Deck 5: Topologies and Ethernet Standards
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Deck 5: Topologies and Ethernet Standards
1
A physical topology ____.
A) specifies device types
B) depicts a network in broad scope
C) specifies connectivity methods
D) specifies addressing schemes
A) specifies device types
B) depicts a network in broad scope
C) specifies connectivity methods
D) specifies addressing schemes
B
2
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
B) crash domain
C) interference domain
D) duplicate domain
A) collision domain
B) crash domain
C) interference domain
D) duplicate domain
C
3
Collectively, MPLS labels are sometimes called a ____.
A) header
B) shim
C) frame
D) title
A) header
B) shim
C) frame
D) title
B
4
The smallest LANs do not have a backbone.
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5
A ____ is simply a linked series of devices.
A) star
B) star-wired ring
C) ring
D) daisy-chain
A) star
B) star-wired ring
C) ring
D) daisy-chain
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6
All Ethernet networks, independent of their speed or frame type, use an access method called ____.
A) CSMA
B) CSMA/DC
C) CSAM/CD
D) CSMA/CD
A) CSMA
B) CSMA/DC
C) CSAM/CD
D) CSMA/CD
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7
In a ring network, each workstation acts as a(n) ____ for the transmission.
A) repeater
B) amplifier
C) terminator
D) manager
A) repeater
B) amplifier
C) terminator
D) manager
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8
The most common 1-Gigabit Ethernet standard in use today is ____.
A) 1000Base-T
B) 1000Base-SX
C) 10GBase-SR
D) 1000Base-LX
A) 1000Base-T
B) 1000Base-SX
C) 10GBase-SR
D) 1000Base-LX
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9
A complex combination of topologies is known as a ____ topology.
A) mixed
B) hybrid
C) compound
D) mulitpart
A) mixed
B) hybrid
C) compound
D) mulitpart
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10
The most common logical topologies are ____ and ring.
A) bus
B) star
C) wired
D) hybrid
A) bus
B) star
C) wired
D) hybrid
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11
The most popular method for connecting nodes on a network is circuit switching.
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12
The 10GBase-T standard is considered a breakthrough for transmitting 10 Gbps over ____ medium.
A) coaxial
B) twisted pair
C) fiber
D) atmosphere
A) coaxial
B) twisted pair
C) fiber
D) atmosphere
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13
A ____ occurs when two transmissions interfere with each other.
A) jam
B) collision
C) carrier sense
D) multiple access event
A) jam
B) collision
C) carrier sense
D) multiple access event
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14
A network's access method is its method of controlling how network nodes access the communications channel.
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15
Modern Ethernet networks are based on the star topology.
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16
In packet switching, when packets reach their destination node, the node ____ them based on their control information.
A) disassembles
B) deletes
C) reassembles
D) separates
A) disassembles
B) deletes
C) reassembles
D) separates
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17
A serial backbone is the simplest kind of backbone.
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18
The 10-gigabit fiber optic standard with the shortest segment length is ____.
A) 10GBase-T
B) 10GBase-SR
C) 10GBase-LR
D) 10GBase-ER
A) 10GBase-T
B) 10GBase-SR
C) 10GBase-LR
D) 10GBase-ER
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19
Without ____, a bus network would suffer from signal bounce.
A) hubs
B) repeaters
C) terminators
D) jamming
A) hubs
B) repeaters
C) terminators
D) jamming
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20
In the 10GBase-LR standard, the L stands for ____.
A) long reach
B) LAN
C) long ring
D) little ring
A) long reach
B) LAN
C) long ring
D) little ring
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21
Explain how the distributed backbone is connected. Include a description of its benefits.
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22
Within an Ethernet frame, describe what happens if fewer than 46 bytes of data are supplied by the higher layers.
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23
A network ____________________ is the part of a network to which segments and significant shared devices connect.
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24
Describe the advantage of the star topology.
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25
____________________ is a component of a network's logical topology that determines how connections are created between nodes.
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26
Briefly explain how CSMA/CD works.
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27
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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28
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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29
Given their long-distance capabilities, 10GBase-ER and 10GBase-EW are best suited for use on ____.
A) VANs
B) MANs
C) LANs
D) WANs
A) VANs
B) MANs
C) LANs
D) WANs
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30
Explain the 5-4-3 rule of networking.
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31
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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32
Explain why it is important to understand logical topologies.
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33
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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34
What does the SFD identify?
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35
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
B) header
C) preamble
D) frame
A) FCS
B) header
C) preamble
D) frame
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36
Explain how the star-wired bus topology works. Include a description of its drawbacks and benefits.
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37
The Ethernet II frame type contains a 2-byte ____ field that differentiates it from other Ethernet frame types.
A) data
B) length
C) source
D) type
A) data
B) length
C) source
D) type
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38
Together, the FCS and the header make up the ____-byte "frame" for the data.
A) 15
B) 18
C) 21
D) 24
A) 15
B) 18
C) 21
D) 24
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39
Briefly describe the IEEE 802.3af standard. Use an analogy and explain why it is useful.
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40
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