NAVEDTRA 14224, INFORMATION SYSTEMS TECHNICIAN TRAINING SERIES MODULE 3--NETWORK COMMUNICATIONS Flashcards
What can be used to amplify electrical signals?
Repeaters
What make it possible to interconnect like LANs?
Bridges
What enable networks to communicate using the most efficient path?
Routers
What make it possible to interconnect unlike LANs?
Gateways
Which layer of the OSI model do repeaters work at?
1
Which layers of the OSI model do bridges work on?
1 and 2
Which layer of the OSI model do routers work on?
3
Which layers of the OSI model can a brouter work on?
2 or 3
Which layer of the OSI model do gateways work on?
7
What serves as a termination point for cable running from individual nodes in a network?
Concentrator
Which device serves as a common termination point that can relay signals along the appropriate paths?
Hub
Which type of transmission media is immune to interference caused by electrical or electronic devices?
Fiber
Which type of cable refers to the cable that forms the main trunk of a network?
Backbone
How many different types of backbone cable are recognized by EIA/TIA-568?
4
What is the central computer in a network that is responsible for managing the network?
Server
Which type of servers can be used as both a server and a workstation?
Non-dedicated
What are the majority of all network-related problems caused by?
Operator error
How many primary culprits to network malfunctions are there?
3
How many categories are component failures categorized into?
2
What are the simple set of system checks called that are stored in ROM that are run when the computer is turned on?
Power On Self Test (POST)
Which device can be used to monitor the activity of a network and the stations on it and provides daily summaries or long-term trends of network usage and performance?
Network analyzer
What is the simultaneous presence of signals from two nodes on the network referred to as?
Data collision
What is the hardware signal that is sent from a potential transmitter to a destination to indicate that the transmitter wishes to begin a transmission?
Request To Send (CTS)
Which term is used to describe the random electrical signals that become part of a transmission, that serve to make the signal component of the transmission more difficult to identify?
Noise
What is the hardware signal that is sent from a receiver to a transmitter to indicate that the transmitter can begin sending?
Clear To Send (CTS)
How is the Signal-to-Noise Ratio (SNR) usually expressed?
dB
What can be used to determine how long a cable segment can be before the signal loss is unacceptably high?
Signal-to-Noise Ratio (SNR)
What is defined as the decrease in signal strength, measured in decibels (dB) per 100 feet?
Attenuation
What is defined as interference in the form of a signal from a neighboring cable or circuit?
Crosstalk
What is used to try to eliminate the effects of certain types of distortions on the signal?
Line conditioning
Which device is used to test the integrity of a section of cable before the cable is even unwound?
Time Domain Reflectometry (TDR)
Which type of connector uses two prongs to pierce the cable to make its connection?
Vampire tap
