Flashcards in _wk_3_Questions_And_Answers Deck (56):
A frame is an unformatted sequence of bits. True or false?
Type of modulation that is not used in satellite transmission:
Amplitude is NOT used. Only frequesncy and phase modulations are used
Frequency and period are multiplicative
Frequency and period are the divisive inverse of each other. True or false?
The insulation of a fiber optic cable is also called its cladding. True or False?
Amplitude is more susceptible to noise than either frequency or phase modulation. True or False?
Is an IP Address part of the physcial layer?
What are the 4 physical layer components:
1. signaling methods used for conveying data and translating 2. circuit configuration that carries data, 3. transmission medium used - which the circuits are based on, 4 devices typically associated with the layer
in a point to point circuit, more than 2 devices can share the circuit at one time. True or false
False. The point to point configuration, a dedicated circuit is established between 2 devices
As a measurement, bits per second is associated with:
Types of modulation that can be used in radio broadcasting include
amplitude, frequency and phase
What components are part of the physical layer?
Signalling method and circuit configuration
Most network connections use multipoint circuits. True or false
The physcial layer is responsible for framing data bits. True or false
The physical layer encompasses such things as cables and connectors. True or false
Manchester is a digital encoding scheme used in Ethernet networks. True or false.
The physical layer assigns no meaning to the data bits it is transmitting. True or false
Thinnet is mostly being replaced with fiber optic cable. True or false
Transmission properties are defined at the physical layer. True or false
The capacity of a circuit to carry data is called
An analog wave can have only a finite, or limited, number of values or ranges. True or false
List 3 types of cables
twisted pair, coaxial, fiber optic
What allows the sender and receiver to synchronize their transmissions:
A cycle is the completion of one full pattern of a wave for frequency modulation. True or false
In the OSI and TCP/IP models, the physical layer communicaes directly with the________ layer
Most networks that use UTP, use category 1 cable the most. True or false
A unit representing 1,000 is called
What does not required an external clocking for synchronization?
Measures the ability of a material to reflect light rays:
Light emitting diodes are the most common light source for fiber optic. True or false
When something is effective it will also be efficient. True or false
Analog communications might use copper, fiber optic, or wireless media. True or false
When the symbol and bit rate are not the same we have _____________ signal modulation.
Bit rate and symbol rate are always the same. True or false.
Te physical layer of the OSI and TCP/IP models is very different. True or false
The bit interval is the duration it takes a single bit to be transmitted. True or False
A broadband connection has only one channel. True or false
UTP is more susceptib le to noise than either coaxial or fier optic cabling. True or false
With digital signaling, the use of external clocs is more efficient than the use of self-clocking encoding scheme. True or false
Analog waves can be modulated to represent binary 0s and 1s. True or false.
Full-duplex circuits allow for simultaneous sending and receiving of data transmissions. True or false
What determines how many bits will transmit one time as a block?
another term used for multipoint:
Bipolar encoding has a direct current component. True or false
if only two amplitudes are defined, how many bits per amplitude can be represented:
Term associated with a continuous representation:
Data bits are frequently passed through _____ in a connector
The binary bits 1 and 2 are used to encode data. True or false
A circuit is the link used by data in its transmission from one device to another. True or false
Requires eight separate wires for transmitting eight bits at one time in a block
Circuit configuration is not a component of the physical layer. True or false
10Base5 is an example of a braodband circuit. True or false
A disadvantage of fiber optic cable is that it is easy to tap into. True or false
Frequency is measured in hertz. True or false
Digital signals can suffer more noise problems than analog signals. True or false.