Chapter 3 Section 1 (3.1) Flashcards
Users of an enterprise’s data communication infrastructure will be able to share common
equipment, software, data
The two lower-level layers of the OSI and TCP/IP models are the:
physical layer and data link layer
The ________ layers of the OSI and TCP/IP models serve the same function in a very similar manner.
physical
) The ________ passes frames of data bits down to the ________.
data link layer, physical layer
A ________ is a specially formatted sequence of bits and occurs at the data link layer.
frame
Most networks make use of some type of digital ________ scheme.
encoding
A ________ defines a set of rules for representing how a 0 or 1 is to be represented
signaling method
A ________ connects the devices with the networks.
physical transmission medium
) A paper document such as a sales invoice has data that must be ________ into a form that a physical transmission medium can support.
encoded
Binary bits have to be further transformed into ________ form. This transformation turns the physical layer’s data bit stream into energy in the form of ________ signals.
electromagnetic, electromagnetic
The term ________ refers to a measure, form, or expression that is continuous and has a range of magnitude between one value and another.
analog
) ________ takes place when the height of a sound wave is manipulated to encode a binary 0 or 1.
Amplitude modulation
Amplitude modulation is measured in ________, depending on the type of signal
watts, volts, or amperes
Frequency modulation is also called ________.
frequency shift keying (FSK)
Frequency modulation also has an element called the ________, which is the amount of time, in seconds, that a signal needs to complete one cycle.
period
) Frequency is measured in hertz, kilohertz, megahertz, gigahertz, or ________.
terahertz
Kilo is the prefix for:
thousand
) A period is measured in seconds, milliseconds, microseconds, nanoseconds, or ________.
picoseconds
If the frequency unit is Gigahertz, the period unit is ________.
nanoseconds
If the frequency unit is Megahertz, the period unit is ________.
microseconds