Guided Media Transmission Quiz
28 Questions
6 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Coaxial cable offers a higher data rate compared to twisted pair.

True (A)

The frequency range of optical fiber is typically between 186 to 370 GHz.

True (A)

Twisted pair cables are considered the most common medium for data transmission.

True (A)

For guided transmission media, the bandwidth of the antenna is more important than the medium itself.

<p>False (B)</p> Signup and view all the answers

Twisted pair cables are generally used for long-distance communication.

<p>False (B)</p> Signup and view all the answers

Multi-point connections in guided media lead to reduced attenuation.

<p>False (B)</p> Signup and view all the answers

Coaxial cable suffers from higher attenuation compared to twisted pair at 1kHz.

<p>False (B)</p> Signup and view all the answers

The typical repeater spacing for coaxial cable is greater than that for twisted pair.

<p>True (A)</p> Signup and view all the answers

The speed of radio waves is constant across all mediums.

<p>False (B)</p> Signup and view all the answers

Ground waves are used for AM radio broadcasts.

<p>True (A)</p> Signup and view all the answers

Sky waves are reflected off the troposphere layer of the atmosphere.

<p>False (B)</p> Signup and view all the answers

Line of sight propagation is not affected by refraction.

<p>False (B)</p> Signup and view all the answers

Free space loss is greater for higher frequencies.

<p>False (B)</p> Signup and view all the answers

Unshielded Twisted Pair (UTP) is the most expensive type of cable.

<p>False (B)</p> Signup and view all the answers

A Cat 5 cable can support a bandwidth of up to 100 MHz.

<p>True (A)</p> Signup and view all the answers

Category 7 cable utilizes Unshielded Twisted Pair (UTP) technology.

<p>False (B)</p> Signup and view all the answers

Coaxial cable is the least versatile medium for data transmission.

<p>False (B)</p> Signup and view all the answers

Analog signals transmitted through coaxial cable require amplifiers every 1 km.

<p>False (B)</p> Signup and view all the answers

Digital signals transmitted through coaxial cable require a repeater every 10 km.

<p>False (B)</p> Signup and view all the answers

Optical fiber offers lower attenuation compared to other guided media.

<p>True (A)</p> Signup and view all the answers

Injection Laser Diode (ILD) is cheaper than Light Emitting Diode (LED) when used in optical fiber transmission.

<p>False (B)</p> Signup and view all the answers

Wireless transmission frequencies range from 2 GHz to 40 GHz, which fall under the infrared spectrum.

<p>False (B)</p> Signup and view all the answers

Antennas are used to convert electromagnetic energy into radio frequency energy.

<p>True (A)</p> Signup and view all the answers

A parabolic reflective antenna uses a parabola to create a theoretical point source of radiation, producing a focused beam.

<p>False (B)</p> Signup and view all the answers

Antenna gain is measured in decibels, and a higher gain indicates a less directional antenna.

<p>False (B)</p> Signup and view all the answers

Satellite microwave communication requires the satellite to maintain a low earth orbit for effective transmission.

<p>False (B)</p> Signup and view all the answers

Broadcast radio uses a directional antenna to transmit signals over wider areas.

<p>False (B)</p> Signup and view all the answers

Infrared transmission is similar to microwave transmission, as both signals can easily penetrate walls.

<p>False (B)</p> Signup and view all the answers

Flashcards

Ground Wave Propagation

Signal follows the contour of the earth, effective up to 2MHz, used in AM radio.

Sky Wave Propagation

Signal is reflected from the ionosphere, used by amateur radio and global services.

Line of Sight Propagation

Signal travels directly between transmitter and receiver, effective above 30MHz, refraction may extend range.

Refraction

Bending of waves as they move between media due to changes in speed, influenced by density.

Signup and view all the flashcards

Multipath Interference

Occurrence of multiple signal copies due to reflections, impacting signal quality and reception.

Signup and view all the flashcards

Guided Transmission Media

Transmission media that use physical pathways, like cables.

Signup and view all the flashcards

Unguided Transmission Media

Transmission that uses wireless signals traveling through the air.

Signup and view all the flashcards

Attenuation

The reduction in signal strength as it travels through a medium.

Signup and view all the flashcards

Twisted Pair

A type of guided transmission medium made of pairs of wires twisted together.

Signup and view all the flashcards

Coaxial Cable

A cable with an inner conductor surrounded by a plastic insulator and an outer conductor.

Signup and view all the flashcards

Optical Fiber

A transmission medium that uses light to transmit data.

Signup and view all the flashcards

Bandwidth

The maximum data rate of a transmission medium.

Signup and view all the flashcards

Near End Crosstalk

Interference in twisted pair cables caused by signals coupling between pairs.

Signup and view all the flashcards

Unshielded Twisted Pair (UTP)

Common telephone wire that is cheap and easy to install but suffers from external EM interference.

Signup and view all the flashcards

Shielded Twisted Pair (STP)

Cabling with metal shielding to reduce interference, more expensive, and harder to handle.

Signup and view all the flashcards

Category 3 (Cat 3)

Supports up to 16MHz, mainly for voice grade applications in offices.

Signup and view all the flashcards

Category 5 (Cat 5)

Supports up to 100MHz and is commonly pre-installed in new office buildings.

Signup and view all the flashcards

Analog Coaxial Transmission

Requires amplifiers every few kilometers to transmit signals effectively.

Signup and view all the flashcards

LED in Optical Fiber

A cheaper light source used in fiber optics, offering a wider temperature range.

Signup and view all the flashcards

Antenna Gain

Measure of directionality; the power output compared to an isotropic antenna.

Signup and view all the flashcards

Parabolic Reflective Antenna

Antenna that focuses beams of light/radio in a parallel beam using a parabolic shape.

Signup and view all the flashcards

Satellite Microwave

Uses satellites as relay stations to amplify signals and transmit them over long distances.

Signup and view all the flashcards

Broadcast Radio

Omnidirectional transmission used for FM radio and TV, susceptible to multipath interference.

Signup and view all the flashcards

Infrared Communication

Uses noncoherent infrared light for line-of-sight transmission, blocked by walls.

Signup and view all the flashcards

Wavelength Division Multiplexing

Technique used in fiber optics to combine multiple signals for transmission at different wavelengths.

Signup and view all the flashcards

Fiber Attenuation

Loss of signal strength as it travels through optical fiber, lower than other mediums.

Signup and view all the flashcards

Study Notes

Transmission Media Overview

  • Transmission media are categorized as guided (wire) and unguided (wireless).
  • Guided media quality is determined more by the medium itself.
  • Unguided media quality is determined more by the bandwidth produced by the antenna and the distance.
  • Key concerns are data rate and distance.

Design Factors

  • Bandwidth directly affects data rate.
  • Transmission impairments include attenuation.
  • Interference is a factor.
  • The number of receivers in guided media introduces more attenuation.

Electromagnetic Spectrum

  • The electromagnetic spectrum displays various frequencies and their corresponding applications.
  • Different types of communication use various portions of the spectrum.
  • Examples of media shown on the chart include twisted pair, coaxial cable, and optical fiber.

Guided Transmission Media

  • Twisted pair, coaxial cable, and optical fiber are examples.

Transmission Characteristics of Guided Media

  • Specific frequency ranges, attenuation values, typical delay rates, and repeater spacing are detailed for each type of guided media.

Twisted Pair

  • Properties include separately insulated wires twisted together, often bundled in cables, commonly used in building installations.
  • Applications include telephone networks (subscriber loops), internal building wiring, and local area networks (LANs).
  • Pros include cheap and easy to work with. Cons include low data rate and short range.

Twisted Pair - Transmission Characteristics

  • Analog signals use amplifiers every 5km to 6km.
  • Digital signals use either analog or digital signals along with repeater every 2km or 3km.
  • Has a limited bandwidth of 1MHz and data rate of 100MHz.
  • Vulnerable to noise and interference.
  • Near-end crosstalk is a concern.
  • Unshielded twisted pair (UTP) is cheaper and easier to install than shielded twisted pair (STP).

UTP Categories

  • Different categories of UTP exist (e.g., Cat 3, Cat 5, Cat 5E, Cat 6, Cat 7), differing in bandwidth capabilities.

Comparison of Shielded and Unshielded Twisted Pair

  • A table comparing attenuation and near-end crosstalk for various UTP categories.

Twisted Pair Categories and Classes

  • Various categories and classes of twisted pair are presented, with different bandwidths and cable types and their link costs.

Coaxial Cable

  • Structure includes a central conductor, insulation, a woven or foil shield, and a protective outer sheath.
  • Applications include TV distribution, long-distance telephone transmission, and local area networks.
  • The transmission characteristics include analog signals using amplifiers.
  • Digital signals use repeaters every 1km.
  • Its design is better for higher frequency applications.

Optical Fiber

  • Structure describes the core, cladding, and jacket.
  • Benefits include high capacity, small size, low attenuation, electromagnetic isolation, and long repeater spacing.
  • Applications include long-haul trunks, metropolitan trunks, rural exchange trunks, subscriber loops, and LANs.
  • Transmits light using LED or ILD.

Optical Fiber - Transmission Characteristics

  • Acts as a wave guide for higher frequencies.
  • Different types like LED and ILD are highlighted.

Optical Fiber Transmission Modes

  • Diagrams showing step-index multimode, graded-index multimode, and single-mode fibers are included along with the output pulse characteristics.

Frequency Utilization for Fiber Applications

  • A table displaying the wavelengths, frequency, band label, and fiber type relevant to various applications.

Free Space Loss

  • A graph showing free space loss depending on the frequency and distance for different applications.

Wireless Transmission Frequencies

  • Frequencies for microwave (2GHz to 40GHz), broadcast radio (30MHz to 1GHz), and infrared are listed.

Antennas

  • Antennas as electrical conductors that radiate or collect electromagnetic energy.
  • Applications for transmission and reception are highlighted.

Radiation Pattern

  • Isotropic antennas radiate equally in all directions (theoretical). Real antennas have directional patterns.

Parabolic Reflective Antenna

  • Paraboloid antennas are designed to reflect waves in specified directions, like satellite dishes.
  • Focus is a key design concept

Antenna Gain

  • Measuring directionality of an antenna relative to an isotropic antenna and its power output at specific directions using decibels.
  • Effective area relates to size and shape.

Terrestrial Microwave

  • Applications and properties of parabolic, focused beam, line of sight, long haul communication, high frequencies are noted.

Satellite Microwave

  • Satellite systems used as relay stations, geo-stationary orbits are properties, and applications are listed for television, long-distance telephone, and business networks.

Broadcast Radio

  • Properties include Omnidirectional, FM radio, UHF/VHF television, line of sight, multipath interference.

Infrared

  • Transmission is over short distances due to light. Modulation is a key aspect.

Wireless Propagation

  • Three propagation routes are noted: ground wave, sky wave, line of sight.

Ground Wave Propagation

Sky Wave Propagation

Line of Sight Propagation

Refraction

Optical and Radio Horizons

  • Distinctions between optical and radio horizons are described graphically.

Line of Sight Transmission

  • Free space loss, atmospheric absorption, multipath, and refraction as transmission impairments.

Multipath Interference

  • Diagrams (a) and (b) showcase microwave line of sight and mobile radio multipath interference.

Required Reading

  • Stallings Chapter 4 is the required reading.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Data and Computer Communications 7th Edition PDF

Description

Test your knowledge on guided transmission media, including coaxial cables, twisted pair, and optical fiber. This quiz covers data rates, bandwidth, and the importance of different media in communication. Dive into the specifics of attenuation, repeaters, and wave propagation.

More Like This

Transmission Media Quiz
40 questions

Transmission Media Quiz

LucrativeSaxhorn avatar
LucrativeSaxhorn
Guided vs. Unguided Transmission Quiz
21 questions

Guided vs. Unguided Transmission Quiz

UnmatchedMotif avatar
UnmatchedMotif
Medios de Transmisión Digital
5 questions

Medios de Transmisión Digital

PraiseworthyAgate avatar
PraiseworthyAgate
Unidad 4: Medios de Transmisión Guiados
45 questions

Unidad 4: Medios de Transmisión Guiados

WellEstablishedCuboFuturism8628 avatar
WellEstablishedCuboFuturism8628
Use Quizgecko on...
Browser
Open
Browser
Browser