Big Deck Flashcards
If you only have a day to study
What is a recurring disturbance through space with or without physical medium?
Wave motion
Often related to water. Up and down movement and right angles?
Transverse Waves
Waves in the direction of propogation?
Longitudinal
Position, particle of matter would have if it were not disturbed by wave motion?
Reference line
Distance in space occupied by one cycle of a radio wave at any given instant?
Wavelength
Measurements wavelengths are expressed in?
Meters
121.5 MHz
International Aeronautical Emergency
123.1 MHz
Enroute aircraft, SAR Ops
156.8 MHz
VHF, Radiotelephone service
243 MHz
Distress and Emergency Frequency
4125 KHz and 6215 KHz
Carrier frequency, distress and safety
Wave property gives a relative indication of the amount of energy the wave transmits?
Amplitude
Continuous series of waves having the same amplitude and wavelengths?
Wave Train
Number of wave related occurrences per second?
Hertz
Number of vibrations, cycles of wave trains and unit of time frequency of wavetrains are measured in?
Hertz
Rate disturbance travels medium or velocity, Crest of waves?
Velocity
One complete vibrators cycle of events?
Period
Wave directed toward mirror?
Incident
What does the law of reflection dictate?
The angle of incidence is equal to the angle of reflection
What is bending when meeting an obstruction?
Diffraction
How does sound travel through a medium?
Wave motion
In the study of physics, range of compression wave frequencies to which the human ear is sensitive?
Sound
To distinguish frequencies in the audible range from those outside that range, the words (a) are used. Sounds capable of being heard by the human ear are called (b). The normal hearing range extends from about 20 to 20,000 hertz. However, to establish a standard sonic range, the Navy has set an arbitrary upper limit for sonics at (c) and a lower limit at (d).
(a) Sonic, Ultrasonic, Infrasonic
(b) Sonics
(c) 10,000 hertz
(d) 15 hertz
Sound heard by ear?
Sonics
Layer of the OSI model:
-Directly supports users and application.
Application
Transmission rate of a T2 line?
T2
-6.3 Mbps
Used to secure a LAN from a public network?
Firewalls
Topology that is the least reliable?
Star
Layer of the OSI model:
Provides representation of data used between application processes?
Presentation
Area Network with Basewide workstations?
Metropolitan area network
Area Network in which one base would connect to another?
MAN
Topology in which:
Components or nodes connected to the same cable.
Bus
Topology in which:
the far ends of the cable never meet.
Bus
Relates to flexible interconnection of incompatible systems?
OSI Model
What is the model for incompatible systems using data comms facilities?
OSI Model
Layer of the OSI model:
Decides the physical pathway the data should take.
Network
Transmission rate of a T3 line?
T3
46 Mbps
How many:
Primary modes of system operation are there?
2
During the pinging process:
What is the ping that is sent out called?
Echo message
Wiring concentrator:
That allows workstations to be inserted or bypassed on the ring.
MAU
Layer of the OSI model:
Error free transmission of information over the physical medium.
Data link
Two most common types of twisted-pair media?
Numbers of gauge.
22 and 24 gauge
Recording events and info to detect usage violations?
1st step of Auditing
Confirming network procedures operating?
2nd step of Auditing
How many:
Major functions do protocols have?
2
Computing element gets the attention of another element?
Interrupt
Duplicate hardware and network facility segments being available at all times?
Redundancy
How does sound travel through a medium?
Wave motion
Definition of sound?
Range of compression-wave frequencies to which the human ear is sensitive.
Layout the Navy’s sonics table.
Ultrasonic=more than 10,000 hertz
Upper limit for sonics=10,000 hertz
Lower limit for sonics=15 hertz
Infrasonic=less than 15 hertz
2 classifications for sound?
Noise or tones
