stars Flashcards
What is the advantage of using shielded over unshielded
reduces noise
What are the three types of converters?
Analog to Digital
Digital to Analog
Network Media
a communication device that combines several or voice signals for transmission over one single medium
Multiplexer
What are the benefits of a multiplexer?
Error detection
Data Correction and security
Cuts communication costs
What type of connectors does the unshielded twisted pair cable use?
Telephone type connectors with insulated wires
combines several data signals onto a single fiber optic cable for transmission
Wave Division Multiplexing
What two types of multi-mode fiber communication medium type cables exist?
Graded
Stepped
What advantage does single-mode fiber communication medium type cable have over multi-mode fiber?
Distance
How does time division multiplexing combine signals on a single line for transmission?
Scrambles packets into smaller segment with each data stream assigned a specific time slot in a set
What occurs within a specific time slot if there is no data to send?
The time slot is left blank
a time division multiplexer process of converting speech from an analog signal into an encoded digital value?
Pulse Code Modulation
What are the 3 parts of a CPU?
Control Unit
Registers
Arithmetic Logic Unit (ALU)
RAM
data lost during power off
ROM
data retained during power off
In wave division multiplexing, why are signals converted into light prior to multiplexing?
light at different frequencies doesn’t interfere with each other
What are 3 examples of wired networks?
Local Area Network
Metro Area Network
World Wide Web
What is a bus topology?
A network that uses long cable as a central backbone and attaches each node via a drop cable
What is a Star topology?
A network that uses a central node to connect peripheral nodes
What is a Mesh topology?
each device is connected to every other device by separate cabling
What is a Tree topology?
hybrid topology that combines characteristics of star and bus topologies
a standard method which enables communication and with an agreed upon format for transmitting data between two network devices
protocol
What type of communication guarantees the delivery of information or data by the protocols employed to transmit it?
Connection Oriented Communication
What is the application layer responsible for?
it relates to the services that directly support user application
What layer is responsible for the delivery and formatting of information to the application layer for further processing or display?
Presentation layer
