | c. | 10GBase-LR | b. | 10GBase-SR | d. | 10GBase-ER |
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17.
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In the 10GBase-LR standard, the L stands for ____.
a. | long reach | c. | long ring | b. | LAN | d. | little ring |
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18.
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Given their long-distance capabilities, 10GBase-ER and 10GBase-EW are best
suited for use on ____.
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19.
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Within Ethernet frame types, the ____ signals to the receiving node that data is
incoming and indicates when the data flow is about to begin.
a. | FCS | c. | preamble | b. | header | d. | frame |
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20.
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Together, the FCS and the header make up the ____-byte “frame” for
the data.
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21.
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The Ethernet II frame type contains a 2-byte ____ field that differentiates it
from other Ethernet frame types.
a. | data | c. | source | b. | length | d. | type |
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Completion Complete each
statement.
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1.
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In a(n) ____________________ topology, every node on the network is connected
through a central device, such as a hub, router, or switch.
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2.
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A network ____________________ is the part of a network to which segments and
significant shared devices connect.
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3.
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____________________ is a component of a network’s logical topology that
determines how connections are created between nodes.
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4.
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As part of CSMA/CD, a process known as ____________________ allows the NIC issue
a special 32-bit sequence that indicates to the rest of the network nodes that its previous
transmission was faulty and that those data frames are invalid.
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5.
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Because of its support for multiple Network layer protocols and because it uses
fewer bytes as overhead, ____________________ is the frame type most commonly used on contemporary
Ethernet networks.
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Matching
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Match each item with a statement below: a. | PSE | f. | 802.3ae | b. | 1000Base-LX | g. | 802.3z | c. | 10Base-T | h. | 802.3u | d. | 100Base-T | i. | PD | e. | 1000Base-T |
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1.
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Follows the 5-4-3 rule of networking.
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2.
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The most common 1-Gigabit Ethernet.
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3.
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Also known as Gigabit Ethernet.
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4.
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Refers to the PoE device that receives the power.
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5.
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Also known as Fast Ethernet.
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6.
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Refers to the PoE device that supplies the power.
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7.
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IEEE standard for fiber-optic Ethernet networks transmitting data at 10
Gbps.
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8.
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IEEE standard for fiber-optic Ethernet networks transmitting data at 1
Gbps.
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9.
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IEEE standard for fiber-optic Ethernet networks transmitting data at 100
Mbps.
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Short Answer
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1.
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Describe the advantage of the star topology.
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2.
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Explain how the star-wired bus topology works. Include a description of its
drawbacks and benefits.
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3.
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Explain why it is important to understand logical topologies.
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4.
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Explain how the distributed backbone is connected. Include a description of its
benefits.
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5.
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Briefly explain how CSMA/CD works.
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6.
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Explain the 5-4-3 rule of networking.
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7.
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Within an Ethernet frame, describe the FCS (Frame Check Sequence) field and
explain how it is used to make the header.
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8.
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Within an Ethernet frame, describe what happens if fewer than 46 bytes of data
are supplied by the higher layers.
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9.
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What does the SFD identify?
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10.
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Briefly describe the IEEE 802.3af standard. Use an analogy and explain why it is
useful.
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