Chapter 4 Flashcards

1
Q

5 Basic Communication Media Types

A
Coaxial Cable 
Wireless
Hybrid 
Fiber Optic 
Twisted Pair
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2
Q

Categories of Unshielded

A
3
4
5
5e
6
6a
6e
7
7a
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3
Q

Types of Interferences

A

EMI (Electromagnetic Interference)

RFI (Radio Frequency Interference)

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4
Q

Backbone Cabling

A

Main cable in your network; transfers main data between circuits

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5
Q

Plenum Cable

A

Does not emit a toxic vapor when burned through

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6
Q

Impedance

A

Restricts flow of currents, if there are no currents then there is no impedance

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7
Q

Coaxial Cable

A

2 types:

  • thick: used as backbone
  • thin: used to connect computers (no one uses anymore)
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8
Q

MAU

A

Media Access Unit

Allows computers to connect to coaxial cable

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9
Q

10Base5

A

10=cable transmission rate
Base=baseband connection
5=500 meters for cable run (distance)

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10
Q

Twisted Pair

A
Twisting reduces EMI and RMI
2 types:
- Unshielded 
- Shielded
Twisted uses RJ-45 connector
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11
Q

Shielded (STP)

A

Further reduces EMI and RFI

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12
Q

Unshielded (UTP)

A

No shielding between wires and encasement

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13
Q

Fiber Optic Cable

A
Used for cable backbone
Advantages:
- Multimode transmission capacity (high capacity)
- No EMI or RFI
- Low attenuation
- Long distance
- Secure against taping
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14
Q

Attenuation

A

When signal gets lost during travel

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15
Q

Horizontal Cabling

A

Cable that lays out on the floor

Connects workstation to server

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16
Q

Vertical Cabling

A

Connects server to server

17
Q

Two Modes in Fiber Optic Cable

A
  • Single mode: used for long-distance, one wavelength with no interference
  • Multimode: used for multiple wavelengths with interference from itself not outside sources, support LED
18
Q

Transmission Speeds

A
10 mbps
100 mbps
1 gbps
10 gbps
40 gbps
100 gbps
19
Q

Network Interface Card’s 4 Components for a Connection

A
  • communications medium
  • hardware and protocols control firmware and drivers
  • transceivers
  • MAC sublayer support of Data Link Layer
20
Q

Duplex Types

A

Half: one way transmission, one at a time sending
Full: transmission from both ways at the same time

21
Q

Demand Priority

A

Ensures signal travels in one direction

Doesn’t use CSMA/CD along with 10 gbps ethernet

22
Q

Transceiver

A

Device that transmits and receives signals on a communications cable

23
Q

Sublayers

A

MAC: formats frames
LLC: initiates and maintains links between nodes

24
Q

Bus

A

Data pathway inside the computer