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Network+ N10-008 Todd Lammle > 3. Networking Connectors and Wiring Standards > Flashcards

3. Networking Connectors and Wiring Standards Flashcards

1
Q
  1. Why would a network administrator use plenum-rated cable during an installation? (choose two)
    a. Low combustion temperature
    b. High combustion temperature
    c. Reduces toxic gas released during a fire
    d. Is not susceptible to any interference
A

b, c. Plenum-rated means that the cable’s coating doesn’t burning until a much higher temperature of heat, doesn’t release as many toxic fumes as PVC when it does burn, and is rated for use in air plenums that carry breathable air, usually as non-enclosed fresh-air return pathways that share space with cabling.

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2
Q
  1. Which of the following ethernet unshielded twisted-pair cabling types is/are commonly used?
    a. 10BaseT
    b. 100BaseTX
    c. 1000BaseTX
    d. All of the above
A

d. UTP is commonly used in twisted-pair ethernet like 10BaseT, 100BaseTX, 1000BaseTX and so on.

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3
Q
  1. In which of the following categories is UTP cable not rated?
    a. Category 2
    b. Category 3
    c. Category 5e
    d. Category 9
A

d. Unshielded twisted pair has standards from Category 2 through 8 for use on ethernet networks. There is no category 9 defined.

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4
Q
  1. What type of connector does UTP cable typically use?
    a. BNC
    b. ST
    c. RJ-45
A

c. UTP usually connects with RJ-45. You use a crimper to attach an RJ connector to a cable.

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5
Q
  1. Which of the following provides the longest cable run distance?
    a. Single-mode fibre
    b. Multi-mode fibre
    c. Category 3 UTP
    d. Coax
A

a. Single mode fibre allows for the maximum cable run distances.

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6
Q
  1. You need to crimp on a connector using an RJ-45 connector. Which pin-out configuration would you use to connect a host to a switch?
    a. UTP
    b. Straight-through
    c. Crossover
    d. Rolled
A

b. You would use a straight-through cable to connect a host to a switch, and the typical pin-out is called T568A.

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7
Q
  1. Why is fibre-optic cable immune to electromagnetic interference (EMI) and radio frequency interference (RMI)?
    a. Because it transmits analog signals using electricity.
    b. Because it transmits analog signals using light impulses.
    c. Because it transmits digital signals using light impulses.
    d. Because it transmits digital signals using electricity.
A

c. Fibre-optic cable transmits digital signals using light impulses rather than electricity; therefore, it is immune to EMI and RFI.

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8
Q
  1. What type of cable transmits lights from end to end?
    a. COAX
    b. Fibre-optic
    c. UTP
    d. Category 2
A

b. Remember that fibre-optic cable transmits a digital signal using light impulses. Light is carried on either a glass or a plastic core.

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9
Q
  1. What is the main difference between single-mode fibre (SMF) and multi-mode fibre (MMF)?
    a. Electrical signals
    b. Number of light rays
    c. Number of digital signals
    d. That single-mode can be run a shorter distance.
A

b. The difference between single-mode fibres and multi-mode fibres is in the number of light rays (and thus the number of signals) they can carry. Generally speaking, multi-mode fibre is used for shorter distance applications and single-mode fibre for longer distances.

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10
Q
  1. What type of cable should be used if you need to make a cable run longer than 100 meters?
    a. Category 5e
    b. Category 6
    c. Fibre-optic
    d. Coaxial
A

c. Standards limit UTP to 100 meters. Different fibre-optic types have different maximum lengths, but fibre-optic is the only cable type that can extend well beyond 100 meters.

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11
Q
  1. Which of the following are fibre-optic connectors? (choose three)
    a. BNC
    b. ST
    c. RJ-11
    d. SC
    e. LC
    f. RJ-45
A

b, d, e. There are many different types of fibre-optic connectors. SC, ST, LC and MT-RJ are some of the more typical connectors in use today.

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12
Q
  1. You need to connect two devices on a network and they need to send voice traffic. Which of the following cables will you use?
    a. Cat 3
    b. Cat 5
    c. CSU/DSU
    d. Rolled
A

b. To connect two devices for voice on a vertical connect, the minimum cable you can use is category 5.

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13
Q
  1. How many hosts on a half-duplex segment can talk at one time?
    a. Zero
    b. One
    c. Two
    d. Unlimited
A

b. In half-duplex communication, a device can either send communication or receive communication, but it cannot do both at the same time.

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14
Q
  1. On which type of cable does EMI have the least effect?
    a. Coax
    b. Fibre-optic
    c. UTP
    d. STP
A

b. Fibre-optic cable transmits only light (not electricity like UTP), so EMI has zero effect on it.

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15
Q
  1. How many devices can be connected to a full duplex segment?
    a. Zero
    b. One
    c. Two
    c. Four
A

c. Full-duplex communication requires a point-to-point configuration between two directly connected devices because the collision-avoidance circuit is disabled.

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16
Q
  1. How many wires are used in 100BaseTX UTP transmission?
    a. Two
    b. Four
    c. Six
    d. Eight
A

b. 100BaseTX utilises only pins 1,2,3 and 6.

17
Q
  1. A crossover cable is used to connect all of the following except _____ .
    a. Switch to switch
    b. Host to host
    c. Hub to switch
    d. Host to switch
A

d. All devices that are pinned the same for transmit and receive require a crossover cable to communicate directly. The current switches can auto-detect the cable type.

18
Q
  1. How is a T1 crossover cable wired?
    a. Pins 1, 2, 4 and 5 are connected to pins 4, 5, 1 and 2
    b. Pins 2, 3, 4 and 5 are connected to pins 4, 5, 1 and 2
    c. Pins 1, 2, 4 and 5 are connected to pins 3, 4, 5 and 6
    d. Pins 4, 5, 6 and 7 are connected to pins 4, 5, 1 and 2
A

a. A T1 cable uses pairs 1 and 2, so connecting two T1 CSU/DSU devices back-to-back requires a crossover cable that swaps these pairs. Specifically, pins 1, 2, 4 and 5 are connected to pins 4, 5, 1 and 2 respectively.

18
Q
  1. The purpose of the demarcation point is to separate the customer from whom?
    a. The branch office?
    b. Headquarters
    c. The data centre
    d. The service provider
A

d. The demarcation point, or demarc, is the point at which the operational control or ownership changes from your company to the service provider. This is often at the MDF in relation to telephone connections and the CSU/DSU in regard to WAN connections.

19
Q
  1. You need to make a T568B cable for a fast ethernet link. How many pairs will you use?
    a. One
    b. Two
    c. Three
    d. Four
A

b. Fast Ethernet is 100BaseTX and this type of cable uses two pairs of wires.

Network+ N10-008 Todd Lammle (33 decks)

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