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protoype > Transmission Concepts I > Flashcards

Transmission Concepts I Flashcards

1
Q

What is “Amplitude”?

A

A measure of a signal’s strength.

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2
Q

What is “Hertz”?

A

A measure of frequency equivalent to the number of amplitude cycles per second.

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3
Q

What is “Frequency”?

A

The number of times that a signal’s amplitude changes over a fixed period of time, expressed in cycles per second, or hertz.

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4
Q

What is “Bit”?

A

A bit equals a single pulse in the digital encoding system. It may have only one of two values: 0 or 1.

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5
Q

What is “Byte”?

A

Eight bits of information. In a digital signaling system, broadly speaking, 1 byte carries one piece of information.

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6
Q

What is “Modulation”?

A

A technique for formatting signals in which one property of a simple carrier wave is modified by the addition of a data signal during transmission.

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7
Q

What is “Simplex”?

A

A type of transmission in which signals may travel in only one direction over a medium.

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8
Q

What is “Half-Duplex”?

A

A type of transmission in which signals may travel in both directions over a medium, but in only one direction at a time.

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9
Q

What is “Full-Duplex”?

A

A type of transmission in which signals may travel in both directions over a medium simultaneously.

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10
Q

What is “Muliplexing”?

A

A form of transmission that allows multiple signals to travel simultaneously over one medium.

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11
Q

What is “Throughput”?

A

The amount of data that a medium can transmit during a given period of time. Throughput is usually measured in megabits per second or Mbps. The physical nature of every transmission media determines its potential throughput.

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12
Q

What is “Cross Talk”?

A

A type of interference caused by signals traveling on nearby wire pairs infringing on another pair’s signal.

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13
Q

What is “Attenuation”?

A

The extent to which a signal has weakened after traveling a given distance.

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14
Q

What is “Latency”?

A

The delay between the transmission of a signal and its receipt

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15
Q

What is “RTT”?

A

The length of time it takes for a packet to go from sender to receiver, then back from receiver to sender. RTT is usually measured in milliseconds.

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16
Q

What is “EMI”?

A

A type of interference that may be caused by motors, power lines, televisions, copiers, fluorescent lights, or other sources of electrical activity.

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17
Q

What is the color code for TIA/EIA 568B Termination (from pin 1 to pin 8)?

A

Pin 1: Orange/White
Pin 2: Orange
Pin 3: Green/White
Pin 4: Blue
Pin 5: Blue/White
Pin 6: Green
Pin 7: Brown/White
Pin 8: Brown

18
Q

What is RTT?

A

(Round Trip Time). The length of time it takes for a packet to go from sender to receiver, then back from receiver to sender. This is measures in milliseconds.

19
Q

What is plenum?

A

Plastic insulation that surrounds each wire. Plenum is fire resistant and non-toxic. It must be used when wiring above ceiling tile.

20
Q

What is STP?

A

Shielded Twisted Pair. Multiple wires that are twisted to reduce EMI. IT has a grounded outer copper shield around the bundle of twisted pairs or around each pair. See image below.

21
Q

What is UTP?

A

Unshielded Twisted Pair - Multiple wire pairs that are twisted together and bundled in an outer sheath. See image below.

22
Q

What type of connection is this?

A

RJ-11

23
Q

What is Thicknet?

A

An IEEE physical layer standard for achieving a maximum of 10Mbps thoughput over coaxial copper calbe. Thicknet is also know as 10Base-5. It’s maximum segment length is 500 meters, and it relies on a bus topology.

24
Q

What is RG-6?

A

A type of coaxial cable with an impedance of 75 ohms and that contains an 18 AWG core conductor. RG-6 is used for television, satellite and broadband cable connections.

25
Q

What is RG-58?

A

A type of coaxial cable characterized by a 50-ohm impedance and a 24 AWG core. RG-58 was a poplular medium for Ethernet LANS in the 1980s, used for the now-obsolete 10BASE-2 standard.

26
Q

What is RG-59?

A

A type of coaxial cable characterized by a 75-ohm impedance and a 20 or 22AWG core, usually made of braided copper. Less expesnive but suffering greater attenuation than the more common RG-6 coax, RG-59 is used for relatively short connections.

27
Q

What is “TWISTED PAIR”?

A

A type of cable similar to telephone wiring that consists of color-coded pairs of insulated copper wires, twisted around each other and encased in plastic coating. See image below.

28
Q

What is Cat 3 ?

A

A form of UTP that contains four wire pairs and can carry up to 10Mbps, with a possible bandwidth of 15 MHz. Cat 3 was used for 10-Mbps Ethernet or 4-Mbps token ring networks.

29
Q

What is Cat 5?

A

A form of UTP that contains four wire pairs and supports up to 100-Mbps throughput and a 100-Mhz signal rate.

30
Q

What is Cat 5e?

A

A higher-grade version of Cat 5 wiring that contains high quality copper, offers a high twist ratio, and uses advanced methods for reducing cross talk. Enhanced Cat 5 can support signaling rate of up to 350 Mhz, more than triple the capability of regular Cat 5.

31
Q

What is Cat 6?

A

A twisted pair cable that contains four wire pairs, each wrapped in foil insulation. Additional foil insulation covers the bundle of wire pairs, and a fire-resistant plastic sheath cover the second foil layer. The foil insulation provides excellent resistance to cross talk and enables Cat 6 to support a signaling rate of 250 Mhz and a least six time the throughput supported by a regular Cat 5.

32
Q

What is Cat 6a?

A

A higher-grade version of Cat 6 wiring that further reduces attenuation and cross talk and allows for potentially exceeding traditional network segment length limits. Cat 6a is capable of a 500 MHz signaling rate and can reliably transmit data at a multi-gigabit per second rates.

33
Q

What is Cat 7?

A

A twisted pair cable that contains multiple wire pairs, each seperately shiedled then surrounded by another layer of shielding within the jacket. Cat 7 can support up to a 1-GHz signal rate. But because of the extra layers, it is less flexible than other forms of twisted pair wiring.

34
Q

Name the connector:

A

F-type Connector. Used for coaxial cabling.

35
Q

Name the Connector:

A

BNC connector. Used for coaxial cabling.

36
Q

What is the color code for TIA/EIA 568A Termination (from pin 1 to pin 8)?

A

What is the color code for TIA/EIA 568A Termination (from pin 1 to pin 8)?
Pin 1: Green/White
Pin 2: Green
Pin 3: Orange/White
Pin 4: Blue
Pin 5: Blue/White
Pin 6: Orange
Pin 7: Brown/White
Pin 8: Brown

37
Q

Name the connector below:

A

(STRAIGHT TIP CONNECTOR). Existing fiber networks might use ST connectors.

38
Q

Name the connector below:

A

ST or SUBSCRIBER CONECTOR

39
Q

Name the Connector:

A

LC or Local Connector

40
Q

Name the Connector:

A

MT-RJ or Mechanical Transfer Registered Jack. Connector is unique because it contains two strands of fiber in a single Ferrule, which is a short tube within a connector that encircles the fiber and keeps it properly aligned.

protoype (8 decks)

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