Midterm Flashcards by Jasmin Kai Ledezma

Q

The communication or reception of knowledge or intelligence

A

Information

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Q

128 ASCII symbols with only 8-bit byte

A

Standard ASCII Character Set

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Q

Uses all 8 bits per byte supports 256 symbols

A

Extended ASCII Character Set

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Q

He published the book The Mathematical Theory of Communication

A

1949, Claude Shannon

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Q

Book that was published by Claude Shannon

A

The Mathematical Theory of Communication

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Q

Disorder of a system

A

Entropy

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Q

Set of equally likely symbols

A

Entropy

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Q

Measurement of a probability

A

Redundancy

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Q

The two physical channel

A

Bounded
Unbounded

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Q

Example of bounded media

A

Pair of coaxial cable waveguide
Optical-fiber cable

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Q

Example of unbounded media

A

Atmosphere
Ocean
Outer space

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Q

Simplest type of bounded medium

A

Wire pairs

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Q

It is inserted along the line

A

Repeaters

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Q

EMI means

A

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Q

AWG means

A

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Q

PVC means

A

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Q

dB means

A

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Q

MHz means

A

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Q

He discovered the thermionic vacuum tube

A

1833, Thomas Edison

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Q

Elemen tube is called

A

Diode

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Q

Two element tube

A

Cathode
Anode

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Q

He use demodulator

A

Sir John Ambrose Fleming

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Q

It is use to Send signals to macroni company

A

Demodulator

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Q

He introduced the control grid

Study These Flashcards

A

1906, Lee DeForest

Have common axis

Coaxial Cable

UTP means

HF means

VF means

CW means

LOS means

FM means

it’s is point to point

Terrestrial radiolink system

receiver, amplifier transmitter section

Transponders

Alexander bell experiment on an

Harmonic telegraph

Commonly used at frequencies from 200 mhz

Waveguides

Used to connect network devices known as hubs

Backbone Cabling

Second method

Digital carrier system

Original signal

Analog wave

To carry signals in a particular medium

Bandwidth

Two ways

Frequency Time interval

Only one direction at a time

Half-duplex transmission

To carry information between two points

Modulation

Requires certain procedure

Protocol

Amplitude can be measured by:3

Characteristics of sine wave

Frequency Amplitude Phase

GND

SG

TD

RD

RTS

CTS

DSR

DTR

DCD

CD

RI

HLDLC